Synthesis and characterization of vanadium(III) and vanadium(IV) polymers containing 3,5-pyrazoledicarboxylato
- 20 October 2008
- journal article
- research article
- Published by Taylor & Francis in Journal of Coordination Chemistry
- Vol. 61 (22) , 3556-3567
Abstract
Three vanadium polymers [V2(µ-OH)2(H2O)2(Hpdc)2] n (1), {[Na2(µ-H2O)2][V2O2(pdc)2]} n (2) and {[K2(µ-H2O)][V2O2(pdc)2]} n (3) (H3pdc = 3,5-pyrazoledicarboxylate acid) have been hydrothermally synthesized and characterized by spectroscopic methods, magnetic susceptibility measurements and X-ray crystallography. The structure of 1 consists of infinite double-stranded chains. Both 2 and 3 are 3D coordination polymers, featuring ladder-like moieties, made up of [V2O2(pdc)2] subunits, interconnected by pairs of alkali ion chains. Variable-temperature magnetic behavior reveals the existence of antiferromagnetic interactions in 1 and dominant ferromagnetic interactions in 2 and 3.Keywords
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