荧光光谱研究含1,5取代萘刚性生色基双分子膜的相变  

Fluorescence Study on Phase Transition of Single Chain Amphiphile with 1,5 Substituted Naphthalene Group in Bilayer Membranes

作　　者：李国文[1,2] 李长春[1,2] 吴立新[1,2] 

机构地区：[1]吉林大学超分子结构与谱学开放实验室 [2]吉林工学院轻纺系

出　　处：《光散射学报》1999年第3期210-214,共5页The Journal of Light Scattering

基　　金：吉林省科委基金

摘　　要：用荧光光谱研究了系列双亲物ＣｎＮａｐｈ（１，５）Ｃ６Ｎ＋（ｎ＝１６，１２，１０，８，６和４）聚集体的热致相变，发现荧光强度随温度升高发生了急剧变化，归因于聚集体从凝胶态到液晶态的相变。实验结果表明，尾链长短直接影响聚集体结构和相变温度Ｔｃ高低：尾链长，聚集体堆积密度大，荧光强度强，Ｔｃ高；反之亦反。荧光光谱的实验结果与透射电镜和ＤＳＣ研究结果一致。Fluorescence spectra in dilute aqueous solution of single chain amphiphiles with 1,5 substituted naphthalene moiety were measured at different temperature. The spectra showed an abrupt change in the fluorescence intensity around Tc with increasing temperature.The abrupt change was atributed to phase transition of gel to liquid crystal state. The fluorescence change of these aggregates depends on hydrophobic interaction between amphiphile molecules. Fluorescence results reported here are in good agreement with DSC studies.

关 键 词：荧光光谱 双分子膜 相变 聚集体 生物膜 

分 类 号：Q73[生物学—分子生物学]