31P NMR study of peroxophosphatotunstates in aqueous/acetonitrile mixed media

INOR 704

Yusuke Hamamatsu, Shinya Kitaura, Kiyotaka Kihara, Takahiro Terada, Masato Hashimoto, mh1043@sys.wakayama-u.ac.jp, and Seichi Okeya, okeya@sys.wakayama-u.ac.jp. Department of Material Science and Chemistry, Faculty of Systems Engineering, Wakayama University, Sakaedani 930, Wakayama, 640-8510, Japan
Three structurally related peroxophosphatotungstates, [(HPO4)2W3O6(O2)3]4- a, [(HPO4)2W6O15(O2)4]6- b and [(HPO4)2(PO4)W6O12(O2)6]7- c were isolated from aqueous/acetonitrile mixed media and were structurally analyzed (see figures). Each anion has L-shaped tritungstate unit(s) coordinated by phosphate group(s) as bipodal or tripodal ligand(s). The anion b showed a single line in solid state 31P NMR whereas two (a) and three (c) resonances were observed reflecting different environment of each P atom in the crystals. The formation and crystallization behaviors of these anions as well as their possible protonation or exchanging processes were followed by solution 31P NMR and will be discussed.

 

Polyoxometalates and Related Clusters in Chemistry and Nanoscience
7:00 PM-10:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster

Division of Inorganic Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007