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钡离子驱动荧光准轮烷 被引量:2

Barium-driven [2]pseudorotaxane with fluorescence addresses
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摘要 含有水溶性季铵盐基团的4-正己氨基-1,8-萘酰亚胺化合物在水中与葫芦脲[6]通过疏水及氢键作用形成准轮烷结构,而且体系荧光波长红移了17nm,荧光强度降低32%.研究表明,往准轮烷溶液中加入与葫芦脲[6]具有强结合力的Ba2+离子会使准轮烷结构离解,体系荧光恢复;而再往溶液中加入SO42-,Ba2+以BaSO4沉淀的形式被除去,这时准轮烷又重新生成.核磁氢谱、紫外-可见吸收光谱、荧光光谱和荧光寿命对体系的结合/离解过程的研究表明这种结合/离解过程是可逆的.本体系可以模拟插头/插座的连接和断开动作. A water-soluble 4-(n-hexylamino)-1,8-naphthalimide derivative was synthesized and can form a [2]pseudorotaxane with cucurbit[6]uril (CB[6]) by hydrophobic and hydrogen-bonding interactions in aqueous solution. The unthreading and rethreading of the CB[6] ring can simulate a molecular-level plug/socket system, which can be reversibly driven by Ba^2+/SO4^2- and accompanied by obvious fluorescent changes both in wavelength and intensity.
出处 《中国科学:化学》 CAS CSCD 北大核心 2010年第4期364-371,共8页 SCIENTIA SINICA Chimica
基金 国家重点基础研究发展计划(批准号:2006CB806200) 国家自然科学基金(批准号:20603009) 高等学校全国优秀博士学位论文作者专项(批准号:200758)资助
关键词 准轮烷 分子器件 分子机器 葫芦脲 pseudorotaxane molecular devices molecular machines cucurbituril
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