TY - JOUR
T1 - Hydrothermal synthesis of polyoxotungstate clusters, surface-modified with M(II)-organonitrogen subunits
AU - Devi, R. Nandini
AU - Burkholder, Eric
AU - Zubieta, Jon
N1 - Funding Information:
This work was supported by a grant from the National Science Foundation (CHE9987471).
PY - 2003/5/15
Y1 - 2003/5/15
N2 - The hydrothermal reactions of Na2WO4·2H2O with secondary metal cation sources in the presence of an appropriate organonitrogen donor yield a series of molecular clusters. The compounds [Ni(bpy)3]1.5[Ni(bpy)2(H2O){H 3W12O40}]·0.5H2O (1·0.5H2O), [{Ni(phen)2(H2O)}2{H4W 12O40}]·4H2O (2.4H2O) and [{Cu(phen)2}4{H2W12O 40}] [{Cu(phen)2}2{H2W12O 40}]·3H2O (4.3H2O) are constructed from the α-metatungstate cluster [H2W12O40]6- core, covalently linked through oxo-bridges to secondary metal-organonitrogen ligand subunits. In the case of 1, the tungstate cluster is decorated by a single {Ni(bpy)2(H2O)}2+ subunit yielding an anionic bimetallic cluster, while in 2, two {Ni(phen)2(H2O)}2+ moieties are linked to the tungstate core to form a neutral bimetallic cluster. It is noteworthy that 4 is constructed of a cationic cluster, exhibiting a central tungstate core linked to four {Cu(phen)2}2+ units, and an anionic bimetallic polyoxoanion, featuring a tungstate core bonded to two {Cu(phen)2}2+ moieties. Compound 3, [{Cu(bpy)2}2W10O32]·2H 2O (3.2H2O) consists of two {Cu(bpy)2}2+ subunits linked to the opposite sides of a decatungstate cluster, while compound 5 contains {Co(bpy)3}3+ cations and the common Keggin anion, [CoW12O40]6-.
AB - The hydrothermal reactions of Na2WO4·2H2O with secondary metal cation sources in the presence of an appropriate organonitrogen donor yield a series of molecular clusters. The compounds [Ni(bpy)3]1.5[Ni(bpy)2(H2O){H 3W12O40}]·0.5H2O (1·0.5H2O), [{Ni(phen)2(H2O)}2{H4W 12O40}]·4H2O (2.4H2O) and [{Cu(phen)2}4{H2W12O 40}] [{Cu(phen)2}2{H2W12O 40}]·3H2O (4.3H2O) are constructed from the α-metatungstate cluster [H2W12O40]6- core, covalently linked through oxo-bridges to secondary metal-organonitrogen ligand subunits. In the case of 1, the tungstate cluster is decorated by a single {Ni(bpy)2(H2O)}2+ subunit yielding an anionic bimetallic cluster, while in 2, two {Ni(phen)2(H2O)}2+ moieties are linked to the tungstate core to form a neutral bimetallic cluster. It is noteworthy that 4 is constructed of a cationic cluster, exhibiting a central tungstate core linked to four {Cu(phen)2}2+ units, and an anionic bimetallic polyoxoanion, featuring a tungstate core bonded to two {Cu(phen)2}2+ moieties. Compound 3, [{Cu(bpy)2}2W10O32]·2H 2O (3.2H2O) consists of two {Cu(bpy)2}2+ subunits linked to the opposite sides of a decatungstate cluster, while compound 5 contains {Co(bpy)3}3+ cations and the common Keggin anion, [CoW12O40]6-.
KW - Bimetallic oxide clusters
KW - Copper tungstate
KW - Hydrothermal synthesis
KW - Nickel tungstate
KW - Polyoxotungstates
UR - http://www.scopus.com/inward/record.url?scp=0038732710&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0038732710&partnerID=8YFLogxK
U2 - 10.1016/S0020-1693(02)01472-X
DO - 10.1016/S0020-1693(02)01472-X
M3 - Article
AN - SCOPUS:0038732710
VL - 348
SP - 150
EP - 156
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
SN - 0020-1693
ER -