Solvent-dependent self-assembly and morphological transition of low-molecular-weight azobenzene organogel
作者:Zhiwei Zhang、Shaoze Zhang、Junji Zhang、Liangliang Zhu、Dahui Qu
DOI:10.1016/j.tet.2017.05.027
日期:2017.8
A novel low molecular weight organogelator (LMOG) containing an azobenzene group has been designed and synthesized. Stable gels could be formed in various organic solvents. UV–Vis spectroscopy indicated that the sol-gel transition of the organogels could be reversibly tuned by UV/visible light irradiations. Importantly, scanning electron microscopy (SEM) revealed that the characteristic gelation morphologies
设计并合成了一种新型的含偶氮苯基的低分子量有机胶凝剂(LMOG)。稳定的凝胶可以在各种有机溶剂中形成。紫外可见光谱表明,有机凝胶的溶胶-凝胶转变可以通过紫外/可见光辐照可逆地调节。重要的是,扫描电子显微镜(SEM)揭示了特征性的胶凝形态会因极性不同的溶剂而异。FT-IR,XRD和流变学测量表明,极性和非极性溶剂中不同的纳米结构可能是由于分子间氢键,π-π堆积驱动力以及形成凝胶的不同堆积模型的差异导致的。此外,作为一种高效的相选择胶凝剂,