ISSN:
0009-2940
Schlagwort(e):
Copolymers
;
Electrical conductivity
;
Azo compounds
;
Tellurides, organo
;
Telluration
;
Chemistry
;
Inorganic Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
Previously unknown alt-copoly(telluro-1,4-phenylene/azo-1,4-phenylene) and related polymers were synthesized by several different approaches, which include a) reductive polymerization of bis(4-nitrophenyl) tellurides with zinc; b) oxidative polymerization of bis(4-aminophenyl) telluride using a CuI/CuII redox system as catalyst under oxygen; c) electrochemical polymerization of bis(4-amino-3,5-dimethylphenyl) telluride; d) condensation polymerization of 1,4-dinitrosobenzene with bis(4-aminophenyl) telluride Te, Te-dichloride, and e) condensation polymerization of bis(4-nitrophenyl) telluride with bis(4-aminophenyl) telluride in the presence of sodium hydroxide. The polymers obtained were characterized by elemental analysis, 13C-CPMAS NMR, IR and UV-vis spectroscopy, GPC, and inherent viscosity measurements, and their properties were examined, particularly their electrical conductivity. The electrical conductivities of the new polymers 9b c, and 10 were shown to increase from below 10-7 up to 10-5 ∽ 10-2 S cm-1 upon bromine doping in spite of their formally interrupted conjugation structure.
Zusätzliches Material:
2 Tab.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/cber.19951280708
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