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Novel Aromatic Azopolymers with Regularly Interposed Tellurium Atoms in the Backbone
Author(s) -
Suzuki Hitomi,
Nakamura Tohru,
Seki Kenji
Publication year - 1995
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19951280708
Subject(s) - chemistry , polymerization , telluride , tellurium , polymer chemistry , polymer , condensation polymer , phenylene , organic chemistry
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 Cu I /Cu II 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, 13 C‐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.