Citation:
WANG Jing-Ping, NIU Jing-Yang, DANG Dong-Bin, BO Yan. Synthesis,Characterization,Crystal Structure and Nonlinear Optical Property of a Mixed-Valence Heteropolyoxometallate[[C10H10N]4PMo9W3O40·2DMF[J]. Chinese Journal of Applied Chemistry,
;2002, 19(2): 144-148.
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The crystal structure of a mixed valence compound,[C10H10N]4PMo9W3O40·2DMF is reported. The crystal is monoclinic with space group P21/n, a=1.490 6(4)nm, b=1.249 6(1) nm, c=1.765 2(5) nm, U=98.16(1)°, V=3.254 7(13) nm3, Z=2, Dc=2.791 g/nm3,Mr=2.735 84, R=0.053 1 and Rw=0.136 2. A certain change in bond distance is found for all of anions and the PO4 tetrahedron is markedly distorted after displacement of molybdenum atom by tungsten. The reduced electrons are delocalized among the molybdenum atoms and the degree of delocalization decreases with the decrease in temperature. The compound exhibits the third order nonlinear optical properties,with the third order susceptibility being i(3)=1.48×10-13esu.
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Keywords:
- mixed-valence,
- heteropoly oxometallate,
- crystal structure
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