Spin canting and metamagnetism in 3D pillared-layer homospin cobalt(ii) molecular magnetic materials constructed via a mixed ligands approach?

Inorganic Chemistry Frontiers Pub Date: 2014-02-07 DOI: 10.1039/C3QI00045A

Abstract

Two new 3D pillared-layer cobalt(II) molecular magnetic materials, formulated as {[Co2(TDA)(TZ)(H2O)2]·H2O}n (1) and {[Co3(TDA)2(bpy)3]·6.75H2O}n (2) (H3TDA = 1H-1,2,3-triazole-4,5-dicarboxylic acid, HTZ = 1H-1,2,4-triazole and bpy = 4,4′-bipyridine), have been successfully assembled with H3TDA and auxiliary ligands, respectively. In 1, the neighboring Co(II) ions are connected via TDA3? to generate 2D layers, which are further bridged by TZ? to build a 3D 8-connected bcu net with a Schl?fli symbol of (424·64), whereas in 2, the nearest Co(II) ions are connected via TDA3? to form a hexagonal [Co6(TDA)6]6? macrocycle composed of 24-membered atoms, which can be further linked to each other to generate 2D Kagomé layers. The Kagomé layers are connected by bpy pillars to display a 3D (3,4,4,4)-connected KAVGAQ net with a Schl?fli symbol of {63}2{64·102}{64·82}2. Magnetic studies reveal that both of them show the spin canting and metamagnetic behaviors with critical temperatures of 3.5 K and 4 K, respectively.

Graphical abstract: Spin canting and metamagnetism in 3D pillared-layer homospin cobalt(ii) molecular magnetic materials constructed via a mixed ligands approach
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