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Issue 30, 2014
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Ligand chain length conveys thermochromism

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Thermochromic properties of a series of non-ionic copper compounds have been reported. Herein, we demonstrate that Cu(II) ion with straight-chain primary amine (A) and alpha-linolenic (fatty acid, AL) co-jointly exhibit thermochromic properties. In the current case, we determined that thermochromism becomes ligand chain length-dependent and at least one of the ligands (A or AL) must be long chain. Thermochromism is attributed to a balanced competition between the fatty acids and amines for the copper(II) centre. The structure–property relationship of the non-ionic copper compounds Cu(AL)2(A)2 has been substantiated by various physical measurements along with detailed theoretical studies based on time-dependent density functional theory. It is presumed from our results that the compound would be a useful material for temperature-sensor applications.

Graphical abstract: Ligand chain length conveys thermochromism

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The article was received on 14 Mar 2014, accepted on 05 Jun 2014 and first published on 05 Jun 2014

Article type: Paper
DOI: 10.1039/C4DT00769G
Citation: Dalton Trans., 2014,43, 11624-11636
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    Ligand chain length conveys thermochromism

    M. Ganguly, S. Panigrahi, K. R. S. Chandrakumar, A. K. Sasmal, A. Pal and T. Pal, Dalton Trans., 2014, 43, 11624
    DOI: 10.1039/C4DT00769G

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