High-Density Liquid-Crystalline Azobenzene Polymer Brush Attained by Surface-Initiated Ring-Opening Metathesis Polymerization

被引：37
|
作者：
Haque, Hafiz Ashraful [1 ]
Kakehi, Soutarou [1 ]
Hara, Mitsuo [1 ]
Nagano, Shusaku [2 ,3 ]
Seki, Takahiro [1 ]
机构：
[1] Nagoya Univ, Grad Sch Engn, Dept Mol Design & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan
[2] Nagoya Univ, Venture Business Lab, Chikusa Ku, Nagoya, Aichi 4648603, Japan
[3] Japan Sci & Technol Agcy PRESTO, Nagoya, Aichi, Japan
来源：
LANGMUIR | 2013年 / 29卷 / 25期
基金：
日本科学技术振兴机构;
关键词：
RADICAL POLYMERIZATION; ALKYLIDENE COMPLEXES; CROSS-METATHESIS; FILM; CYCLOPOLYMERIZATION; PHOTOALIGNMENT; SILICON; SYSTEMS;
D O I：
10.1021/la4002847
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
High-density polynorbornene azobenzene liquid-crystalline brushes are synthesized on quartz substrates by surface-initiated ring-opening metathesis polymerization (SI-ROMP) using Grubbs third-generation catalyst. The grafting process is controlled over the thickness of the brush from a solid-supported substrate in a stoichiometric manner. A highly ordered liquid-crystal arrangement was formed for such brushes as revealed by spectroscopic measurements and grazing angle X-ray diffraction analysis. Marked features of this method in the structure and photoalignment behavior are unveiled by comparison with brushes made by surface-initiated atom-transfer radical polymerization (SI-ATRP).
引用
收藏
页码：7571 / 7575
页数：5
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