Chiral Metallocycles Templated Novel Chiral Water Frameworks

An intentionally synthesized chiral terpyridyl ligand S-2­(4-(2,6-di­(pyridin-2-yl)­pyridin-4-yl)-benzylamino)­propanoic
acid
(H2L) was used to construct two chiral NiII complexes,
[Ni2­(HL)2­(N3)­(H2O)]­(N3)·19H2O (1) and [Ni2­(HL)2­(N3)2]·7H2O (2). Both complexes are
dinuclear metallocyclic complexes. The monoanionic form (HL)− of the chiral ligand coordinates to the metal centers in a bichelating
antiparallel fashion to form the metallomacrocycles where the chiral
metallocycles Ni2(HL)2 template the formation
of a novel chiral 3D zeolite-like water framework with nanometer cages
trapping the metallocycles or anchor chiral water chains in the 1D
channels of a resulting chiral 3D supermolecule, respectively.

本研究采用特意合成的手性二吡啶基配体S-2-(4-(2,6-二(吡啶-2-基)吡啶-4-基)苯甲基氨基)丙酸（H2L）构建了两种手性NiII配合物，分别为[Ni2(HL)2(N3)(H2O)](N3)·19H2O（1）和[Ni2(HL)2(N3)2]·7H2O（2）。这两种配合物均为双核金属环状配合物。手性配体的单负离子形式（HL）-与金属中心以双螺旋反平行方式配位，形成金属大环结构，其中手性金属环Ni2(HL)2模板化构建了一种新型的手性三维沸石类水框架，纳米笼捕获金属环或锚定手性水链，分别嵌入所得手性三维超分子的一维通道中。