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Polymorphism in crystals of bis(4-bromophenyl)fumaronitrile through vapour phase growth

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Abstract

Polymorphic selectivity within crystals grown via physical vapour transport (PVT) is dependent on the thermodynamic stabilities of differing molecular conformations and the kinetic regime within the growth apparatus. Crystals of bis(4-bromophenyl)fumaronitrile have been grown for the first time via this method, with the formation of both the conventional polymorph and a new, unforseen polymorph. Analysis suggests that the conventional form is less thermodynamically stable, with this form crystallising at higher temperature than the newly discovered form due to the release of binding energy of intermolecular interactions during the growth process. Fluorometry reveals the new form to exhibit weaker, red-shifted fluorescence emission owing to greater intermolecular π–π overlap.

Graphical abstract: Polymorphism in crystals of bis(4-bromophenyl)fumaronitrile through vapour phase growth

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Publication details

The article was received on 24 Aug 2017, accepted on 10 Oct 2017 and first published on 17 Oct 2017


Article type: Paper
DOI: 10.1039/C7CE01543G
Citation: CrystEngComm, 2017, Advance Article
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    Polymorphism in crystals of bis(4-bromophenyl)fumaronitrile through vapour phase growth

    T. T. Jensen, J. Potticary, L. R. Terry, H. E. Bruce Macdonald, J. G. Brandenburg and S. R. Hall, CrystEngComm, 2017, Advance Article , DOI: 10.1039/C7CE01543G

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