Evidence for Highly Selective Supramolecular Formation between Perylene/γ-CD and Pyrene/γ-CD Complexes in Water
Evidence for Highly Selective Supramolecular Formation between Perylene/γ-CD and Pyrene/γ-CD Complexes in Water
复制标题
苝/γ-CD 和芘/γ-CD 配合物在水中高度选择性形成超分子的证据
DOI：
10.1021/jp0366567
复制
发表时间：
2004
影响因子：
3.3
通讯作者：
A. Malliaris
中科院分区：
文献类型：
--
作者：
G. Pistolis;A. Malliaris
用电子激发能转移的方法研究了芘和苝与γ-环糊精在水中的同时络合反应。我们发现，虽然在溶液中存在三种不同的芘/γ-环糊精配合物，其化学计量量分别为1:1,1:2和2:2，但所形成的（苝）1/（γ-环糊精）2配合物只与准分子发射的（芘）2/（γ-环糊精）2加合物结合，而与其他配合物完全不结合。此外，当芘被它的一些同系物取代时，这种效应没有观察到，这些同系物也与γ-环糊精形成2:2的准分子发射配合物。
We have studied the simultaneous complexation of pyrene and perylene with γ-cyclodextrin in water by means of electronic excitation energy transfer. We found evidence that although in the solution there are present three different pyrene/γ-cyclodextrin complexes with stoichiometries of 1:1, 1:2, and 2:2 the (perylene)1/(γ-cyclodextrin)2 complex that is formed associates exclusively with the excimer-emitting (pyrene)2/(γ-cyclodextrin)2 adduct and not at all with the others. Moreover, this effect is not observed when pyrene is replaced by some of its homologues, which also form 2:2 excimer-emitting complexes with γ-cyclodextrin.