A soluble blue-light emitting polymer,Poly(9,9-dihexylfluorene),was prepared by using the oxidative polymerization method.The monomer,9,9-dihexylfluorene,was prepared in a DMSO/benzene mixture with solid KOH as cataly...A soluble blue-light emitting polymer,Poly(9,9-dihexylfluorene),was prepared by using the oxidative polymerization method.The monomer,9,9-dihexylfluorene,was prepared in a DMSO/benzene mixture with solid KOH as catalyst and the product was purified by chromatography with ethyl ether/n-hexane (5/95) as the eluant. Poly(9,9-dihexylfluorene) was synthesized by chemical polymerization utilizing FeCl 3 as an oxidizing agent under argon atmosphere at room temperature for three days.Its structure and properties were characterized by FTIR, 1H-NMR,TGA,GPC,UV-Vis and photoluminescence spectra.The experimental results showed that the molecular weight of the polymer measured with GPC was M w/M n =27692/24476.The thermal degradation temperature (weight loss 5%) of the polymer was over 400℃ either in air, or in Ar.The polymer was found to be fusible at high temperature and soluble in most common organic solvents,such as chloroform,tetrahydrofuran and dichlomethane.Both in solution and film state,the polymer shows strong fluorescent excitation characteristics.The peak wavelength of its photoluminescence in chloroform solution was around 420 nm excited at 320 nm.The polymer can be processed as film by a solution-casting method and shows unique blue light emitting properties,and may be widely used in electronuminescent devices as blue-light emitting diodes and polymer lasers.展开更多
A kind of reactive inorganic polymer-poly(dichloro)phosphazene was prepared by ring-opening polymerization at a high temperature. Then a new conductive polyphosphazene containing pyrrole groups was synthesized by nucl...A kind of reactive inorganic polymer-poly(dichloro)phosphazene was prepared by ring-opening polymerization at a high temperature. Then a new conductive polyphosphazene containing pyrrole groups was synthesized by nucleophilic reaction between the inorganic polymer and sodium salts of N-hydroxyethylpyrrole. The chemical structure and properties of the polymers were characterized by 1H, 31P NMR, FTIR, DSC, TGA and GPC. The experimental results indicate that the molecular weights of pyrrole-containing soluble polymer are M n=4.1×10 5, M w=9.2×10 5( M w/ M n=2.24) and the T g is 237 K. A high qulity film was obtained from the soluble polymer through spin-coating method. Using FeCl 3 as oxidiant, the polymer film underwent crosslinking reaction to form conjugated polypyrrole. After the oxidation reaction, the color of polymer film turned into light black from almost transparent and the conductivity was determined to be 1.7×10 -5 S/cm, it is 1×10 5 times greater than that of the original film. The crosslinked polymer shows a high thermal stability.展开更多
文摘A soluble blue-light emitting polymer,Poly(9,9-dihexylfluorene),was prepared by using the oxidative polymerization method.The monomer,9,9-dihexylfluorene,was prepared in a DMSO/benzene mixture with solid KOH as catalyst and the product was purified by chromatography with ethyl ether/n-hexane (5/95) as the eluant. Poly(9,9-dihexylfluorene) was synthesized by chemical polymerization utilizing FeCl 3 as an oxidizing agent under argon atmosphere at room temperature for three days.Its structure and properties were characterized by FTIR, 1H-NMR,TGA,GPC,UV-Vis and photoluminescence spectra.The experimental results showed that the molecular weight of the polymer measured with GPC was M w/M n =27692/24476.The thermal degradation temperature (weight loss 5%) of the polymer was over 400℃ either in air, or in Ar.The polymer was found to be fusible at high temperature and soluble in most common organic solvents,such as chloroform,tetrahydrofuran and dichlomethane.Both in solution and film state,the polymer shows strong fluorescent excitation characteristics.The peak wavelength of its photoluminescence in chloroform solution was around 420 nm excited at 320 nm.The polymer can be processed as film by a solution-casting method and shows unique blue light emitting properties,and may be widely used in electronuminescent devices as blue-light emitting diodes and polymer lasers.
文摘A kind of reactive inorganic polymer-poly(dichloro)phosphazene was prepared by ring-opening polymerization at a high temperature. Then a new conductive polyphosphazene containing pyrrole groups was synthesized by nucleophilic reaction between the inorganic polymer and sodium salts of N-hydroxyethylpyrrole. The chemical structure and properties of the polymers were characterized by 1H, 31P NMR, FTIR, DSC, TGA and GPC. The experimental results indicate that the molecular weights of pyrrole-containing soluble polymer are M n=4.1×10 5, M w=9.2×10 5( M w/ M n=2.24) and the T g is 237 K. A high qulity film was obtained from the soluble polymer through spin-coating method. Using FeCl 3 as oxidiant, the polymer film underwent crosslinking reaction to form conjugated polypyrrole. After the oxidation reaction, the color of polymer film turned into light black from almost transparent and the conductivity was determined to be 1.7×10 -5 S/cm, it is 1×10 5 times greater than that of the original film. The crosslinked polymer shows a high thermal stability.
