Journal
JOURNAL OF COORDINATION CHEMISTRY
Volume 68, Issue 9, Pages 1644-1654Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00958972.2015.1024113
Keywords
Squaric acid; Copper; Crystal structure; Redox properties; Magnetism
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Funding
- National Science Foundation of China [21301194]
- Recruitment Program of Global Youth Experts
- Research Fund for the Doctoral Program of Higher Education of China [20130162120031]
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Three new copper(II)-squarate coordination polymers, 1-D double-chain {Cu(C4O4)(H2O)(2)(DMF)}(n) (1) (=dianion of 3,4-dihydroxy-3-cyclobuten-1,2-dione), 3-D network {[Cu(C4O4)(H2O)(2)]0.33H(2)O}(n) (2), and 3-D network {[Cu(C4O4)(H2O)(2)]0.33CH(3)OH}(n) (3), have been synthesized and characterized structurally. The complexes show altered assembly behavior in different solvent systems, which can further affect the physical properties of the frameworks. Cyclic voltammetry experiments show that 1, 2, and 3 have rich redox activities and both Cu(II) ions and squaric acid ligands are involved in redox process. Magnetic characterization on 3 shows the effect of weak antiferromagnetic exchange.
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