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Conjugated polymers containing phenothiazine moieties in the main chain
Author(s) -
Liu Yingliang,
Li Jianghui,
Cao Huayu,
Qu Bo,
Chen Zhijian,
Gong Qihuang,
Xu Shengang,
Cao Shaokui
Publication year - 2006
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.728
Subject(s) - polymer , condensation polymer , tetrahydrofuran , materials science , thermogravimetric analysis , conjugated system , gel permeation chromatography , polymer chemistry , phenylene , phenothiazine , poly(p phenylene) , organic chemistry , chemistry , solvent , medicine , pharmacology , composite material
Several conjugated polymers containing phenothiazine moieties in the main chain were synthesized by Knovenagel or Wittig condensations. The polymers were identified and characterized by 1 H‐NMR, IR, gel permeation chromatography (GPC), thermogravimetric analysis (TGA), UV‐vis and fluorescent (FL) spectra. Results indicated that the m ‐polymer, which was prepared from the polycondensation of N ‐octyl‐3,7‐diformylphenothiazine with m ‐phenylene diacetonitrile, is the most thermally stable one in all the polymers synthesized. While, the p ‐polymer, which was prepared from the polycondensation of N ‐octyl‐3,7‐diformylphenothiazine with p ‐phenylene diacetonitrile, is the most thermally instable one. The introduction of a cyano group made the absorption and emissive maxima red‐shift from 429 and 537 nm for the Ph‐polymer to 465 and 597 nm for the p ‐polymer respectively. The quinoid structure formation allows the p ‐polymer to have a lower band gap than any other polymers. Emissive spectra of all these polymers in tetrahydrofuran (THF) solution have a narrow half‐peak width. Copyright © 2006 John Wiley & Sons, Ltd.