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A new phosphotungstate-supported rhenium carbonyl derivative: synthesis, characterization and catalytic selective oxidation of thiophenes.
- Source :
- CrystEngComm; 12/21/2019, Vol. 21 Issue 47, p7322-7328, 7p
- Publication Year :
- 2019
-
Abstract
- A monomeric phosphotungstate-supported rhenium carbonyl derivative, [N(CH<subscript>3</subscript>)<subscript>4</subscript>]<subscript>6</subscript>H<subscript>4</subscript>[P<subscript>2</subscript>W<subscript>17</subscript>O<subscript>62</subscript>{Re(CO)<subscript>3</subscript>}<subscript>2</subscript>]·25H<subscript>2</subscript>O (1), has been synthesized in a conventional solution system and structurally characterized by single crystal X-ray diffraction crystallography, IR spectroscopy, thermogravimetric (TG) analyses, X-ray powder diffraction (XRPD), and electrospray ionization mass spectrometry (ESI-MS). To our knowledge, this is the first time that the {Re<subscript>2</subscript>} fragment existing in the polyoxoanion has been observed in polyoxometalate-supported metal carbonyl derivatives. Moreover, UV-vis spectroscopy was employed to elucidate the stability of the polyoxoanion, and its electrochemical properties were also investigated. In particular, complex 1 could act as an efficient homogeneous catalyst for selective oxidation of thiophenes. For example, dibenzothiophene (DBT) undergoes up to 99% conversion and 99% sulfone selectivity in acetonitrile with 30% H<subscript>2</subscript>O<subscript>2</subscript> as an oxidant. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14668033
- Volume :
- 21
- Issue :
- 47
- Database :
- Complementary Index
- Journal :
- CrystEngComm
- Publication Type :
- Academic Journal
- Accession number :
- 140032290
- Full Text :
- https://doi.org/10.1039/c9ce01124b