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Non-transient thermo-/photochromism of iodobismuthate hybrids directed by solvated metal cations

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Abstract

Two iodobismuthate-based organic–inorganic hybrids, [M(DMSO)8][Bi2I9] (M = La (1), Bi (2)), have been successfully designed and synthesized by using solvated metal cations as structure-directing agents (SDAs). 1 displays transient high-temperature thermochromism, which is similar to that of the characteristic low-temperature thermochromic properties of bulk bismuth iodide and iodobismuthate hybrids. In contrast, 2 exhibits distinguishing non-transient thermochromic properties stimulated by the different temperature ranges of the thermal treatments. More importantly, a comparison of the optical inertness of 1 and 2 also reveals novel photochromic behavior. The completely different thermo-/photo-responsive properties of 1 and 2 are mainly ascribed to the different binding abilities of the central metal cations with DMSO molecules, which cause a distinct transformation of the inorganic moiety and consequent modulation of band gaps.

Graphical abstract: Non-transient thermo-/photochromism of iodobismuthate hybrids directed by solvated metal cations

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Article information


Submitted
19 Dec 2019
Accepted
08 Jan 2020
First published
08 Jan 2020

Dalton Trans., 2020, Advance Article
Article type
Paper

Non-transient thermo-/photochromism of iodobismuthate hybrids directed by solvated metal cations

P. Hao, W. Wang, J. Shen and Y. Fu, Dalton Trans., 2020, Advance Article , DOI: 10.1039/C9DT04818A

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