摘要
研究了β-环糊精(β-CD)及其衍生物甲基-β-环糊精(M-β-CD)、羟丙基-β-环糊精(HP-β-CD)对水杨酸甲酯(MS)双重荧光光谱的影响,并将其与MS在不同溶剂中的荧光光谱进行对比。结果表明,MS的双重荧光与所处微环境的氢键性质密切相关,β-CD取代基的大小会导致空腔口处的极性和空间位阻不同,相应改变了分子间氢键相互作用,当MS分子进入β-CDs空腔时会引起其基态互变异构体之间平衡的移动,从而导致光谱的变化。包合物稳定常数测定表明,三种β-CDs对MS包合能力的大小为M-β-CD>HP-β-CD>β-CD。
The influence of β-CD, M-β-CD and HP-β-CD on dual fluorescence of methyl salicylate （MS） was invertigated and compared with that of MS in organic solvents. The dual fluorescence of MS closely correlate with its hydrogen bonding property of microenvironment. The size of substituents at the rim of β-CD results in different polarity and steric hindrance at the cavity opening. The intermolecular hydrogen bonding interaction of MS changes in the presence of different β-CDs accordingly. When MS is bound to β-CDs,its ground state equilibrium shifts, which leads to different dual fluorescence. The formation constants indicate that the binding stren of β-CD and its derivatives to MS is in the order：M-β-CD〉HP-β-CD-β-CD.
出处
《光谱实验室》
CAS
CSCD
2008年第2期43-47,共5页
Chinese Journal of Spectroscopy Laboratory
基金
国家自然科学基金重点项目(20335030)
西北师范大学二期科技创新基金(NWNU-KJCXGC-02-09)
关键词
双重荧光
分子内氢键
分子间氢键
水杨酸甲酯
Β-环糊精
Dual Fluorescence, Intramolecular Hydrogen Bonding. Intermolecular Hydrogen Bonding, Methyl Salicylate,β-Cyclodextrins.
