光谱法考察对称四甲基六元瓜环与二氯化-二(2-苯并咪唑)丁烷的分子识别  

Recognition of Symmetrical Tetramethyl-Substituted Cucurbit[6]uril and 2-(Butane-1,4-diyl) Dibenzimidazolium Dichloride with Spectroscopy

作　　者：易君明[1,2] 薛赛风[1] 陶朱[1] 

机构地区：[1]贵州大学贵州省大环化学及超分子化学重点实验室,贵州贵阳550025 [2]兴义民族师范学院,贵州兴义562400

出　　处：《光谱学与光谱分析》2013年第1期155-158,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(20972034);贵州省教育厅自然科学研究项目(黔省专合字[2009]103号)资助

摘　　要：以对称四甲基六元瓜环为主体,二氯化-二(2,2’-苯并咪唑)丁烷为客体,采用荧光光谱法和紫外吸收光谱法研究了主客体的相互作用。实验结果表明,主体对客体具有较强的包结识别能力,主客体之间可形成1∶1及2∶1的包结配合物,紫外吸收光谱法测得配合物的包结常数为K(1∶1)=4.79±0.01×104 L.mol-1,K(2∶1)=8.51±0.01×1010 L2.mol-2;荧光光谱法测得配合物的包结常数为K(1∶1)=7.02±0.01×104 L.mol-1,K(2∶1)=2.88±0.01×1010 L2.mol-2,两种方法结果一致。The molecular inclusions of symmetrical tetramethyl-substituted cucurbit[6]uril and 2-（butane-1,4-diyl）dibenzimidazolium dichloride were investigated by using electronic absorption spectroscopy and fluorescence spectroscopy.The experimental results reveal that the formation of host-guest inclusion complexes between TMeQ[6] and SBB were formed with stoichiometry ratios of 1∶1 and 2∶1,The calculated binding constants are K（1∶1）=（4.79±0.01）×104 L·mol-1 and,K（2∶1）=（8.51±0.01）×1010 L2·mol-2 respectively based on the absorption spectrophotometric analysis,while the calculated binding constants are K（1∶1）=7.02×104 L·mol-1 and K（2∶1）=2.88×1010 L2·mol-2 respectively based on the fluorescence spectroscopy analysis.The values of K are reasonably consistent.

关 键 词：对称四甲基六元瓜环 二氯化-二(2-苯并咪唑)丁烷 分子识别 紫外吸收光谱法 荧光光谱法 

分 类 号：O644.1[理学—物理化学]