Novel Spiropyran Amphiphiles and Their Application as Light-Responsive Liquid Crystalline Components
作者:Kristian J. Tangso、Wye-Khay Fong、Tamim Darwish、Nigel Kirby、Ben J. Boyd、Tracey L. Hanley
DOI:10.1021/jp403840m
日期:2013.9.5
tails. Changing the R group did not influence the equilibrium rate constants for the isomerization of SP. Phase transition temperatures of liquid crystalline (LC) matrices were influenced significantly by incorporation of the SP derivatives and were greatest when the photochromic compound possessed an intermediate tail length substituent compared to the short alkyl or bulkier moieties. The level of disruption
由水中的液晶脂质形成的光响应材料可能通过包含光致变色添加剂(如螺吡喃)而应用于药物递送。合成了一系列螺吡喃(SP)的新型类似物,它们具有一个具有C 8(SP-OC),C 12(SP-L)和C 16(SP-P)尾巴的SP头基,以探索β-吡喃吡喃的影响。疏水尾部的长度对其理化性质的影响以及对液晶矩阵中行为的影响,以期在紫外线照射中用作刺激响应元件。此外,具有油基(SP-OL)和植烷基(SP-PHYT)尾部的化合物可模仿“母体”反向双连续立方(V 2还制备了相形成脂质,甘油单油酸酯(GMO)和植物三醇。使用热台显微镜(HSM),差示扫描量热法(DSC)和紫外可见光谱等技术,通过在溶液中的熔点和光物理行为来表征光致变色化合物。它们对块状V 2平衡纳米结构的影响使用小角度X射线散射(SAXS)评估了暴露于紫外线后的相和相转换动力学。SP衍生物的熔点随着链长的增加而线性降低,这表明头基之间的相互作用决