Expanding multiple anion superlattice chemistry: Synthesis, structure and properties of Bi₄O₄SeBr₂ and Bi₆O₆Se₂Cl₂

Gibson, QD, Newnham, JA, Dyer, MS ORCID: 0000-0002-4923-3003, Robertson, CM ORCID: 0000-0002-4789-7607, Zanella, M ORCID: 0000-0002-6164-6169, Surta, TW ORCID: 0000-0002-2882-6483, Daniels, LM ORCID: 0000-0002-7077-6125, Alaria, J ORCID: 0000-0001-5868-0318, Claridge, JB ORCID: 0000-0003-4849-6714 and Rosseinsky, MJ ORCID: 0000-0002-1910-2483 (2022) Expanding multiple anion superlattice chemistry: Synthesis, structure and properties of Bi₄O₄SeBr₂ and Bi₆O₆Se₂Cl₂ JOURNAL OF SOLID STATE CHEMISTRY, 312. 123246-. ISSN 0022-4596, 1095-726X

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Abstract

The synthesis, structure, and properties of the three-anion superlattice materials Bi<inf>4</inf>O<inf>4</inf>SeBr<inf>2</inf> and Bi<inf>6</inf>O<inf>6</inf>Se<inf>2</inf>Cl<inf>2</inf> are reported. These materials crystallise in structures that form part of a homologous series of compounds comprised of stackings of BiOCl- and Bi<inf>2</inf>O<inf>2</inf>Se-like units. Bi<inf>4</inf>O<inf>4</inf>SeBr<inf>2</inf> is analogous to Bi<inf>4</inf>O<inf>4</inf>Se<inf>2</inf>Cl<inf>2</inf>, whereas Bi<inf>6</inf>O<inf>6</inf>Se<inf>2</inf>Cl<inf>2</inf> contains an additional Bi<inf>2</inf>O<inf>2</inf>Se layer that produces off-centred anions. The band gaps of both materials are indirect, with E<inf>g</inf> ​= ​1.15(5) eV, and the materials behave as doped semiconductors with very low thermal conductivities. These materials expand the synthetic scope of multiple anion superlattice materials and, with optimisation, may also be platforms for future thermoelectric materials.

Item Type:	Article
Uncontrolled Keywords:	3402 Inorganic Chemistry, 3403 Macromolecular and Materials Chemistry, 34 Chemical Sciences
Divisions:	Faculty of Science & Engineering > School of Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	04 Jul 2022 13:02
Last Modified:	16 Jun 2026 11:36
DOI:	10.1016/j.jssc.2022.123246
Open Access URL:	https://doi.org/10.1016/j.jssc.2022.123246
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3157741
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