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Issue 26, 2014
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Turning colour on and off using molecular disorder and proton transfer in multi-component molecular complexes

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Abstract

Six molecular complexes resulting from co-crystallisation experiments of 4-iodoaniline or the related 4-iodo-2-methylaniline with dinitrobenzoic acids are reported. The individual components are not coloured or very pale in colour, but when molecular complexes are formed combining the two, vividly red crystals are obtained when layered crystal structures prevail. Where proton transfer results in completely ionic co-components, colourless crystals are formed. Molecular disorder is also found to favour layered, coloured crystals. In the pair of thermochromic molecular complexes comprised of 4-iodo-2-methylaniline with 3,5-dinitrobenzoic acid, proton transfer from one molecule to the other is shown to result in a colour change from red to colourless.

Graphical abstract: Turning colour on and off using molecular disorder and proton transfer in multi-component molecular complexes

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Article information


Submitted
29 Jan 2014
Accepted
06 Mar 2014
First published
06 Mar 2014

CrystEngComm, 2014,16, 5849-5858
Article type
Paper
Author version available

Turning colour on and off using molecular disorder and proton transfer in multi-component molecular complexes

C. L. Jones, C. C. Wilson and L. H. Thomas, CrystEngComm, 2014, 16, 5849
DOI: 10.1039/C4CE00229F

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