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Self‐Assembly of Azobenzene Derivatives into Organogels and Photoresponsive Liquid Crystals
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2018-03-30 , DOI: 10.1002/asia.201800019
Hongyan Wang 1 , Yi Han 1 , Wei Yuan 1 , Mengjiao Wu 1 , Yulan Chen 1
Affiliation  

A new class of coil–rod–coil molecules with an azobenzene core was synthesized. They were found to form robust organogels in several organic solvents. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), FTIR spectroscopy, UV/Vis absorption spectroscopy, 1H NMR spectroscopy, and X‐ray diffraction (XRD) revealed that in these organogels, the molecules self‐assembled into a nanofiber network with an H‐type aggregation mode under the joint effect of π–π stacking, intermolecular hydrogen bonding, and van der Waals forces. Interestingly, the incorporation of the azobenzene mesogene into the rigid core led to photoisomerizable liquid crystal materials, which exhibited quick responsiveness to light and temperature, along with the transcis transition stimulated by UV light and heating.

中文翻译:

偶氮苯衍生物自组装成有机凝胶和光敏液晶

合成了一类新型的带有偶氮苯核的线圈-棒-线圈分子。发现它们可以在几种有机溶剂中形成坚固的有机凝胶。扫描电子显微镜(SEM),透射电子显微镜(TEM),原子力显微镜(AFM),FTIR光谱,UV / Vis吸收光谱,1 H NMR光谱和X射线衍射(XRD)显示,在这些有机凝胶中,分子在π–π堆积,分子间氢键和范德华力的共同作用下,以H型聚集模式自组装成纳米纤维网络。有趣的是,将偶氮苯介基因掺入刚性核导致了可光致异构化的液晶材料,该材料对光和温度表现出快速的响应性,并且反式-紫外线和加热激发顺式跃迁。
更新日期:2018-03-30
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