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Reversibly thermochromic bismuth-organic materials with tunable optical gaps

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Abstract

Five reversibly thermochromic bismuth-based inorganic–organic hybrid materials were synthesized via facile one-step condensation reactions between triphenylbismuth and four arenedithiols and a diselenol. The materials were characterized by UV-vis and FT-IR spectroscopy, powder X-ray diffraction (PXRD), energy dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), elemental analysis (EA), and thermogravimetric analysis (TGA). The bismuth-organic materials (Bi-OMs) are colored materials with optical HOMO–LUMO gaps that were readily tuned by systematic modification of the steric and electronic character of the π-conjugated organic linkers. All five Bi-OMs exhibit completely reversible thermochromism in the solid-state, and possess excellent thermal stability in air up to nearly 300 °C. This combination of physical properties, coupled with the ease of synthesis and the inexpensive, non-toxic nature of bismuth, make this class of inorganic–organic hybrid materials potentially promising for reversible smart window applications, camouflage coatings, temperature sensing, photocatalysis, color filters and displays.

Graphical abstract: Reversibly thermochromic bismuth-organic materials with tunable optical gaps

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Publication details

The article was received on 21 Jul 2017, accepted on 13 Sep 2017 and first published on 14 Sep 2017


Article type: Paper
DOI: 10.1039/C7TC03277C
Citation: J. Mater. Chem. C, 2017, Advance Article
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    Reversibly thermochromic bismuth-organic materials with tunable optical gaps

    G. Zhang and J. M. W. Chan, J. Mater. Chem. C, 2017, Advance Article , DOI: 10.1039/C7TC03277C

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