Click modification of azo-containing polyurethanes through polymer reaction: Convenient, adjustable structure and enhanced nonlinear optical properties

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• 作者：Zhong'an Li ; Wenbo Wu ; Pan Hu ; Xiaojun Wu ; Gui Yu ; Yunqi Liu ; Cheng Ye ; Zhen Li ; Jingui Qin
• 关键词：Nonlinear optical polyurethanes ; Post-functionalization ; Click chemistry ; Synthesis ; Isolation groups ; Structural modification
• 刊名：Dyes and Pigments
• 出版年：2009
• 出版时间：June 2009
• 年：2009
• 卷：81
• 期：3
• 页码：264-272
• 全文大小：420 K

文摘

Eight novel polyurethanes with adjustable structures were prepared from two basic polymers; the compounds displayed good solubility in common organic solvents and high thermal stability. The presence of terminal alkyne moieties further improved the thermal stability of the polymers. The resonant d₃₃ values of the polymers could be improved up to 1.55 times by attaching suitable isolation spacers, with the achieved highest d₃₃ value to be 94.4 pm/V.