Influence of cations on optical properties of iodobismuthates

Pandey, S and Chattopadhyay, T and Dev, S and Patil, Y and Carpenter-Warren, CL and Sinha, C (2020) Influence of cations on optical properties of iodobismuthates. In: Polyhedron, 179 .

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Abstract

Synthesis of iodobismuthates and tuning their properties attracted a lots of attention due to their contribution in developing opto-electronic devices. Two 1-D polymeric iodobismuthate compounds, 2,6-(NH2)2PyHBiI4n (1), 4-NMe2PyHBiI4n (2), Py: Pyridine have been reported, where structurally similar polymeric anionic iodobismuthate is stabilised by two different pyridinium cations namely 2,6-bis(amino)pyridine and 4-(N,N-dimethylamino)pyridine derivatives. The compounds have been characterised by single crystal XRD, IR and elemental analysis. It is interesting to observe that the structurally similar compounds differ drastically in their optical properties because of slight variation in the cations. Comparison in structural features and their thermal, optical properties (band gap: 1.91 eV (1); 2.10 eV (2)) have been discussed. Thermochromism is exhibited by 1. DFT studies of compound 1 has been performed considering the crystal structure measured at two different temperature and the role of cation in tuning the optical properties of iodobismuthates has been established.

Item Type:	Journal Article
Publication:	Polyhedron
Publisher:	Elsevier Ltd
Additional Information:	Copyright of this article belongs to Elsevier Ltd
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	17 Feb 2020 11:44
Last Modified:	17 Feb 2020 11:44
URI:	http://eprints.iisc.ac.in/id/eprint/64505

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