A novel dimeric Ni-substituted β-keggin silicotungstate:: Structure and magnetic properties of K12[{β-SiNi2W10O36(OH)2(H2O)}2]•20H2O

被引:130
作者
Kortz, U
Jeannin, YP
Tézé, A
Hervé, G
Isber, S
机构
[1] Univ Versailles, Inst React Electrochim & Microporosites, UMR C0173, F-78035 Versailles, France
[2] Univ Paris 06, ESA CNRS 7071, Chim Met Transit Lab, F-75252 Paris, France
[3] Amer Univ Beirut, Dept Phys, Beirut 0236, Lebanon
关键词
D O I
10.1021/ic990008d
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The novel dimeric polyoxometalate [{beta-SiNi2W10O36(OH)(2)(H2O)}(2)](12-) (1) has been synthesized and characterized by IR spectroscopy, polarography, elemental analysis, thermogravimetric analysis, and magnetic measurements. An X-ray single-crystal analysis was carried out on K-12[{beta-SiNi2W10O36(OH)(2)(H2O)}(2)]. 20H(2)O, which crystallizes in the monoclinic system, space group P2(1)/n, with a = 13.701(4) Angstrom, b = 24.448(11) Angstrom, c = 13.995(5) Angstrom, beta = 99.62(3) degrees, and Z = 4. The anion consists of two [beta-SiNi2W10O36(OH)(2)(H2O)] Keggin moieties linked via two OH bridging groups, leading to a planar Ni-2(OH)(2) unit. The two half-units are related by an inversion center and each contain one Ni atom in the rotated triad. The formation of the new anion involves insertion, isomerization, and dimerization. Magnetic measurements show that the central Ni-4 unit exhibits ferromagnetic (J' = 4.14 cm(-1)) as well as weak antiferromagnetic (J = -0.65 cm(-1)) Ni-Ni exchange interactions.
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页码:3670 / 3675
页数:6
相关论文
共 36 条
[1]  
Abragam A., 1970, ELECT PARAMAGNETIC R
[2]   BOND-VALENCE PARAMETERS OBTAINED FROM A SYSTEMATIC ANALYSIS OF THE INORGANIC CRYSTAL-STRUCTURE DATABASE [J].
BROWN, ID ;
ALTERMATT, D .
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1985, 41 (AUG) :244-247
[3]   DISUBSTITUTED TUNGSTOSILICATES .1. SYNTHESIS, STABILITY, AND STRUCTURE OF THE LACUNARY PRECURSOR POLYANION GAMMA-SIW10O368- [J].
CANNY, J ;
TEZE, A ;
THOUVENOT, R ;
HERVE, G .
INORGANIC CHEMISTRY, 1986, 25 (13) :2114-2119
[4]  
CANNY J, 1991, INORG CHEM, V30, P946
[5]   1ST FERROMAGNETIC INTERACTION IN A HETEROPOLY COMPLEX - [COII4O14(H2O)2(PW9O27)2]10- - EXPERIMENT AND THEORY FOR INTRAMOLECULAR ANISOTROPIC EXCHANGE INVOLVING THE 4 CO(II) ATOMS [J].
CASANPASTOR, N ;
BASSERRA, J ;
CORONADO, E ;
POURROY, G ;
BAKER, LCW .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (26) :10380-10383
[6]   Increasing the nuclearity of magnetic polyoxometalates. Syntheses, structures, and magnetic properties of salts of the heteropoly complexes [Ni3(H2O)3(PW10O39)H2O]7-, [Ni4(H2O)2(PW9O34)2]10-, and [Ni9(OH)3(H2O)6(HPO4)2(PW9O34)3]16- [J].
Clemente-Juan, JM ;
Coronado, E ;
Galán-Mascarós, JR ;
Gómez-García, CJ .
INORGANIC CHEMISTRY, 1999, 38 (01) :55-63
[7]   POLYOXOMETALATES - FROM MAGNETIC CLUSTERS TO MOLECULAR MATERIALS [J].
CORONADO, E ;
GOMEZGARCIA, CJ .
COMMENTS ON INORGANIC CHEMISTRY, 1995, 17 (05) :255-281
[8]   TRIVACANT HETEROPOLYTUNGSTATE DERIVATIVES .3. RATIONAL SYNTHESES, CHARACTERIZATION, TWO-DIMENSIONAL W-183 NMR, AND PROPERTIES OF P2W18M4(H2O)2O68(10-) AND P4W30M4(H2O)2O112(16-)(M = CO, CU, ZN) [J].
FINKE, RG ;
DROEGE, MW ;
DOMAILLE, PJ .
INORGANIC CHEMISTRY, 1987, 26 (23) :3886-3896
[9]   MOLECULAR MAGNETISM - A BASIS FOR NEW MATERIALS [J].
GATTESCHI, D .
ADVANCED MATERIALS, 1994, 6 (09) :635-645
[10]  
Gatteschi D, 1991, Magnetic molecular materials