期刊
JOURNAL OF COORDINATION CHEMISTRY
卷 61, 期 15, 页码 2428-2436出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00958970801914793
关键词
polyoxometalates; lanthanide; sandwich-type; hydrothermal synthesis
A heteropolyoxotungstate, [Cu(en)(2)](2)H-8[Gd(PW11O39)(2)] (H(2)en)(0.5) center dot 3H(2)O (1), has been hydrothermally synthesized and characterized by IR, XPS, TGA and single-crystal X-ray diffraction. Compound 1 crystallizes in the triclinic system, space group P (1) over bar, with a = 12.651(2) angstrom(3), b = 20.559(3) angstrom(3), c = 21.729(3) angstrom(3), alpha = 71.379(2), beta = 82.829(2), gamma = 75.532(2)degrees, V = 5179.5(14) angstrom(3), Z = 2, R-1 = 0.0702 and R-2 = 0.1479. The heteropolyanion is composed of two monovacant [alpha-PW11O39](7-) Keggin moieties linked via a Gd atom leading to a sandwich-type structure. The Gd center is in a distorted square antiprismatic coordination environment with eight oxygen atoms, four from each of the two [alpha-PW11O39](7-) moieties.
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