Solution and solid state studies of a triangle-square equilibrium: Anion-induced selective crystallization in supramolecular self-assembly
Solution and solid state studies of a triangle-square equilibrium: Anion-induced selective crystallization in supramolecular self-assembly
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DOI：
10.1021/ic0112692
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发表时间：
2002-05-06
影响因子：
4.6
通讯作者：
Stang, PJ
中科院分区：
文献类型：
--
作者：
Schweiger, M;Seidel, SR;Stang, PJ
我们报道了当柔性的双配位给体单元trans-bis（4-pyridyl）ethylene与双配位受体单元cis-（Me 3 P）（2）Pt（OTf）（2）以1：1的比例反应时，三角形和正方形超分子物种的平衡混合物。这两种产品的特点是在溶液中，通过多核NMR，并在固态，通过X射线晶体学。水和阴离子的影响，钴碳硼烷与三氟甲磺酸盐，对平衡进行了探讨。两种物质中的任一种的选择性结晶可以通过适当选择溶剂和系统中存在的阴离子的比率来实现。溶液中的优势物种并不总是与固态中最普遍的物种一致。
We report that an equilibrium mixture of triangular and square supramolecular species results when the flexible, ditopic donor unit, trans-bis(4-pyridyl) ethylene, is reacted with the ditopic acceptor unit, cis-(Me3P)(2)Pt(OTf)(2), in a one-to-one ratio. Both products are characterized in solution, by way of multinuclear NMR, and in the solid state, via X-ray crystallography. The effects of water and anions, cobalticarborane versus triflate, on the equilibrium are probed. The selective crystallization of either of the two species can be accomplished via the appropriate choice of solvents and ratio of anions present in the system. The dominant species in solution is not always consistent with the most prevalent species in the solid state.