Manganese Mono-Substituted Borotungstate: Characterization and Catalytic Application

authors	Balula, SS; Santos, ICMS; Barbosa, ADS; Schlindwein, W; Cavaleiro, AMV; de Castro, B; Cunha-Silva, L
editors	Pinto, AMP; Pouzada, AS
nationality	International
journal	ADVANCED MATERIALS FORUM VI, PTS 1 AND 2
author keywords	Polyoxometalate; EXAFS spectroscopy; epoxidation
keywords	KEGGIN-TYPE POLYOXOTUNGSTATES; METAL SUBSTITUTED POLYOXOTUNGSTATES; HIGH-VALENT MANGANESE; HYDROGEN-PEROXIDE; OXIDATION
abstract	The Keggin-type TBA(4)H(2)[BW11Mn(H2O)O-39]center dot H2O (BW11Mn) compound was isolated and characterized. The first sphere of coordination for the manganese atom was determined by EXAFS analysis. Six oxygen atoms were found in the range of 1.80-2.64 angstrom from the manganese. BW11Mn showed to be an active, efficient and selective catalyst for cis-cyclooctene (la) epoxidation in the presence of stoichiometric quantities of H2O2. After 5 h of reaction almost complete conversion was achieved (86% of conversion). Selectivity was always 100 % for the epoxide.
publisher	TRANS TECH PUBLICATIONS LTD
issn	0255-5476
year published	2013
volume	730-732
beginning page	975
ending page	+
digital object identifier (doi)	10.4028/www.scientific.net/MSF.730-732.975
web of science category	Materials Science, Multidisciplinary
subject category	Materials Science
unique article identifier	WOS:000315545200161