胆甾液晶二氮杂冠醚-Eu(Ⅲ)配合物LB膜和荧光性质研究

Studies on LB Film and Fluorescence Properties of Cholesteric Liquid Crystalline Diaza Crown Ether and Its Complex with Eu(Ⅲ)

研究了胆甾液晶二氮杂冠醚Ｎ，Ｎ－双［胆甾－５－烯－３β－氧羰甲基］－１，１０－二氮－４，７，１３，１６－四氧环十八烷（１）及其与Ｅｕ３＋的配合物（２）、２与苯甲酸的混配物（３）的ＬＢ膜和荧光性质．结果表明：１、２和３都在水溶液亚相液面形成稳定的单分子膜，但只有１的单分子面积受亚相ｐＨ的影响．１、２和３的单分子膜都容易转移到石英基片上形成ＬＢ膜，其中２和３为Ｘ型，转移比分别为０．６和１．０．在ＬＢ膜中，在２的荧光激发波长范围比在溶液中的宽，荧光强度也比在溶液中的强得多．在２中添加苯甲酸形成３可改善ＬＢ膜中分子有序排列，荧光强度增强到无苯甲酸时的２．０倍．所有这些ＬＢ膜，即使添加了苯甲酸的，都不是很稳定．

LB film and flourescence properties of the crown ether(1)( N,N bi(cholest 5 en 3 β oxocarbonylmethyl) 1,10 diaza 4,7,13,16 tetra oxocycloctadecane), its complex with Eu 3+ (2) and the mixture of 2 and benzoic acid(3) have been studied respectively. All of 1, 2 and 3 can from perfect monolayer on the subphase of water and only the monomolecular area of 1 is changeable with subphase pH. The monolayers of 1, 2 and 3 can be transfered to quartz glass substrate fo form LB film respectively. Among the three LB films, 2 and 3 are X type and their transfering ratio are 0 6 and 1 0 respectively. Fluorescence exciting wavelength of 2 in solution is wider than that of Eu 3+ . The fluorescence intensity of 2 of LB film is much greater than that in solution. Addition of benzoic acid to 2 also increases the fluorescence intensity of the LB film, because benzoic acid makes the LB film structure better. These LB films, even containing benzoic acid, are not very stable.