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A comparative study of the structural, optical, and electrochemical properties of squarate-based coordination frameworks

A comparative study of the structural, optical, and electrochemical properties of squarate-based coordination frameworks
A comparative study of the structural, optical, and electrochemical properties of squarate-based coordination frameworks
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.
0004-9425
429-435
Usov, Pavel M.
4916d1d5-1982-462e-96f1-219434c21d70
Keene, Tony D.
fb859c26-6a1d-4c43-a15f-f329bc8d34d7
D'Alessandro, Deanna M.
de8b3d62-0504-4bee-836a-084fbb92fcf7
Usov, Pavel M.
4916d1d5-1982-462e-96f1-219434c21d70
Keene, Tony D.
fb859c26-6a1d-4c43-a15f-f329bc8d34d7
D'Alessandro, Deanna M.
de8b3d62-0504-4bee-836a-084fbb92fcf7

Usov, Pavel M., Keene, Tony D. and D'Alessandro, Deanna M. (2013) A comparative study of the structural, optical, and electrochemical properties of squarate-based coordination frameworks. Australian Journal of Chemistry, 66 (4), 429-435. (doi:10.1071/CH12474).

Record type: Article

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.

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More information

Published date: 2013
Organisations: Organic Chemistry: Synthesis, Catalysis and Flow, Chemistry, Faculty of Natural and Environmental Sciences

Identifiers

Local EPrints ID: 363470
URI: http://eprints.soton.ac.uk/id/eprint/363470
ISSN: 0004-9425
PURE UUID: dd10f3e6-5b72-441b-8848-2e30a70c486a
ORCID for Tony D. Keene: ORCID iD orcid.org/0000-0003-2297-4327

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Date deposited: 25 Mar 2014 13:20
Last modified: 20 Jul 2019 00:39

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Contributors

Author: Pavel M. Usov
Author: Tony D. Keene ORCID iD
Author: Deanna M. D'Alessandro

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