Synthesis and characterization of polymers containing in the chain backbone carbazoles substituted with two acceptor groups as nonlinear optical chromophores

被引：107

作者：

Zhang, YD ^{[1
]}

Wang, LM ^{[1
]}

Wada, T ^{[1
]}

Sasabe, H ^{[1
]}

机构：

[1] RIKEN,INST PHYS & CHEM RES,FRONTIER RES PROGRAM,LAB NANO PHOTON MAT,WAKO,SAITAMA 35101,JAPAN

来源：

MACROMOLECULES | 1996年 / 29卷 / 05期

关键词：

D O I：

10.1021/ma950585v

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Polymers containing in the chain backbone carbazoles substituted with two acceptor groups as nonlinear optical chromophores have been synthesized from 3,6-diformyl-9-heptylcarbazole and bis(cyanoacetate) by the Knoevenagel polycondensation. A one-stage polycondensation was carried out in tetrahydrofuran (THF) solution to yield a carbazole main-chain polymer with low molecular weight in low yield. A two-stage polycondensation first carried out in THF and followed by a solid-state polycondensation yielded a carbazole main-chain polymer with high molecular weight in high yield. Thin films of polymers with good optical quality could be obtained from their chloroform solutions by spin-coating. After electric poling, the films exhibited reasonable second-order nonlinear optical responses and the large off-diagonal tensor components.

引用

页码：1569 / 1573

页数：5

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