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中文摘要：
利用荧光发射光谱、紫外吸收光谱和核磁共振氢谱（^1H NMR）研究了八元瓜环（CB8）与2-（2-氨基-3-吡啶基）苯并咪唑（2-A3PyBI）的超分子相互作用及其对2-A3PyBI分子内质子转移过程的影响．结果表明，在水溶液中2-A3PyBI具有双重荧光发射峰，分别对应其2种质子转移异构体．固定pH值下的荧光滴定实验表明主客体包合比为1：2，2-A3PyBI进入CB8空腔后促进了其分子内激发态质子转移过程．同时，^1H NMR结果表明2-A3PyBI的苯环部分进入了CB8空腔．
英文摘要：
The inclusion interaction of 2-（2-amino-3-pyridyl） -benzimidazole （2-A3PyBI） with cucurbit [ 8 ] uril（CB8） and the effect of the interaction on the proton transfer of 2-A3PyBI were studied via fluorescence emission spectroscopy, UV absorption spectroscopy and 1H NMR. The results show that 2-A3PyBI has a dual emission fluorescence which corresponds to its proton transfer tautomers. The fluorescence titration results at selected pH value indicate that the interaction ratio is 1：2 and the encapsulation of 2-A3PyBI into CB8 cavity enhances the excited-state intramolecular proton transfer process. The 1H NMR titration results, which the benzene ring signal upward but no obviously change of the pyridine ring was observed in DCI/D20, indicate that the benzene ring of 2-A3PyBI entrapped into the CB8 cavity with the ovridine rin outside the cavity.
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