Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance upgrade on Thursday 4th of May 2017 from 8.00am to 9.00am (BST).

During this time our websites will be offline temporarily. If you have any questions please use the feedback button on this page. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 33, 2012
Previous Article Next Article

Mapping the synthesis of low nuclearity polyoxometalates from octamolybdates to Mn-Anderson clusters

Author affiliations

Abstract

A comprehensive study of the isomer-independent synthesis of TRIS ((HOCH2)3CNH2) Mn-Anderson compounds from Na2MoO4·2H2O, via the corresponding octamolybdate species, is presented. Three octamolybdate salts of [Mo8O26]4− in the β-isomer form, with tetramethylammonium (TMA), tetraethylammonium (TEA) and tetrapropylammonium (TPA) as the counter cation, were synthesised from the sodium molybdate starting material. Fine white powdery products for the three compounds were obtained, which were fully characterised by elemental analysis, TGA, solution and solid state Raman, IR and ESI-MS, revealing a set ratio of Na and organic cations for each of the three compounds; (TMA)2Na2[Mo8O26] (1), (TEA)3Na1[Mo8O26] (2) and (TPA)2Na2[Mo8O26] (3), and the analyses also confirmed that the three compounds all consisted of the octamolybdate in the β-isomeric form. ESI-MS analyses of 1, 2 and 3 show similar fragmentation for these β-isomers compared to the previously reported study for the α-isomer ((TBA)4[α-Mo8O26]) (A) in the synthesis of ((TBA)3[MnMo6O18((OCH2)3CNH2)2]) (B), and compounds 1, 2 and 3 were successfully used to synthesise equivalent TRIS Mn-Anderson compounds: (TMA)3[MnMo6O18((OCH2)3CNH2)2] (4), (TEA)3[MnMo6O18((OCH2)3CNH2)2] (5) and (TPA)2Na1[MnMo6O18((OCH2)3CNH2)2] (6), as well as Na3[MnMo6O18((OCH2)3CNH2)2] (7). This is the first example where symmetric organically-grafted Mn-Anderson compounds have been synthesised in DMF from anything but the {Mo8O26} α-isomer.

Graphical abstract: Mapping the synthesis of low nuclearity polyoxometalates from octamolybdates to Mn-Anderson clusters

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 09 May 2012, accepted on 16 Jul 2012 and first published on 16 Jul 2012


Article type: Paper
DOI: 10.1039/C2DT31008B
Citation: Dalton Trans., 2012,41, 10071-10079
  •   Request permissions

    Mapping the synthesis of low nuclearity polyoxometalates from octamolybdates to Mn-Anderson clusters

    M. H. Rosnes, C. Yvon, D. Long and L. Cronin, Dalton Trans., 2012, 41, 10071
    DOI: 10.1039/C2DT31008B

Search articles by author