Cyclic side-chain phenylazo naphthalene polymers: enhanced fluorescence emission and surface relief grating formation.
Cyclic side-chain phenylazo naphthalene polymers: enhanced fluorescence emission and surface relief grating formation.
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DOI：
10.1002/marc.201200415
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发表时间：
2012-11
影响因子：
4.6
通讯作者：
Hao-Yu Zhang;Nianchen Zhou;Xing Zhu;Xinrong Chen;Zhengbiao Zhang;Wei Zhang;Jian Zhu;Zhijun Hu-Zhijun
中科院分区：
文献类型：
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作者：
Hao-Yu Zhang;Nianchen Zhou;Xing Zhu;Xinrong Chen;Zhengbiao Zhang;Wei Zhang;Jian Zhu;Zhijun Hu-Zhijun
通过原子转移自由基聚合（ATRP）和铜催化的叠氮/炔环加成“点击”反应，成功合成了侧链含苯偶氮萘发色团的环状聚合物（cyclic-PAzoMMA），并通过GPC、1HNMR、FTIR和MALDI-TOF质谱进行了表征。环状PAzoMMA的玻璃化转变温度高于相同分子量的线性PAzoMMA。有趣的是，环状PAzoMMA表现出更深的调制深度（M.D.）SRG诱导的光致双折射值较大，荧光发射增强，荧光寿命较长。
Well-defined cyclic-polymers (cyclic-PAzoMMAs), bearing side-chain phenylazo naphthalene chromophore, were successfully synthesized by the combination of atom transfer radical polymerization (ATRP) and copper(I)-catalyzed azide/alkyne cycloaddition "click" reaction, as verified by GPC, (1) H NMR, FTIR, and MALDI-TOF mass spectrometry. The cyclic-PAzoMMA showed higher glass transition temperatures than the linear-PAzoMMA with the same molecular weight. Interestingly, the cyclic-PAzoMMA exhibited deeper modulation depth (M.D.) induced by SRG, larger value of the photoinduced birefringence, increased fluorescence emission, and longer fluorescence lifetime in comparison with its linear counterpart.