title: Cyclic Ti9 keggin trimers with tetrahedral (PO4) or octahedral (TiO6) capping groups.
abstract: We have synthesized the cyclic Ti 9 Keggin trimers [(alpha-Ti 3PW 9O 38) 3(PO 4)] (18-) ( 1) and [(alpha-Ti 3SiW 9O 37OH) 3(TiO 3(OH 2) 3)] (17-) ( 2), which are both composed of three (Ti 3XW 9O 37) units (X = P or Si) linked via three Ti-O-Ti bridges and a capping group, which is either tetrahedral PO 4 ( 1) or octahedral TiO 6 ( 2). Polyanions 1 and 2 were fully characterized in the solid state (IR, X-ray diffraction, thermogravimetric and elemental analyses) and in solution ( (31)P or (183)W NMR).
authors.affiliation: School of Engineering and Science, Jacobs University, P.O. Box 750561, 28725 Bremen, Germany.
authors.forename: Ghada A
authors.initials: GA
authors.lastname: Al-Kadamany
authors.forename: Firasat
authors.initials: F
authors.lastname: Hussain
authors.forename: Sib Sankar
authors.initials: SS
authors.lastname: Mal
authors.forename: Michael H
authors.initials: MH
authors.lastname: Dickman
authors.forename: Nathalie
authors.initials: N
authors.lastname: Leclerc-Laronze
authors.forename: Jérôme
authors.initials: J
authors.lastname: Marrot
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Cadot
authors.forename: Ulrich
authors.initials: U
authors.lastname: Kortz