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Boroarsenates: a framework motif and family templated on cations and anions

Boroarsenates: a framework motif and family templated on cations and anions
Boroarsenates: a framework motif and family templated on cations and anions
Molten salt reactions of NH4H2AsO4, H3BO3, and MX (M = Li, Na, K, Rb Cs, NH4 and X = F, Cl, Br) yield numerous new alkali metal and alkali metal salt templated three-dimensional boroarsenate and fluoroboroarsenate frameworks. The structures of these materials are formed from BO4 (BO3F) and As(O,OH)4 tetrahedra defining channels and interlayer regions containing either simple alkali metal cations or both cations and halide anions. These boroarsenate-based frameworks are unusual in comparison with other oxotetrahedral-based materials in that terminal OH, on As, may be present, decorating the inner surfaces of the channels, as in the 12-membered rings of K2[B(AsO3O)2H]. This unit also permits coordination to nonframework anions as well as cations, so that (Cs2[BAsO3OH]8[AsO4]2[CsCl4]Cl)2 (and its Br analogue) contains layers of [CsCl4]3- and Cl- ions separated and coordinated by the protonated boroarsenate framework.
crystal-structures, phosphate, borate, borophosphate, exchange
0002-7863
17172-17173
Weller, Mark T.
36a60b56-049f-466c-a1d7-39d6b0d85ff4
Wiggin, Seth B.
e5668817-d0f1-42e8-8d35-c864722e9eb0
Weller, Mark T.
36a60b56-049f-466c-a1d7-39d6b0d85ff4
Wiggin, Seth B.
e5668817-d0f1-42e8-8d35-c864722e9eb0

Weller, Mark T. and Wiggin, Seth B. (2005) Boroarsenates: a framework motif and family templated on cations and anions. Journal of the American Chemical Society, 127 (49), 17172-17173. (doi:10.1021/ja055262l).

Record type: Article

Abstract

Molten salt reactions of NH4H2AsO4, H3BO3, and MX (M = Li, Na, K, Rb Cs, NH4 and X = F, Cl, Br) yield numerous new alkali metal and alkali metal salt templated three-dimensional boroarsenate and fluoroboroarsenate frameworks. The structures of these materials are formed from BO4 (BO3F) and As(O,OH)4 tetrahedra defining channels and interlayer regions containing either simple alkali metal cations or both cations and halide anions. These boroarsenate-based frameworks are unusual in comparison with other oxotetrahedral-based materials in that terminal OH, on As, may be present, decorating the inner surfaces of the channels, as in the 12-membered rings of K2[B(AsO3O)2H]. This unit also permits coordination to nonframework anions as well as cations, so that (Cs2[BAsO3OH]8[AsO4]2[CsCl4]Cl)2 (and its Br analogue) contains layers of [CsCl4]3- and Cl- ions separated and coordinated by the protonated boroarsenate framework.

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More information

Published date: 14 December 2005
Keywords: crystal-structures, phosphate, borate, borophosphate, exchange

Identifiers

Local EPrints ID: 20933
URI: http://eprints.soton.ac.uk/id/eprint/20933
ISSN: 0002-7863
PURE UUID: 95f803be-c96e-408c-9561-32f020e76076

Catalogue record

Date deposited: 28 Feb 2006
Last modified: 15 Jul 2019 19:25

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