Controlled assembly of two new bicapped bisupporting Keggin-polyoxometalate derivatives: [M(2,2'-bpy){sub 2}(H{sub 2}O)]{sub 2}[SiMo{sup VI}{sub 8}Mo{sup V}{sub 4}V{sup IV}{sub 2}O{sub 42}] (M=Co, Zn)
Two new neutral bicapped bisupporting Keggin-polyoxometalate derivatives: [M(2,2'-bpy){sub 2}(H{sub 2}O)]{sub 2}[SiMo{sup VI}{sub 8}Mo{sup V}{sub 4}V{sup IV}{sub 2}O{sub 42}] (M=Co 1, Zn 2; 2,2'-bpy=2,2'-bipyridine), have been synthesized under hydrothermal conditions by directly using H{sub 4}SiMo{sub 12}O{sub 40} as starting materials. Crystal data for compound 1: C{sub 40}H{sub 36}Co{sub 2}Mo{sub 12}N{sub 8}O{sub 44}SiV{sub 2}, triclinic, space group P1-bar , a=11.884(2)A, b=12.459(3)A, c=12.652(3)A, {alpha}=71.02(3){sup o}, {beta}=74.51(3){sup o}, {gamma}=86.74(3){sup o}, V=1706.3(6)A{sup 3}, Z=1; for compound 2, C{sub 40}H{sub 36}Mo{sub 12}N{sub 8}O{sub 44}SiV{sub 2}Zn{sub 2}, triclinic, space group P1-bar , a=11.879(2)A, b=12.469(3)A, c=12.635(3)A, {alpha}=71.28(3){sup o}, {beta}=74.78(3){sup o}, {gamma}=86.60(3){sup o}, V=1709.6(6)A{sup 3}, Z=1. The studies of the electrochemical property of compounds 1 and 2 exhibit similar redox behavior to the parent [(C{sub 4}H{sub 9}){sub 4}N]{sub 4}SiMo{sub 12}O{sub 40}, undergoing three two-electron reversible reductions. Variable-temperature magnetic susceptibility measurement of compound 1 demonstrates the presence of antiferromagnetic interactions.
- OSTI ID:
- 20725988
- Journal Information:
- Journal of Solid State Chemistry, Vol. 178, Issue 6; Other Information: DOI: 10.1016/j.jssc.2005.04.005; PII: S0022-4596(05)00156-8; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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