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Assembly of a Pentagonal Polyoxomolybdate Building Block, [Mo 6 O 21 ] 6– , into Crystalline MoV Oxides
Author(s) -
Sadakane Masahiro,
Endo Keisuke,
Kodato Katsunori,
Ishikawa Satoshi,
Murayama Toru,
Ueda Wataru
Publication year - 2013
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201201142
Subject(s) - polyoxometalate , orthorhombic crystal system , chemistry , crystallography , trigonal crystal system , raman spectroscopy , crystal structure , hydrothermal synthesis , hydrothermal circulation , inorganic chemistry , catalysis , biochemistry , physics , seismology , optics , geology
The building‐block assembly of polyoxometalates to form crystalline MoV‐based metal oxides is presented. Mixing of (NH 4 ) 6 Mo 7 O 24 and VOSO 4 in water with a pH value higher than 1.7 produced the ball‐shaped polyoxometalate [Mo 72 V 30 O 282 (H 2 O) 56 (SO 4 ) 12 ] 36– ({Mo 72 V 30 }) with 12 pentagonal [Mo 6 O 21 ] 6– polyoxomolybdate units connected to 30 [V=O] 2+ units, which was detected by using UV/Vis, Raman, and IR spectroscopy. Hydrothermal reaction of the precursor containing {Mo 72 V 30 } produced crystalline orthorhombic or trigonal MoV oxides. These oxides contain the pentagonal Mo unit in the crystal structure. The results indicate that the pentagonal polyoxomolybdate unit produced in the reaction precursor assembles with other Mo and V ions to form crystalline orthorhombic and trigonal MoV oxides.