Study of the counter anions in the host-guest chemistry of cucurbit[8]uril and 1-ethyl-1'-benzyl-4,4'-bipyridinium.
Study of the counter anions in the host-guest chemistry of cucurbit[8]uril and 1-ethyl-1'-benzyl-4,4'-bipyridinium.
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DOI：
10.1155/2013/452056
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发表时间：
2013
影响因子：
--
通讯作者：
Sun S
中科院分区：
文献类型：
--
作者：
Ji H;Liu F;Sun S
合成了一系列具有不同抗衡阴离子（BEV-X2，其中X为Cl、Br、I、PF 6、ClO 4）的1-乙基-1 '-苄基-4，4'-联吡啶化合物。利用NMR、MS、电化学、Na 2S 2 O 4诱导的氧化还原化学和UV-Vis等方法，首次研究了不同抗衡阴离子在葫芦[8]脲（CB[8]）主客体化学中的作用。结果表明，BEV-X2在水中可以与CB[8]形成1：1的主客体复合物。理论计算进一步表明，紫精区域穿过CB的空腔[8]，而相应的抗衡阴离子位于空腔之外。紫外-可见滴定和Na_2S_2O_4诱导的氧化还原反应存在一定的差异，表明抗衡阴离子对主客体化学反应有一定的影响。所有这些都为CB[8]宾主系统提供了新的见解。
A series of 1-ethyl-1′-benzyl-4,4′-bipyridinium compounds with different counter anions (BEV-X2, where the X is Cl, Br, I, PF6, ClO4) were synthesized. By using of NMR, MS, electrochemistry, Na2S2O4-induced redox chemistry, and UV-Vis, the role of the different counter anions in the host-guest chemistry of cucurbit[8]uril (CB[8]) was studied for the first time. The result demonstrated that BEV-X2 can form a 1 : 1 host-guest complex with CB[8] in water. Theoretical calculation further suggested that the viologen region was threaded through the cavity of CB[8], while the corresponding counter anions were located outside the cavity. Some difference can be observed on UV-Vis titration and Na2S2O4-induced redox chemistry, which showed that the counter anions have some effect on the host-guest chemistry. All these provide new insights into CB[8] host-guest system.
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DOI：
10.1007/s10847-008-9464-y
发表时间：
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影响因子：
2.3
作者：
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