Reversible Guest-Induced Magnetic and Structural Single-Crystal-to-Single-Crystal Transformation in Microporous Coordination Network {[Ni(cyclam)]₃[W(CN)₈]₂}_n

Abstract

Planar honeycomb-like coordination network {[Ni(cyclam)]3[W(CN)8]2}n (cyclam = 1,4,8,11-tetraazacyclotetradecane) was obtained in the self-assembly reaction of [Ni(cyclam)]2+ and [W(CN)]83-. Its structure is characterized by void channels along the a axis. The compound shows reversible water adsorption in the temperature range of 25-40 degrees C with the formation of {[Ni(cyclam)]3[W(CN)8]2}n.16nH2O, accompanied by single-crystal-to-single-crystal transformation. The structural transformation significantly changes the character of intraplane magnetic exchange interactions.

Hydration-switchable charge transfer in the first bimetallic assembly based on the [Ni(cyclam)]3+ – magnetic CN-bridged chain {(H3O)[NiIII(cyclam)][FeII(CN)6]·5H2O}n

“…15 The discovery of its oxidized form as a building block opens up the possibility of rational design of materials in which charge-transfer and sorption properties are merged. The Ni-Fe chain that we present in this work is the first member of an emerging family of Ni II/III -based CT-active assemblies -potential candidates for vapour-sensitive switches and multi-switchable materials.…”

Two bimetallic W(IV)-Mn(II) complexes based on octacyanometallates: structures and magnetic properties

“…Octacyanometallates are a versatile class of building blocks that can adopt three different spatial configurations: square antiprism (D 4d ), dodecahedron (D 2d ), or bicapped trigonal prism (C 2v ), depending on the external environment. A variety of structures containing [M(CN) 8 ] 3−/4− have been successfully prepared, ranging from zero-dimensional (0-D) clusters to three-dimensional (3-D) networks [9][10][11][12][13][14][15][16][17] . There are a few examples based on [W(CN) 8 …”

Neutral Low-Dimensional Assemblies of a Mn(III) Schiff Base Complex and Octacyanotungstate(V): Synthesis, Characterization, and Magnetic Properties

“…Some of them are 1D polymers [53][54][55][56]; others possess layered [57][58][59][60][61][62][63] or 3D network structures [64][65][66][67][68]. The paramagnetic cyanotungstate(V) tectones have been used to build discrete molecules [69][70][71], chains [53][54][55][56], 2D [57] and 3D networks [64][65][66][67][68], and some of them have displayed variable magnetic properties such as high ordering temperatures [72], photo-induced magnetism [73,74], SMMs [75], and SCMs [17,54,55].…”