FLUORESCENCE OF PERYLENE-CONTAINING AND NAPHTHALENE-CONTAINING POLYIMIDES - EVIDENCE OF MOLECULAR AGGREGATION AND CHAIN COILING IN CHLOROFORM SOLUTION

被引:20
作者
GHASSEMI, H
ZHU, JH
机构
[1] MCGILL UNIV,PULP & PAPER RES CTR,MONTREAL,PQ H3A 2K6,CANADA
[2] MCGILL UNIV,DEPT CHEM,MONTREAL,PQ H3A 2K6,CANADA
关键词
POLYIMIDES; FLUORESCENCE; MOLECULAR AGGREGATION; CHARGE TRANSFER COMPLEX;
D O I
10.1002/polb.1995.090331108
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Fluorescence of several new polyimides in which neighboring imides are linked by a N-N bond was examined in chloroform solutions. For the naphthalene-containing polyimide 1, analysis of the emission, excitation, and absorption spectra at different concentrations showed the existence of a ground-state intermolecular charge transfer (CT) complex due to chain association and aggregation. For the perylene-containing polyimides 3-6, the fluorescence was characterized by a low energy band superimposed on the normal perylene-diimide bands. This was interpreted as arising from a CT interaction between electron donor-acceptor pairs on the polymers backbone of the same chain, revealing certain degrees of chain coiling of these polymers in solution. (C) 1995 John Wiley & Sons, Inc.
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页码:1633 / 1639
页数:7
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