Patent Application
20150232489
The present invention relates to a functionalizable organosilane polysilylated precursor and to its preparation method.
The invention also relates to a functionalized organosilicon material derived from this precursor.
Functionalizable organosilane precursors have a major benefit in many fields because they allow the manufacturing of mono- or poly-functionalized organosilicon hybrid materials, which may appear as a powder, a coating or a polymer or may be integrated into a silicone matrix.
They also allow the manufacturing of products appearing as functionalized particles, notably functionalized nanoparticles, for example with an active remainder, which may notably be salted out in a controlled way under the action of one or several parameters.
The reaction between organosilane precursors comprising a nitride group and a functional compound comprising an alkyne group has been described, giving the possibility of thus obtaining functionalized organosilane compounds (Moitra et al., Chem. Commun., 2010, 46, 8416-8418: Bürglova et al., J. Org. Chem., 2011, 76, 7326-7333).
However, the described precursors are monosilylated precursors and the described reaction only gives the possibility of resulting in organosilane compounds comprising in majority simple functionalities, such as amine, alcohol, thiol, halide, alkyl or phenyl.
Moreover organosilane precursors in which a reactive group is bound to two silylated chains have been described (Shea et al., Functional Hybrid Materials, 2004, 50-85). However, the fact that the reactive group is directly bound to the silylated chains reduces access to other reactive groups and thus limits the possibilities of a subsequent reaction.
Thus, a first object of the invention is to provide organosilane precursors with which it is possible to obtain functionalized polysilylated organosilane compounds which get rid of the problems of the state of the art and which provide a solution to all or part of the problems of the state of the art.
Another object of the invention is to propose polysilylated organosilane precursors for which the preparation method is easy to apply and has a high yield.
Another object of the invention is to propose polysilylated organosilanes giving the possibility of preparing post-functionalizable organosilicas which may appear in various forms, such as monolithic nanoparticle films or further powders
An object of the present invention is a compound of formula (I)
wherein:
According to the invention, in the groups of formulae A7 to A12 and B7 to B12, the substituent groups may be present on one of the aryl groups forming the naphthyl radical or on each of the aryl groups forming the naphthyl radical.
According to the invention, in the groups U1, U2, U5, U6, U7, U8, V1, V2, V5, V6, V7 and V8, the nitrogen atom ensures the bond with the remainder of the compound of formula (I).
According to the invention, in the groups U3, U4, U5, V3 and V4, the sulfur atom ensures the bond with the remainder of the compound of formula (I).
The compound according to the invention may be a compound of formula (II)
The definitions of R1, R2, R3, R4, R5, R6, E1, E2, E3, E4, E5, E6, A, U, Q, V, B, a, b, c, d, e, f, g, h, i, j, k, l, m, n, o and q for the compound of formula (I) according to the invention apply to the compound of formula (II).
The invention also provides a compound of formulae (IIa), (IIb) or (IIc)
The definitions of R1, R2, R3, R4, R5, R6, E1, E2, E3, E4, E5, E6, E7, E12, A, B, Q, a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q and w for the compound (I) according to the invention apply to the compounds of formula (IIa), (II) and (IIc).
The invention also provides a compound of formulae (IId) or (IIe)
The definitions of R1, R2, R3, R4, R5, R6, E1, E2, E3, E4, E5, E6, A, B, Q, U, V, a, b, d, e, f, g, h, i, j, k, l, m, n, o and q for the compound of formula (I) according to the invention apply to the compounds of formula (IId) and (IIe).
The invention also provides a compound of formulae (IIf), (IIg), (IIh), (IIi), (IIj) or (IIk)
The definitions of R1, R2, R3, R4, R5, R6, E1, E2, E3, E4, E5, E6, E7, E12, A, B, Q, a, b, d, e, f, g, h, i, j, k, l, m, n, o, p, q and w for the compound of formula (I) according to the invention apply to the compounds of formula (IIf), (IIg), (IIh), (IIi), (IIj) and (IIk).
Preferably, the compound may be a compound of formula (IIi), (IIj) or (IIk).
According to the invention, the compound may be a compound of formula (III), (IV) or (V)
The definitions of R7, R8, R9, A, U, Q, V, B, a, b, c and q for the compound of formula (I) according to the invention apply to the compounds of formula (III), (IV) and (V).
The invention also provides a compound of formulae (VI), (VII) or (VIII) respectively obtained by polycondensation of a compound of formula (III), (IV) or (V) according to the invention
The definitions of R7, R8, R9, A, U, Q, V, B, a, b, c and q for the compound of formula (I) according to the invention apply to the compounds of formula (VI), (VII) and (VIII).
According to the invention, z may represent an integer ranging from 2 to 2,000,000.
According to the invention, the compounds of formulae (VI), (VII) or (VIII) are units present within polymeric structures.
Thus, the compounds of formula (VI), (VII) or (VIII) represent monomers or oligomers for preparing other oligomers or polymers.
The invention provides an exemplary compound of formula (VIII):
The definitions of A, U, Q, V, B, a, b, c and q for the compound of formula (I) apply to the compound of formula (VIII).
Advantageously, for the compounds according to the invention:
Advantageously, the compound according to the invention is a compound of formulae (II), (IIa), (IIb), (IIc), (IId), (IIe), (IIf), (IIg), (IIh), (Iii), (IIj) or (IIk) wherein:
Also advantageously, the compound according to the invention is a compound of formulae (II), (IIa), (IIb), (IIc), (IId), (IIe), (IIf), (IIg), (IIh), (Iii), (IIj) or (IIk) wherein R1, R2, R3, R4, R5 and R6 represent independently an alkoxy group, preferably methoxy or ethoxy.
Also advantageously, when R1, R2, R3, R4, R5 and R6 represent independently an alkoxy group, j, k, l, m, n and o do not represent 0.
As an example of a compound of formula (IIf) according to the invention, mention may be made of the compound of formula (IIf-1)
As examples of compounds of formula (IIg) according to the invention, mention may be made of the compounds of formulae (IIg-1) or (IIg-2)
As an example of a compound of formula (IIh) according to the invention, mention may be made of the compound of formula (IIh-1)
As an example of a compound of formula (IIi) according to the invention, mention may be of the compound of formula (IIi-1)
As examples of compounds of formula (IIj) according to the invention, mention may be made of the compounds of formulae (IIj-1), (IIj-2) or (IIj-3):
Advantageously, the compound according to the invention is a compound of formula (III), (IV), (V), (VI), (VII) or (VIII) wherein:
The object of the invention is also a method for preparing a compound of formula (IIa)
wherein:
wherein the definitions and preferred characteristics of R1, R2, R3, R4, R5, R6, E1, E2, E3, E4, E5, E6, A, B, Q, a, b, c, d, e, f, g, h, i, j, k, l, m, n and o and q for the compound (I) according to the invention apply to the compounds of formula (IX):
and a compound of formula (X)
N3E7pI (X)
According to the invention, the reaction may be conducted between a compound equivalent of formula (IX) and (c+1) equivalents of a compound of formula (X) in the presence of 2×(c+1) equivalents of potassium carbonate.
According to the invention, the definition of c is identical with the definition of c for the compound of formula (IX) and may thus represent 0, 1, 2 or 3.
According to the invention, the reaction between the compound of formula (IX) and the compound of formula (X) occurs in a solution in the presence of potassium carbonate.
According to the invention, the content of compound of formula (IX) in the solution may range from 0.001 to 1 mol/L, preferably from 0.1 to 0.2 mol/L.
According to the invention, the reaction may be conducted in the presence of a solvent, preferably acetonitrile.
According to the invention, the reaction may be conducted at 85° C. and under an inert atmosphere for a period ranging from 15 to 24 h.
The object of the invention is also a method for preparing a compound of formula (IIb)
wherein:
wherein the definitions and preferred characteristics of R1, R2, R3, R4, R5, R6, E1, E2, E3, E4, E5, E6, A, B, Q, a, b, c, d, e, f, g, h, i, j, k, l, m, n and o and q for the compound (I) according to the invention apply to the compounds of formula (XI):
and a compound of formula (XII)
According to the invention, the reaction may be conducted between an equivalent of a compound of formula (XI) and (c+1) equivalents of compound of formula (XII) in the presence of 2×(c+1) equivalents of calcium hydride.
According to the invention, the definition of c is identical with the definition of c for the compound of formula (XI) and may thus represent 0, 1, 2 or 3.
According to the invention, the reaction between the compound of formula (XI) and the compound of formula (XII) occurs in a solution in the presence of calcium hydride.
According to the invention, the content of a compound of formula (XI) in the solution may range from 0.001 to 1 mol/L, preferably from 0.1 to 0.5 mol/L.
According to the invention, the reaction may be carried out in the presence of a solvent, preferably tetrahydrofurane.
According to the invention, the reaction may be carried out at a temperature ranging from 15 to 30° C. and under an inert atmosphere for a period ranging from 15 to 24 h.
The object of the invention is also a method for preparing a compound of formula (IIc)
wherein:
wherein the definitions and preferred characteristics of R1, R2, R3, R4, R5, R6, E1, E2, E3, E4, E5, E6, A, B, Q, a, b, c, d, e, f, g, h, i, j, k, l, m, n and o and q for the compound (I) according to the invention apply to the compounds of formula (XIII):
and a compound of formula (XIV)
According to the invention, the reaction may be conducted between an equivalent of compound of formula (XIII) and (c+1) equivalents of compound of formula (XIV) in the presence of 2×(c+1) equivalents of potassium carbonate.
According to the invention, the definition of c is identical with the definition of c for the compound of formula (XIIII) and may thus represent 0, 1, 2 or 3.
According to the invention, the reaction between the compound of formula (XIII) and the compound of formula (XIV) occurs in a solution in the presence of potassium carbonate.
According to the invention, the content of a compound of formula (XIII) in the solution may range from 0.001 to 1 mol/L, preferably from 0.1 to 0.2 mol/L.
According to the invention, the reaction may be carried out in the presence of a solvent, preferably acetonitrile.
According to the invention, the reaction may be carried out at 85° C. and under an inert atmosphere for a period ranging from 15 to 24 h.
Another object of the present invention relates to a method for preparing a compound of formula (VI) comprising the hydrolysis of a compound of formula (XV)
The whole of the characteristics or preferences for R7, R8, A, U, Q, V, B, a, b, c and q apply to the compound of formula (XV).
According to the invention, R30 may represent a hydrogen atom, a C1-C6-alkyl group, an aryl group, a C1-C6-alkoxy group, a C3-C8-alkylene-alkenyl group.
According to the invention, the compound of formula (VI) of the siloxane type may be obtained according to a method (P1).
According to the invention, the method (P1) comprises the putting into solution of the compound of formula (XV) in the presence of water, a catalyst and optionally a surfactant.
According to the invention, the catalyst may be selected from an acid catalyst, a basic catalyst or a nucleophilic catalyst.
According to the invention, the surfactant may be selected from ammonium salts or phosphonium salts comprising at least one alkyl having at least 4 carbon atoms, block copolymers such as polyoxyethylene-polyoxypropylene or polyoxyethylene alkyl ethers. Preferably, the surfactant is hexadecyl trimethylammonium bromide (CTAB), Pluronic P123, Brij 58 or Brij 35.
According to the invention, the reaction may occur with or without an organic solvent.
According to the invention, the solvent may be selected from water, alcohols comprising from 1 to 8 carbon atoms, ethyl ether, THF, DMF or DMSO.
According to the invention, the alcohols comprising from 1 to 8 carbon atoms are selected from methanol, ethanol or propan-1-ol.
According to the invention, the reaction occurs at a temperature ranging from 20 to 100° C.
According to the invention, the reaction is conducted until a gel or a precipitate is obtained and then the final material is left to age for 2 to 7 days.
According to the invention, the compound of formula (VI) may also be obtained by a method (P2).
According to the invention, the method (P2) comprises the co-hydrolysis of the compound of formula (XV) with a silica source such as tetramethylorthosilicate (TMOS) or tetraethylorthosilicate (TEOS) or with another polysilylated organosilane, such as 1,4-bistrialkoxysilylethane (BTSE:alkoxy=methoxy or ethoxy) or 1,4-bistrialkoxysilylbenzene (BTSB:alkoxy=methoxy or ethoxy).
The characteristics of the solvent, the catalyst and of the temperature shown for the method (P1) apply to the method (P2).
According to the invention, the method (P2) may give the possibility of ending up with a siloxane-silica composite of the type (VI):xSiO2 or a siloxane-silsesquioxane composite (SQ) such as a composite (VI):BTSE-SQ or a composite (VI):BTSB-SQ.
According to the invention, a composite (VI)-BTSE-SQ may be defined by the following formula:
O1.5Si—(CH2)2—SiO1.5 VI:
wherein the oxygen atom of the terminal group SiO1/2 of the compound of formula (VI) is bound to an oxygen atom of the terminal group SiO1.5 of BTSE.
According to the invention, a composite (VI)-BTSB-SQ may be defined by the following formula:
O1.5Si-Ph-SiO1.5 VI:
wherein the oxygen atom of the terminal group SiO1/2 of the compound of formula (VI) is bound to an oxygen atom of the terminal group SiO1.5 of BTSB.
According to the invention, the compound of formula (VI) may be obtained by a method (P3).
According to the invention, the method (P3) comprises co-hydrolysis of the compound of formula (XV) with a silicone source such as diethoxydimethylsilane.
The characteristics of the solvent, of the catalyst and of the temperature shown for the method (P1) apply to method (P3).
According to the invention, the method (P3) gives the possibility of ending up with a siloxane-silicone composite polymer of the type (VI); xMe2SiO.
Another object of the present invention relates to a method for preparing a compound of formula (VII) comprising the hydrolysis of a compound of formula (XVI)
The whole of the characteristics or preferences for R9, A, U, Q, V, B, a, b, c and q apply to the compound of formula (XVI).
According to the invention, R30 and R31, either identical or different, may represent a hydrogen atom, a C1-C6-alkyl group, an aryl group, a C1-C6-alkoxy group, a C3-C8-alkylene-alkenyl group.
According to the invention, the compound (VII) may be obtained by the method (P1) or (P2) applied to the compound (XVI).
According to the invention, the method (P2) may give the possibility of ending up with a siloxane-silica composite material of the type (VII); xSiO2, and a silicone-silsesquioxane (SQ) such as a composite (VII):BTSE-SQ or a composite (VII):BTSB-SQ.
Another object of the present invention relates to a method for preparing a compound of formula (VIII) comprising the hydrolysis of a compound of formula (XVII)
The whole of the characteristics or preferences for A, U, Q, V, B, a, b, c and q apply to the compound of formula (XVII).
According to the invention, R33, R34 and R35, either identical or different, may represent a hydrogen atom, a C1-C6-alkyl group, an aryl group, a C1-C6-alkoxy group, a C3-C8-alkylene-alkenyl group.
According to the invention, the compound of formula (VIII) may be obtained by the method (P1) or (P2) applied to the compound of formula (XVII).
According to the invention, the method (P2) may give the possibility of ending up with a siloxane-silica composite material of the type (VIII); xSiO2, and a silsesquioxane-silsesquioxane composite material (SQ) such as a composite (VIII):BTSE-SQ or a composite (VIII):BTSB-SQ.
The different aspects of the invention are illustrated by the examples which follow. These examples are given as an indication, without any limitation.
All the experiments were carried out by using standard Schlenk techniques under an inert atmosphere.
The liquid NMR spectra were obtained on Bruker apparatuses operating at 400 or 250 MHz, in dry CDCl3 at 298 K.
The solid NMR spectra were measured on a Varian ASX 400 apparatus.
The 1H and 13C and 29Si chemical shifts are reported in ppm relatively to Me4Si.
High resolution mass spectra were obtained by electrospray ionization.
The infrared spectra were obtained in ATR on a Perkin 100 spectrometer. The ATGs were obtained with a temperature gradient of 10° C./min.
The X-ray diffractograms were obtained at the Charles Coulomb Laboratory of Montpellier by using monochromatic CuKα radiation.
To a solution of bis(triethoxysilylpropyl)amine (12.8 g, 30.0 mmol) in THF containing 1,000 ppm of water (150 ml), calcium hydride (3.16 g, 75 mmol) and then propargyl bromide (80% in toluene, 4.28 g, 36.0 mmol) were added successively. The reaction medium was stirred for 16 h at room temperature. After evaporation of the solvents, extraction of the reaction mixture with pentane and concentration, a viscous yellow oil was obtained, and then purified by distillation under reduced pressure (130° C./2.10−2 mbar) in order to obtain the compound 1 as a colorless oil (13.2 g, 28.4 mmol). Yield: 95%.
1H NMR (250 MHz, CDCl3) δ=3.81 (q, J=7.0 Hz, 12H), 3.38 (d, J=2.3 Hz, 2H), 2.56-2.34 (m, 4H), 2.13 (t, J=2.3 Hz, 1H), 1.65-1.46 (m, 4H), 1.21 (t, J=7.0 Hz, 18H), 0.66-0.56 (m, 4H). 13C NMR (101 MHz, CDCl3) δ=79.0, 72.5, 58.4, 56.7, 41.8, 21.0, 18.4, 8.1. HRMS (ESI+):
m/z calculated for C21H46NO6Si2+: 464.2864;
m/z determined: 464.2871.
To a solution of N,N′-bis(3-triethoxysilylpropyl)ethane-1,2-diamine (4.41 g, 9.4 mmol) in THF containing 1,000 ppm of water (40 ml), calcium hydride (1.7 g, 37.5 mmol) and then propargyl bromide (80% in toluene, 3.49 g, 23.5 mmol) were added successively. The reaction mixture was stirred for 16 h at room temperature. After evaporation of the solvents, extraction of the reaction mixture with pentane and concentration, the compound 2 was obtained as a viscous oil (4.9 g, 9.0 mmol). Yield: 96%
1H NMR (250 MHz, CDCl3) δ=3.68 (q, J=7.0 Hz, 12H), 3.32 (d, J=2.2 Hz, 4H), 2.48 (s, 4H), 2.39-2.30 (m, 4H), 2.06 (t, J=2.3 Hz, 2H), 1.52-1.35 (m, 4H), 1.09 (t, J=7.0 Hz, 18H), 0.53-0.42 (m, 4H). 13C NMR (63 MHz, CDCl3) δ=78.6, 72.7, 58.2, 57.0, 51.2, 41.9, 20.7, 18.2, 7.8.
HRMS (ESI+):
m/z calculated for C26H53N2O6Si2+: 545.3442;
m/z determined: 545.3440.
A mixture of bis(triethoxysilylpropyl)amine (1.0 g, 2.3 mmol), 3-azido-1-iodopropane (0.48 g, 2.3 mmol) and potassium carbonate (0.63 g, 4.6 mmol) in acetonitrile (HPLC grade, 20 ml) was stirred for 16 h at 85° C. in a sealed tube under nitrogen. The mixture was filtered, and then the filtrate was concentrated, in order to obtain the compound 3 as a yellowish oil (1.1 g, 2.2 mmol). Yield: 93%.
1H NMR (250 MHz, CDCl3) δ=3.80 (q, J=7.0 Hz, 12H), 3.31 (t, J=6.8 Hz, 2H), 2.46 (t, J=6.9 Hz, 2H), 2.38 (t, J=6.9 Hz, 4H), 1.75-1.61 (m, 2H), 1.59-1.41 (m, 4H), 1.21 (t, J=7.0 Hz, 18H), 0.61-0.49 (m, 4H). 13C NMR (63 MHz, CDCl3) δ=58.5, 57.2, 51.1, 49.8, 26.9, 20.4, 18.4, 8.1.
HRMS (ESI+):
m/z calculated for C21H49N4O6Si2: 509.3191;
m/z determined: 509.3174.
A mixture of N,N′-bis(triethoxysilylpropyl)ethane-1,2-diamine (0.9 g, 1.9 mmol), 3-azido-1-iodopropane (0.8 g, 3.8 mmol) and of potassium carbonate (1.1 g, 7.7 mmol) in acetonitrile (HPLC grade, 15 ml) was stirred for 16 h, at 85° C., in a sealed tube under nitrogen. The mixture was filtered, and then the filtrate was concentrated in order to obtain the compound 4 as a yellowish oil (0.99 g, 1.6 mmol).
Yield: 82%.
1H NMR (250 MHz, CDCl3) δ=3.80 (q, J=7.0 Hz, 12H), 3.31 (t, J=6.8 Hz, 4H), 2.54-2.46 (m, 8H), 2.38 (t, J=6.9 Hz, 4H), 1.75-1.61 (m, 4H), 1.59-1.41 (m, 4H), 1.21 (t, J=7.0 Hz, 18H), 0.61-0.49 (m, 4H). 13C NMR (63 MHz, CDCl3) δ=58.4, 57.7, 52.6, 51.5, 49.7, 26.9, 20.5, 18.4, 8.0.
HRMS (ESI+):
m/z calculated for C26H59N8O6Si2: 635.4096;
m/z determined: 635.4089.
To a solution of bis(diethoxymethylsilylpropyl)amine (2.0 g, 4.9 mmol) in THF containing 1,000 ppm of water (20 ml), calcium hydride (0.6 g, 12.3 mmol) and then propargyl bromide (80% in toluene, 1.1 g, 7.4 mmol) were added successively. The reaction medium was stirred for 16 h, at room temperature. After evaporation of the solvents, extraction of the reaction mixture with pentane and concentration, the compound 5 was obtained as a viscous yellow oil (1.8 g, 4.6 mmol).
Yield: 93%.
1H NMR (250 MHz, CDCl3) δ=3.75 (q, J=7.0 Hz, 8H), 3.39 (d, J=2.3 Hz, 2H), 2.45 (t, J=7.5 Hz, 4H), 2.14 (t, J=2.3 Hz, 1H), 1.58-1.41 (m, 4H), 1.20 (t, J=7.0 Hz, 12H), 0.63-0.54 (m, 4H), 0.11 (s, 6H). 13C NMR (63 MHz, CDCl3) δ=78.9, 72.6, 58.2, 56.9, 41.9, 21.0, 18.5, 11.5, −4.8.
HRMS (ESI+):
m/z calculated for C19H42NO4Si2: 404.2652;
m/z: determined, 404.2648.
A mixture of bis(triethoxysilylpropyl)amine (1.0 g, 2.3 mmol), potassium carbonate (0.65 g, 4.7 mmol) and 3-(trimethylsilyl)prop-2-ynyl tosylate (0.66 g, 2.3 mmol) in acetonitrile (20 ml) was stirred for 15 hours at 85° C. in a sealed tube. After cooling to room temperature, the mixture was filtered and then the filtrate was concentrated in order to obtain the compound 6 as a yellow oil (1.2 g, 2.2 mmol). Yield: 94%.
1H NMR (400 MHz, CDCl3) δ=3.81 (q, J=7.0 Hz, 12H), 3.38 (s, 2H), 2.44 (t, J=8.0 Hz, 4H), 1.59-1.48 (m, 4H), 1.21 (t, J=7.0 Hz, 18H), 0.63-0.57 (m, 4H), 0.4 (s, 9H). 13C NMR (101 MHz, CDCl3) δ=101.5, 89.2, 58.3, 56.7, 42.9, 20.8, 18.3, 8.0, 0.1.
HRMS (ESI+):
m/z calculated for C24H54NO6Si3: 536.3259;
m/z determined: 536.3242.
The synthesis was adapted from a method described in Corriu et al. (Corriu et al., Chem. Mater. 1992, 4 (6), 1217-1224).
For this, the compound 1 of Example 1 (0.8 g: 1.7 mmol) was dissolved in absolute ethanol (6.4 ml, 108 mmol). Under strong stirring, ammonium fluoride (0.64 ml, a 1 M solution in water, 0.64 mmol) is then added with distilled water (0.34 g, 19 mmol).
The final molar ratio was: compound 1/NH4F/H2O/EtOH:1/0.38/11/63.
After 1 minute with stirring, the mixture was left at rest for 4 days at room temperature. A gel was obtained. It was milled on a filtrating plate, dried, washed with water, ethanol and then acetone, and then dried under reduced pressure (0.1 mbar) in order to obtain a pale yellow powder.
Infrared (cm−1): 880, 1025, 1390, 2820, 2888, 2930, 3290.
The compound 1 of example 1 (0.8 g: 1.7 mmol), azidomethylpyrene (0.1 g, 0.34 mmol) and sodium ascorbate (0.025 g, 0.13 mmol) were mixed in absolute ethanol (6.4 ml, 108 mmol). Under strong stirring, a mixture of ammonium fluoride (0.06 ml, 1 M solution in water, 0.06 mmol), distilled water (0.34 g, 19 mmol) and catalyst CuBr(PPh3)3 (0.06 g, 0.06 mmol) in THF (0.5 g, 6.9 mmol) was added.
The final molar ratio was: compound 1/NH4F/H2O/EtOH/azidomethylpyrene/ascorbate/Cu/THF=1:0.04:11:63:0.2:0.08:0.04:4. After 1 minute with stirring, the mixture was left for 3 days at room temperature. A gel was obtained. It was milled on a filtrating plate, dried, washed with water, ethanol and then acetone, and then dried in order to obtain a pale yellow powder.
Infrared (cm−1): 849, 880, 1025, 1295, 1390, 1590, 1640, 2820, 2888, 2930, 2970, 3290.
The synthesis was adapted from a method described in Nguyen et al. (Nguyen et al., J. Mater. Chem. 2010, 20 (19), 3910-3917).
A solution of sodium hexadecylsulfate (SHS, ABCR no. AB136610, 531 mg, 1.5 mmol), of 1 N HCl (4 mL, 4 mmol) in 36 ml of distilled water (2 mol) was brought to 60° C. The compound 1 of example 1 (0.72 g: 1.6 mmol) was then added.
The final molar ratio was: compound 1/HCl/SHS/H2O:1/2.5/1/1250.
A precipitate appeared after 2 min. After 30 min with stirring at 60° C., the mixture was cooled, filtered, dried in the oven at 50° C. for 6 h and then under reduced pressure (0.1 mbar) at room temperature, for 15 h.
Elementary analysis of the material after synthesis is the following: H: 8.1%: C: 53%: N: 2.3%: S: 6.5%.
After 24 h of continuous extraction with the Soxhlet (10 ml of 37% HCl for 200 ml of EtOH) and then drying (50° C. at atmospheric pressure, 6 h, and then 20° C. under reduced pressure, 16 h), the material was obtained in the form of a white powder.
Elementary analysis after extraction: H: 4.7%: C: 28%: N: 3.5%: S: 0%
Infrared (cm−1): 875, 1006, 1430, 2827, 2888, 2937, 2940, 3298.
NMR of the CPMAS solid:
29Si (δ, ppm): −58.3 (T2): −67.0 (T3): condensation degree: 88%.
13C (δ, ppm): 79: 75: 56: 43: 21: 11
The presence of an IR band at 3298 cm−1, as well as 13C signals at 79 ppm and 75 ppm confirm the presence of the alkyne function in the material of formula 9.
By X-ray diffraction applied to the thereby obtained material, a Bragg peak at 1.97 nm−1 (repetition distance of 3.2 nm) is obtained.
This value allows confirmation that the material appears in a mesostructured form.
By thermogravimetric analysis applied to the thereby obtained material, the following was obtained:
These values allow confirmation of the thermal stability of the obtained material.
The scanning electron microscope images showed an aggregate of microfibers. In transmission electron microscopy, curved fibers with a length from 1 to 5 μm and a diameter from 70 to 150 nm and with longitudinal porosity were characterized.
A mixture of 1-iodo-2-azidoethane (5.2 g, 30 mmol), bis-(triethoxysilylpropyl)amine (13 g, 30 mmol), potassium carbonate (8.2 g, 60 mmol) in 200 ml of acetonitrile were stirred in a sealed tube, under argon at 85° C., for 18 h. Next, the solvent was evaporated under reduced pressure, the product was extracted with pentane and then concentrated in vacuo in order to obtain the precursor 10.
1H NMR: 3.80 (q, 12H): 3.25 (t, 2H): 2.65 (t, 2H): 2.45 (t, 4H): 1.55 (q, 4H): 1.20 (t, 18H): 0.60 (t, 4H).
13C NMR: 58.3: 57.3: 53.5: 49.5: 20.4: 18.2: 7.8.
HRMS ESI+:
m/z calculated for C20H47N4O6Si2+: 495.3016,
m/z determined: 495.3034.
The precursor 10 (0.85 g: 1.7 mmol) was dissolved in absolute ethanol (6.4 ml, 108 mmol). With strong stirring, ammonium fluoride (0.32 ml, a 1M solution in water, 0.32 mmol) was then added with distilled water (0.34 g, 19 mmol). The final molar ratio was: compound 10/NH4F/H2O/EtOH:1/0.19/11/63.
After 1 minute with stirring, the mixture was left at rest for 2 days at room temperature. A gel was obtained. It was milled on a filtrating plate, dried, washed with water, with ethanol and then acetone, and then dried under reduced pressure (0.1 mbar) in order to obtain a white powder.
IR (cm−1): 2937, 2880, 2819, 2097, 1468, 1407, 1346, 1275, 1093, 1006, 917, 743, 691
The presence of an IR band at 2097 cm−1 confirms the presence of nitride functions in the material of formula 11.
The precursor 10 (0.85 g: 1.7 mmol), methyl pentynoate (0.039 g, 0.34 mmol), and sodium ascorbate (0.025 g, 0.13 mmol) were mixed in absolute ethanol (6.4 mL, 108 mmol).
With strong stirring, a mixture of ammonium fluoride (0.32 mL, 1 M solution in water, 0.32 mmol) distilled water (0.34 g, 19 mmol), and catalyst CuBr(PPh3)3 (0.06 g, 0.06 mmol) in THF (0.5 g, 6.9 mmol) were added. The final molar ratio was: compound 10/NH4F/H2O/EtOH/methyl pentynoate/ascorbate/Cu/THF:1/0.19/11/63/0.2/0.08/0.04/4.
After 1 minute of stirring, the mixture was left for 2 days at room temperature. A gel was obtained. It was milled on a filtering plate, dried, washed with water, ethanol and then acetone, and the dried in order to obtain a pale grey powder.
IR (cm−1): 2937, 2880, 2819, 2097, 1734, 1468, 1441, 1407, 1346, 1275, 1093, 1006, 917, 743, 691
The presence of an IR band at 2097 cm−1 confirms the presence of nitride functions in the material of formula 12.
The presence of an IR band at 1734 cm−1 confirms the presence of ester functions in the material of formula 12.
A solution of sodium hexadecylsulfate (SHS, ABCR cat. number AB136610, 531 mg, 1.5 mmol), of 1 N HCl (4 mL, 4 mmol) in 36 mL of distilled water (2 mol) a été portée à 60° C.
The precursor 10 (1.5 g:3 mmol) was then added. The final molar ratio was: compound 10/HCl/SHS/H2O:1/1.25/0.5/625. A precipitate appeared after 2 mins. After 30 mins with stirring at 60° C., the mixture was cooled, filtered, dried in the oven at 50° C. for 6 h and the under reduced pressure (0.1 mbar) at room temperature for 15 h.
After 24 h of continuous extraction with the Soxhlet (10 mL of 37% HCl pour 200 mL of EtOH), the powder was stirred for one night in a solution (200 mL ethanol+12 mL 28% NH4OH in water). The material was finally dried (50° C., 6 h and then under reduced pressure, 16 h), it was obtained as a white powder.
IR (cm−1): 2937, 2880, 2819, 2097, 1468, 1407, 1346, 1275, 1093, 1006, 917, 743, 691.
The compound 2 (0.16 mmol) was added with intense stirring to a mixture of CTAB (46 mg, 0.13 mmol), of distilled water (17.5 mL, 0.97 mol), of propan-1-ol (2 mL, 27 mmol) and of NH4OH (25% by mass in NH3, 0.5 mL, 6.5 mmol) heated beforehand to 50° C.
The composition of the mixture was compound 2/CTAB/propan-1-ol/NH3/H2O=1:0.78:197:40:4900
After 24 hours of stirring, the mixture was centrifuged and the precipitate was washed 3 times with ethanol and then extracted with the soxhlet with a solution of 5 mL of 12 M hydrochloric acid in 100 mL of ethanol with reflux for 48 hours.
The thereby obtained product was characterized in the following way:
IR (wavenumber in cm−1): 917, 1018, 1093, 1259, 1322, 1433, 1465, 2819, 2930, 3290.
The compound 2 (1 mmol) was added with intense stirring to a mixture of hexadecyl trimethylammonium bromide (CTAB) (0.29 g, 0.8 mmol), of distilled water (17 mL, 0.97 mol) and NH4OH (25% by mass, 2.3 mL, 30 mmol) heated to 70° C.
The composition of the mixture was: compound 2/CTAB/NH3/H2O=1:0.79:30:1500
After 24 hours of stirring, the water was evaporated in order to obtain the material (14). The surfactant was extracted by washing the powder with the soxhlet with a solution of 5 mL of 12 M hydrochloric acid in 100 mL of ethanol with reflux for 48 hours.
The thereby obtained product was characterized in the following way:
IR (wavenumber in cm−1): 1018, 1093, 1259, 1322, 1433, 1465, 2819, 2930, 3290
A mixture of hexadecyl trimethylammonium bromide (CTAB) (0.1 g, 0.28 mmol), of distilled water (35 mL, 2 mol), ammonium hydroxide (28%, 0.84 mL, 13 mmol) and propan-1-ol (4 mL, 53 mmol) was intensely stirred for 30 minutes a 50° C. Next, the compound (1) (0.2 mL, 0.4 mmol) was added and the mixture was stirred at 50° C. for 12 h.
The composition of the mixture was 1/CTAB/propan-1-ol/NH4OH/eau=1:0.68:133:32:4660
After centrifugation (16500 rpm, 20 min), the material (7) was recovered and washed with water and ethanol and then dried under reduced pressure. The surfactant was extracted by washing the powder with the soxhlet with a solution of 5 mL of 12 M hydrochloric acid in 100 mL of ethanol with reflux for 48 hours.
The thereby obtained product was characterized in the following way:
IR (wavenumber in cm−1): 744, 917, 1020, 1096, 1206, 1447, 2127 (alkyne), 2943, 3284.
Scanning electron microscope (SEM) images show that the material 7 is in the form of spherical nanoparticles, the diameter of which ranges from 100 to 180 nm.
Transmission electron microscope (TEM) images confirm that the material 7 is in the form of spherical nanoparticles, the diameter of which ranges from 100 to 180 nm.
The dynamic light scattering diagram (DLS) shows a very narrow distribution of the size of nanoparticles, of about 160 nm.
The nitrogen adsorption isotherm for analyzing the texture of the material 7 was obtained for:
| Number | Date | Country | Kind |
|---|---|---|---|
| 1256545 | Jul 2012 | FR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2013/064376 | 7/8/2013 | WO | 00 |
