Partial molar volume study of the complexes of calix[4]naphthalenes with [60]fullerene in different solvents
Partial molar volume study of the complexes of calix[4]naphthalenes with [60]fullerene in different solvents
复制标题
不同溶剂中杯[4]萘与[60]富勒烯配合物的部分摩尔体积研究
DOI：
10.1039/b006580n
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
P. Georghiou
中科院分区：
文献类型：
--
作者：
S. Mizyed;P. Tremaine;P. Georghiou
杯形[4]萘是一类比类似杯形[4]芳烃具有更深空腔的空腔体或容器分子。早期对[60]富勒烯（C60）与c4对称杯内[4]萘(1)及其叔丁基取代衍生物(2)的络合研究表明，[60]富勒烯（C60）与C60在苯、甲苯或CS2溶液中形成超分子1∶1配合物，并具有较高的缔合平衡常数（Kassoc）。本文报道了由密度计导出的C60与杯体[4]萘1和萘2在这些溶剂中络合反应的标准偏摩尔体积变化。在C60∧2配合物的情况下，结果与先前假设的疏溶剂效应一致。然而，C60∧1配合物的结果表明，除了疏溶剂效应之外，可能还有其他因素在起作用。
Calix[4]naphthalenes are a class of cavitands or container molecules that possess deeper cavities than those of analogous calix[4]arenes. Earlier studies of the complexation of [60]fullerene (C60) with the C4-symmetrical endo-calix[4]naphthalene (1) and its tert-butyl-substituted derivative (2) show that they form supramolecular 1∶1 complexes with C60 in benzene, toluene or CS2 solution with relatively high association equilibrium constants (Kassoc). Reported herein are densitometer-derived standard partial molar volume changes for the complexation, in these respective solvents, of C60 and the calix[4]naphthalenes 1 and 2. In the case of the C60⊂2 complexes, the results are consistent with a solvophobic effect postulated previously. The results obtained for the C60⊂1 complexes however suggest that in addition to a solvophobic effect, other factors may be operating.