Crystal structures of cerium molybdenum and uranium molybdenum heteropoly acids

Spectral properties of Eu(III) complexes with heteropolyanions immobilised in xerogel matrices

“…[10]. The composition of Eu:HPA = 2:1 in Eu 2 TeMo 6 O 24 ·17H 2 O (II) was obtained from (TeMo 6 O 24 ) [11], as described in [12,13]. Then, the Eu(III) complexes were entrapped in sol-gel matrices.…”

Present General Status of Understanding of Heteropoly Electrolytes and a Tracing of Some Major Highlights in the History of Their Elucidation

“…The two electrons are delocalized over the whole coordination sphere H 4 [SiMo 12 O 40 ]·13H 2 O, which shows the anions within a hydrate envelope that contains H 5 O 2 + and H 7 O 3 + ; and the new compound (NH 4 ) 3 H[ThUMo 12 O 42 ]· 15H 2 O, for which the MO diagram was constructed.…”

Structure and Solution Speciation of UIV Linked Phosphomolybdate (MoV) Clusters

“…Such putative clusters would be fascinating, providing opportunities to investigate d-f valence orbital hybridization and can also result in functional properties such as magnetism. Numerous polyoxotungstate clusters (vacant Keggin and Dawson type structures) associated with tetravalent uranium have been described in the literature. − In contrast, the polyoxomolybdates containing An 4+ are quite rare, only the polyoxomolybdate cluster [U IV Mo VI 12 O 42 ] 8– and their derivatives have been reported. − While this synthetic challenge is yet to be conquered, we describe here structural characterization of a phase featuring the tetraphosphohexamolybdate cluster (noted {Mo 6 P 4 }) linked into chains with alternating U 4+ and Na + cations, [UNa­(Mo 6 P 4 O 31 H 7 ) 2 ]·5Na·(H 2 O) n ( NaUMo 6 ). Additionally, a structure with dimers of Na-linked tetraphosphohexamolybdate is presented, [Na­(Mo 6 P 4 O 31 H 10 ) 2 ]·5Na·(H 2 PO 4 )·(H 2 O) n ( NaMo 6 ).…”