Tunable morphologies, structure and unusual responsive thermochromism of polydiacetylene supramolelular assemblies

Tunable morphologies, structure and unusual responsive thermochromism of polydiacetylene supramolelular assemblies
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聚二乙炔超分子组装体的可调节形态、结构和异常响应热致变色

DOI:
10.1016/j.matlet.2008.05.057
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发表时间:
2008-09
期刊:
影响因子:
3
通讯作者:
You, Xian
You, Xian
中科院分区:
材料科学3区
文献类型:
--
作者:
Yu, Xiaowu;Zou, Gang;Ye, Qiang;Zhang, Qijin;You, Xian

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通过透射电子显微镜(TEM)和X射线衍射(XRD)详细研究了偶氮苯介晶取代的聚二乙炔(PDA),其自组装成高度有序的层状结构和微米尺寸的聚集体结构。二乙炔单体的可调节分子结构可以控制超分子组装体的分子结构,从而改变 PDA 薄膜的形态和堆叠结构。该薄膜在室温下形成蓝相,但经历众所周知的热致变色转变,产生红相。由于强分子间相互作用(π-π堆积),偶氮苯取代的 PDA 组件表现出增强的热稳定性,并在更高的色变临界温度下(105°C 完全可逆热致变色转变,150°C 部分可逆热致变色转变)表现出可逆色变。
Azobenzene mesogen-substituted polydiacetylene (PDA) which self-assembled into highly ordered lamellar structure and micrometer-sized aggregates structures were investigated in detail by transmission electron microscopy (TEM) as well as X-ray diffraction (XRD). The adjustable molecular structure of diacetylenic monomers allows control of molecular architecture of the supramolecular assembly, resulting in modification of morphology and stacking structure of PDA films. The films form blue phase at room temperature but undergo the well-known thermochromic transition which produce red phase. Due to the strong intermolecular interaction (π–π stacking), azobenzene-substituted PDA assemblies shows the enhanced thermal stability, and a reversible chromatic transition at a much higher critical temperature of chromatic transition (105 °C for completely reversible thermochromic transition and 150 °C for partially reversible thermochromic transition).
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发表时间: 1999-03
期刊: Angewandte Chemie
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