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Hierarchy of structures in the family of amine templated open-framework gallium arsenates

Rao, Koteswara V and Prabhu, Ramanath and Natarajan, Srinivasan (2010) Hierarchy of structures in the family of amine templated open-framework gallium arsenates. In: Inorganica Chimica Acta, 363 (12). pp. 2929-2937.

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Official URL: http://dx.doi.org/10.1016/j.ica.2010.02.033

Abstract

Five new gallium arsenate compounds C2N2H10]Ga(H2AsO4)(HAsO4)(2)]center dot H2O, I; C2N2H10]Ga(OH)(AsO4)](2), II; C2N2H10]GaF(AsO4)](2), III; C3N2H12]Ga(OH)(AsO4)](2), IV; Ga2F3(AsO4)(HAsO4)]center dot 2H(3)O, V, have been synthesized under hydrothermal conditions and the structures determined employing single crystal X-ray diffraction studies. All the structures consist of octahedral gallium and tetrahedral arsenate units connected together forming a hierarchy of structures. Thus, one- (I), two- (II and IV) and three-dimensionally (III and V) extended structures have been observed. The Ga-O(H)/F-Ga connectivity in some of the structures suggests the coordination requirements posed by the octahedral gallium in these compounds. The observation of only one type of secondary building unit in the structures of III (SBU-4) and V (spiro-5) is unique and noteworthy. All the compounds have been characterized by a variety of techniques that include powder XRD, IR, and TGA. (C) 2010 Elsevier B. V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Hydrothermal synthesis; Gallium arsenates; Crystal structures; GIS topology; Characterization.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 26 Oct 2010 07:21
Last Modified: 26 Oct 2010 07:21
URI: http://eprints.iisc.ernet.in/id/eprint/33427

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