Fabrication and photoresponse of supramolecular liquid-crystalline microparticles.
Fabrication and photoresponse of supramolecular liquid-crystalline microparticles.
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DOI：
10.1021/am2001289
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发表时间：
2011-03
影响因子：
9.5
通讯作者：
Haifeng Yu;Hui Liu;Takaomi Kobayashi
中科院分区：
文献类型：
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作者：
Haifeng Yu;Hui Liu;Takaomi Kobayashi
超分子液晶聚合物微粒的制备通过一个简单的相反转方法与氢键之间的形成偶氮吡啶聚合物和一系列的二羧酸化合物相结合。通过改变二元酸的分子长度，研究了它们的表面形貌和相行为，并观察了它们在紫外光照射下的光响应行为。发生光致变形的超分子组装的微粒显示LC相，而没有观察到的形态变化的微粒表现出无定形或结晶。超分子液晶微粒的光响应行为是由光致液晶相转变为各向同性相。
Supramolecular liquid-crystalline polymer microparticles were fabricated by combining a simple phase reversion method with hydrogen-bonding formation between an azopyridyl polymer and a series of dicarboxylic acid compounds. Their surface morphologies and phase behaviors were studied by changing the molecular length of the diacids, and then their photoresponsive behaviors were observed upon UV irradiation. Photoinduced deformation occurred for the supramolecularly assembled microparticles showing LC phases, whereas no changes in morphologies were observed for microparticles exhibiting amorphous or crystalline. The photoinduced LC-to-isotropic phase transition were responsible for the light-responsive behaviors of the supramolecular liquid-crystalline microparticles.