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Soluble Main-Chain Azobenzene Polymers via Thermal 1,3-Dipolar Cycloaddition: Preparation and Photoresponsive Behavior
被引:56
作者:
Xue, Xiaoqiang
[1
]
Zhu, Jian
[1
]
Zhang, Zhengbiao
[1
]
Zhou, Nianchen
[1
]
Tu, Yingfeng
[1
]
Zhu, Xiulin
[1
]
机构:
[1] Soochow Univ, Coll Chem Chem Engn & Mat Sci, Key Lab Organ Synth Jiangsu Prov, Suzhou 215123, Peoples R China
关键词:
SURFACE-RELIEF GRATINGS;
NONLINEAR-OPTICAL POLYMERS;
CLICK CHEMISTRY;
HYPERBRANCHED POLYTRIAZOLES;
PHOTOINDUCED BIREFRINGENCE;
RAFT POLYMERIZATION;
BLOCK-COPOLYMERS;
AZO-POLYMERS;
FILMS;
CHROMOPHORE;
D O I:
10.1021/ma902671m
中图分类号:
O63 [高分子化学(高聚物)];
学科分类号:
070305 ;
080501 ;
081704 ;
摘要:
Two soluble polymers containing azobenzene chromophore in main chain were successfully synthesized from alpha-azide, omega-alkyne A-B type azobenzene monomers, 3'-ethynylphenyl[4-hexoxyl(2-azido-2-inethylpropion<tte)phcnyl]azobenzene (EHPA) and 3'-etllytlylphenyl[4-(4-azidobutoxy)phenyl]azobellzene (EAPA), via thermal 1,3-dipolar cycloaddition in bulk, Compared to the polymers obtained from Cu(I)-catalyzed 1,3-dipolar cycloaddition ("click" chemistry), the polymers obtained from thermal 1,3-dipolar cycloaddition showed good solubility in common solvents like CHCl3 and THF and good film-forming ability. The polymers were thermally stable LIP to 330 degrees C. The structures of the main-chain azobenzene polymers were characterized by gel permeation chromatography (GPC), H-1 NMR, UV-vis, and FT-IR spectra. The photoinduced trans-cis isomerization of the polymers in chloroform (CHCl3) solution was examined. With illumination of linearly polarized Kr+ laser beam at 413.1 runt, surface relief gratings formed oil PEHPA2 spin-coating films were investigated.
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页码:2704 / 2712
页数:9
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