Self-assembly Of Metal Complexes Research Articles

Supramolecular Control of Spin Crossover Phenomena Using Various Amphiphiles

An aspect of nanochemistry that has attracted significant attention is the formation of nanoarchitectures from the self-assembly of metal complexes, based on the design of compounds having cooperative functionalities. This technique is currently seen as important within the field of nanomaterials. In the present review, we describe the methods that allow tuning of the intermolecular interactions between spin crossover (SCO) complexes in various media. These approaches include the use of lipophilic derivatives, lipids, and diblock copolypeptide amphiphiles. The resulting supramolecular assemblies can enhance the solubility of various SCO complexes in both organic and aqueous media. In addition, amphiphilic modifications of coordination systems can result in metastable structures and dynamic structural transformations leading to unique solution properties, including spin state switching. The supramolecular chemistry of metal complexes is unprecedented in its scope and potential applications, and it is hoped that the studies presented herein will promote further investigation of dynamic supramolecular devices.

Self-assembly and functionalization of lipophilic metal-triazole complexes in various media

An aspect of nanochemistry, which has attracted significant attention, is the formation of one-dimensional (1D) nanofibers from the self-assembly of metal complexes. The fabrication of nanoarchitectures from such complexes, based on the design of compounds, which show cooperative functionalities, is currently seen as one of the important goals within the field of nanomaterials. In this review, we describe methods that allow the tuning of the intermolecular interactions between metal-triazole complexes, whether in solution, thin films or liquid crystals. The lipophilic triazole ligand 1 (C12OC3Trz) has been designed such that an ether linkage exists in the alkyl chain moiety. This flexible ether linkage enhances the solubility of various complexes of this ligand (including [CoII(1)3]Cl2 and [FeII(1)3]Cl2) in organic media and also improves the packing efficiency of the alkyl chains. Such lipophilic modifications of 1D coordination systems can result in dynamic structural transformations leading to unique solution properties, including heat-set gel-like networks, guest-induced structural changes, electrochemical transformations and spin crossover state switching. The supramolecular chemistry of 1D metal complexes is unprecedented in its scope and potential applications, and it is hoped that the studies presented herein will provide new information to promote further investigation of dynamic supramolecular devices. The lipophilic triazole ligand 1 (C12OC3Trz) has been designed such that an ether linkage exists in the alkyl chain moiety. This flexible ether linkage enhances the solubility of various complexes of this ligand (including [CoII(1)3]Cl2 and [FeII(1)3]Cl2) in organic media and also improves the packing efficiency of the alkyl chains. Such lipophilic modifications of 1D coordination systems can result in dynamic structural transformations leading to unique solution properties, including heat-set gel-like networks, guest-induced structural changes, electrochemical transformations and spin crossover state switching.

Self-assembly of metal complexes with cyclophane or plymeric chain structures about a 1,3,5-tris(diphenylphosphino)benzene core

Two very different molecular shapes are formed using the ligand 1,3,5-tris(diphenylphosphino)benzene (L); polymeric chains form through Au⋯Au contacts in the crystals of [(ClAu)3L], while the metallocyclophane [(PtCl2)3L2] self assembles from five components when L and [PtCl2(cod)] are combined in a 2:3 molecular ratio.