化学
钯
部分
咪唑
配体(生物化学)
笼子
氢键
吡啶
纳米笼
超分子化学
自组装
接受者
分子
结晶学
立体化学
组合化学
晶体结构
催化作用
有机化学
受体
物理
凝聚态物理
组合数学
生物化学
数学
作者
Dipak Samanta,Partha Sarathi Mukherjee
标识
DOI:10.1002/chem.201402553
摘要
Abstract Dynamic supramolecular systems involving a tetratopic palladium(II) acceptor and three different pyridine‐ and imidazole‐based donors have been used for self‐selection by a synergistic effect of morphological information and coordination ability of ligands through specific coordination interactions. Three different cages were first synthesized by two‐component self‐assembly of individual donor and acceptor. When all four components were allowed to interact in a reaction mixture, only one out of three cages was isolated. The preferential binding affinity towards a particular partner was also established by transforming a non‐preferred cage into a preferred cage by interaction with the appropriate ligand. Computational studies further supported the fact that coordination interaction of imidazole moiety to Pd II is enthalpically more preferred compared to pyridine, which drives the selection process. Analysis of crystal packing of both complexes indicated the presence of strong hydrogen bonds between nitrate and water molecules and also H‐bonded 3D networks of water. Both complexes exhibit promising proton conductivity (10 −5 to ca. 10 −3 S cm −1 ) at ambient temperature under a relative humidity of circa 98 % with low activation energy.
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