Self-Assembled M<sub>6</sub>L<sub>4</sub>-Type Coordination Nanocage with 2,2‘-Bipyridine Ancillary Ligands. Facile Crystallization and X-ray Analysis of Shape-Selective Enclathration of Neutral Guests in the Cage
作者:Takahiro Kusukawa、Makoto Fujita
DOI:10.1021/ja020712k
日期:2002.11.1
possible the detailed analysis of the enclathration geometry of guests by X-ray crystallographic study. It is found that guests are enclathrated in three different manners, depending upon the shape and the size of the guests: tetrahedral 1:4 complexation, orthogonal 1:2 complexation, and a simple 1:1 complexation. The solution structures elucidated by NMR are in good accordance with the solid structure,
空心和大致球形笼 1(直径约 2 nm)由 2,4,6-三(4-吡啶基)-1,3,5-三嗪 (2) 和 Pd(二胺)(ONO( 2))(2) (3)。这种笼状化合物包合了水相中的各种中性有机分子。与在金属中心具有辅助乙二胺配体的笼 1a 不同,受 2,2'-联吡啶 (bipy) 保护的笼 1b 很容易结晶,从而可以通过 X 射线晶体学研究详细分析客体的包合几何形状。发现根据客体的形状和大小,客体以三种不同的方式被包围:四面体 1:4 络合、正交 1:2 络合和简单的 1:1 络合。NMR阐明的溶液结构与固体结构非常吻合,