Claims
- 1. A fluorescent conjugated polymer-surfactant composition comprising:an ionic conjugated polymer having fluorescent properties, complexed with an oppositely charged surfactant, wherein the complex is characterized by at least one enhanced photophysical property.
- 2. A fluorescent conjugated polymer-surfactant composition according to claim 1, wherein the enhanced photophysical property is selected from an increased fluorescence quantum efficiency, an excitation wavelength independent fluorescence emission spectrum, a narrowed and red-shifted absorption spectrum, or fluorescence decay kinetics described by single exponential decay.
- 3. A fluorescent conjugated polymer-surfactant composition according to claim 1, wherein the surfactant comprises surfactant molecules having an average alkyl chain length ranging from about 8 to about 16 carbons.
- 4. A fluorescent conjugated polymer-surfactant composition according to claim 1, wherein the surfactant comprises surfactant molecules having an average alkyl chain length ranging from about 10 to about 14 carbons.
- 5. A fluorescent conjugated polymer-surfactant composition according to claim 1, wherein the surfactant comprises dodecyltrimethylammonium bromide.
- 6. A fluorescent conjugated polymer-surfactant composition according to claim 1, wherein the polymer comprises at least one fluorescent ionic conjugated polymer selected from substituted and unsubstituted forms of poly(phenylene vinylene), poly(silyl-phenylene vinylene), poly(thienylene vinylene), poly(naphthalene vinylene), poly(quinoline vinylene), poly(pyridine vinylene), poly(fluorene), poly(thiophene), or derivatives thereof.
- 7. A fluorescent conjugated polymer-surfactant composition according to claim 1, wherein the ratio of surfactant molecules per monomer repeat unit of polymer is at least 1:100.
- 8. A fluorescent conjugated polymer-surfactant composition according to claim 1, wherein the ratio of surfactant molecules per monomer repeat unit of polymer is at least 1:1.
- 9. A fluorescent conjugated polymer-surfactant composition according to claim 1, wherein the ratio of surfactant molecules per monomer repeat unit of polymer is at least 1:3.
- 10. A fluorescent conjugated polymer-surfactant composition according to claim 1, wherein the ratio of surfactant molecules per monomer repeat unit of polymer is at least 1:1.
- 11. A fluorescent conjugated polymer-surfactant composition comprising:an ionic conjugated polymer having fluorescent properties, complexed with an oppositely charged surfactant comprising surfactant molecules having an average alkyl chain length ranging from about 8 to about 16 carbons, wherein the ratio of surfactant molecules per monomer repeat unit of polymer ranges from about 1:100 to about 1:1, and wherein the complex is characterized by at least one enhanced photophysical property.
- 12. A fluorescent conjugated polymer-surfactant composition according to claim 11, wherein the enhanced photophysical property is selected from an increased fluorescence quantum efficiency, an excitation wavelength independent fluorescence emission spectrum, a narrowed and red-shifted absorption spectrum, or fluorescence decay kinetics described by single exponential decay.
- 13. A fluorescent conjugated polymer-surfactant composition according to claim 12, wherein the polymer comprises at least one fluorescent ionic conjugated polymer selected from substituted and unsubstituted forms of poly(phenylene vinylene), poly(silyl-phenylene vinylene), poly(thienylene vinylene), poly(naphthalene vinylene), poly(quinoline vinylene), poly(pyridine vinylene), poly(fluorene), poly(thiophene), or derivatives thereof.
- 14. A fluorescent conjugated polymer-surfactant composition according to claim 12, wherein the surfactant comprises surfactant molecules having an average alkyl chain length ranging from about 10 to about 14 carbons.
- 15. A fluorescent conjugated polymer-surfactant composition according to claim 14, wherein the polymer comprises at least one fluorescent ionic conjugated polymer selected from substituted and unsubstituted forms of poly(phenylene vinylene), poly(silyl-phenylene vinylene), poly(thienylene vinylene), poly(naphthalene vinylene), poly(quinoline vinylene), poly(pyridine vinylene), poly(fluorene), poly(thiophene), or derivatives thereof.
- 16. A fluorescent conjugated polymer-surfactant composition comprising:an ionic conjugated polymer comprising 2-methoxy-5-propyloxysulfonato phenylene vinylene having fluorescent properties, complexed with an oppositely charged surfactant comprising dodecyltrimethylammonium bromide, wherein the ratio of surfactant molecules per monomer repeat unit of polymer ranges from about 1:100 to about 1:1, and wherein the complex is characterized by the enhancement of at least one photophysical property selected from a fluorescence quantum efficiency increase ranging from 5 to 20 fold, an excitation wavelength independent fluorescence emission spectrum, a narrowed and red-shifted absorption spectrum, or fluorescence decay kinetics described by single exponential decay.
- 17. A method of preparing a fluorescent conjugated polymer-surfactant composition comprising:obtaining a solution comprising an ionic conjugated polymer having fluorescent properties in polar solvent; adding an effective amount of oppositely charged surfactant to the polymer solution to form a polymer-surfactant complex in solution, wherein said complex exhibits at least one enhanced photophysical property compared to the neat polymer.
- 18. A method of preparing a fluorescent conjugated polymer-surfactant composition according to claim 17, wherein the surfactant comprises surfactant molecules having an average alkyl chain length ranging from about 8 to about 16 carbons.
- 19. A method of preparing a fluorescent conjugated polymer-surfactant composition according to claim 17, wherein the surfactant comprises surfactant molecules having an average alkyl chain length ranging from about 10 to about 14 carbons.
- 20. A method of preparing a fluorescent conjugated polymer-surfactant composition according to claim 17, wherein the surfactant comprises dodecyltrimethylammonium bromide.
- 21. A method of preparing a fluorescent conjugated polymer-surfactant composition according to claim 17, wherein the effective amount of surfactant produces a ratio of surfactant molecules per monomer repeat unit of polymer of at least 1:100.
- 22. A method of preparing a fluorescent conjugated polymer-surfactant composition according to claim 17, wherein the effective amount of surfactant produces a ratio of surfactant molecules per monomer repeat unit of polymer of at least 1:10.
- 23. A method of preparing a fluorescent conjugated polymer-surfactant composition according to claim 17, wherein the effective amount of surfactant produces a ratio of surfactant molecules per monomer repeat unit of polymer of at least 1:3.
- 24. A method of preparing a fluorescent conjugated polymer-surfactant composition according to claim 17, wherein the effective amount of surfactant produces a ratio of surfactant molecules per monomer repeat unit of polymer of at least 1:1.
- 25. A method of preparing a fluorescent conjugated polymer-surfactant composition according to claim 17, wherein the effective amount of surfactant produces a solid precipitate.
- 26. A method of preparing a fluorescent conjugated polymer-surfactant composition according to claim 17, wherein the polymer comprises at least one fluorescent ionic conjugated polymer selected from substituted and unsubstituted forms of poly(phenylene vinylene), poly(silyl-phenylene vinylene), poly(thienylene vinylene), poly(naphthalene vinylene), poly(quinoline vinylene), poly(pyridine vinylene), poly(fluorene), poly(thiophene), or derivatives thereof.
- 27. A method of preparing a fluorescent conjugated polymer-surfactant composition according to claim 17, wherein the polymer comprises 2-methoxy-5-propyloxysulfonato phenylene vinylene.
- 28. A method of preparing a fluorescent conjugated polymer-surfactant composition according to claim 25, further comprising the step of recovering the solid precipitate.
- 29. A method of preparing a fluorescent conjugated polymer-surfactant composition according to claim 28, further comprising the steps of:dissolving the recovered precipitate in organic solvent; and coating the precipitate on a substrate to form a thin film of polymer-surfactant complex.
- 30. A method of preparing a fluorescent conjugated polymer-surfactant composition according to claim 29, wherein the precipitate is coated via spin coating methods.
- 31. A method of preparing a fluorescent conjugated polymer-surfactant composition according to claim 29, wherein the precipitate is coated via casting methods.
- 32. A method of preparing a fluorescent conjugated polymer-surfactant composition comprising the steps of:obtaining a solution comprising an ionic conjugated polymer having fluorescent properties in polar solvent; adding an effective amount of oppositely charged surfactant to the polymer solution to form a polymer-surfactant complex in solution, wherein the surfactant comprises surfactant molecules having an average alkyl chain length ranging from about 8 to about 16 carbons, wherein the effective amount of surfactant produces a ratio of surfactant molecules per monomer repeat unit of polymer ranging from about 1:100 to about 1:1, and wherein said complex exhibits at least one enhanced photophysical property compared to the neat polymer.
- 33. A method of preparing a fluorescent conjugated polymer-surfactant composition according to claim 32, wherein the polymer comprises at least one fluorescent ionic conjugated polymer selected from substituted and unsubstituted forms of poly(phenylene vinylene), poly(silyl-phenylene vinylene), poly(thienylene vinylene), poly(naphthalene vinylene), poly(quinoline vinylene), poly(pyridine vinylene), poly(fluorene), poly(thiophene), or derivatives thereof.
- 34. A method of preparing a fluorescent conjugated polymer-surfactant composition according to claim 32, wherein the surfactant comprises surfactant molecules having an average alkyl chain length ranging from about 10 to about 14 carbons.
- 35. A method of preparing a fluorescent conjugated polymer-surfactant composition according to claim 34, wherein the polymer comprises at least one fluorescent ionic conjugated polymer selected from substituted and unsubstituted forms of poly(phenylene vinylene), poly(silyl-phenylene vinylene), poly(thienylene vinylene), poly(naphthalene vinylene), poly(quinoline vinylene), poly(pyridine vinylene), poly(fluorene), poly(thiophene), or a derivative thereof.
- 36. A method of preparing a fluorescent conjugated polymer-surfactant composition comprising the acts of:obtaining a solution comprising an ionic conjugated polymer comprising 2-methoxy-5-propyloxysulfonato phenylene vinylene having fluorescent properties in polar solvent; adding an effective amount of oppositely charged surfactant comprising dodecyltrimethylammonium bromide to the polymer solution to form the polymer-surfactant composition in solution, wherein the effective amount of surfactant produces a ratio of surfactant molecules per monomer repeat unit of polymer ranging from about 1:100 to about 1:1, and wherein said composition exhibits at least one enhanced photophysical property compared to the neat polymer.
GOVERNMENT RIGHTS
This invention was made with Government support under Contract Number W-7405-ENG-36 awarded by the United States Department of Energy to The Regents of the University of California. The Government has certain rights in the invention.
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