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Type: Journal article
Title: A comparative study of the structural, optical, and electrochemical properties of squarate-based coordination frameworks
Author: Usov, Pavel M.
Keene, Tony Derek
Alessandro, Deanna
Citation: Australian Journal of Chemistry, 2013; 66(4):429-435
Publisher: CSIRO Publishing
Issue Date: 2013
ISSN: 0004-9425
School/Discipline: School of Chemistry and Physics
Statement of
Pavel M. Usov, Tony D. Keene, and Deanna M. D’Alessandro
Abstract: Systematic studies of the thermal expansion, optical, and redox properties of a series of six squarate-based frameworks, [MII(C4O4)(H2O)2] (MII = MnII, FeII, CoII, NiII, ZnII, CdII) have revealed that five members of the series exhibit cubic structures in which the squarate ligands are configured in an ‘eclipsed’ phase, while the CdII analogue exhibits a trigonal structure with a ‘staggered’ orientation of the ligands. The ‘eclipsed’ structures are characterised by a positive coefficient of thermal expansion, while the CdII analogue exhibits zero thermal expansion. Ultraviolet-visible-near infrared (UV-Vis-NIR) spectra and electrochemical measurements indicate that electron delocalisation across the dianionic squarate bridge is absent.
Rights: Journal compilation © CSIRO 2013
DOI: 10.1071/CH12474
Appears in Collections:Chemistry and Physics publications

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