Controllable growth of chains and grids from polyoxomolybdate building blocks linked by silver(I) dimers

Abbas, H., Pickering, A.L., Long, D.-L. , Kögerler, P. and Cronin, L. (2005) Controllable growth of chains and grids from polyoxomolybdate building blocks linked by silver(I) dimers. Chemistry: A European Journal, 11(4), pp. 1071-1078. (doi:10.1002/chem.200401088)

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Molecular growth processes utilizing a β-octamolybdate synthon and {Ag2} dimers are described and the directing influence of "encapsulating" cations and coordinating solvent is also demonstrated. The growth of two 1D chains, (nBu4N)2n[Ag2Mo8O26]n (1) and (nBu4N)2n[Ag2Mo8O26(CH3CN)2]n (2), is achieved when nBu4N+ ions are used, and the diameter of the chains can be expanded by the coordination of CH3CN solvent (2). The formation of a type of gridlike structure in which 1D chains are crossed-over each other in alternatively packed layers is achieved in DMSO as the solvent; DMSO acts as a linking group to give (nBu4N)2n[Ag2Mo8O26(dmso)2]n (3), which, similar to 1 and 2, still incorporates the Bu4N+ ions that exert an "encapsulating" influence. However, in (HDMF)n[Ag3(Mo8O26)(dmf)4]n (4) the relatively bulky Bu4N+ ions are exchanged for protonated DMF cations, thereby allowing the chains to condense to a 2D array. The building block concept is further enforced by the isolation of a "monomeric" unit (Ph4P)2[Ag2Mo8O26(dmso)4] (5), which is isolated when the Ph4P+ ions are so "encapsulating" as to prevent aggregation of the {Ag-Mo8-Ag} building blocks. The nature of the Ag … Ag dimers in each of the compounds 1-4 is examined by DFT calculations and the interplay between these Ag-Ag interactions and the structure types is described.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Abbas, Miss Hamera and Long, Dr De Liang and Cronin, Professor Leroy
Authors: Abbas, H., Pickering, A.L., Long, D.-L., Kögerler, P., and Cronin, L.
Subjects:Q Science > QD Chemistry
College/School:College of Science and Engineering > School of Chemistry
University Centres > Glasgow Materials Research Initiative
Journal Name:Chemistry: A European Journal
Journal Abbr.:Chem. Eur J.
ISSN (Online):1521-3765

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