| Autor: |
Bhattacharya S; Department of Life Sciences and Chemistry, Jacobs University, Campus Ring 1, 28759 Bremen, Germany., Ma X; Department of Life Sciences and Chemistry, Jacobs University, Campus Ring 1, 28759 Bremen, Germany., Mougharbel AS; Department of Life Sciences and Chemistry, Jacobs University, Campus Ring 1, 28759 Bremen, Germany., Haouas M; Institut Lavoisier de Versailles, UMR 8180 CNRS, UVSQ, Université Paris-Saclay, Versailles 78035, France., Su P; Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States., Espenship MF; Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States., Taffa DH; Institute of Chemistry, Carl von Ossietzky University Oldenburg, 26129 Oldenburg, Germany., Jaensch H; Global Chemical Research, ExxonMobil Chemical Europe Inc., 1831 Machelen, Belgium., Bons AJ; Global Chemical Research, ExxonMobil Chemical Europe Inc., 1831 Machelen, Belgium., Stuerzer T; Bruker AXS GmbH, Oestliche Rheinbrueckenstrasse 49, 76187 Karlsruhe, Germany., Wark M; Institute of Chemistry, Carl von Ossietzky University Oldenburg, 26129 Oldenburg, Germany., Laskin J; Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States., Cadot E; Institut Lavoisier de Versailles, UMR 8180 CNRS, UVSQ, Université Paris-Saclay, Versailles 78035, France., Kortz U; Department of Life Sciences and Chemistry, Jacobs University, Campus Ring 1, 28759 Bremen, Germany. |
| Abstrakt: |
We report on the synthesis and structural characterization of a giant, discrete, and neutral molecular disk, [Pd 40 O 24 (OH) 16 {(CH 3 ) 2 AsO 2 } 16 ] ( Pd 40 ), comprising a 40-palladium-oxo core that is capped by 16 dimethylarsinate moieties, resulting in a palladium-oxo cluster (POC) with a diameter of ∼2 nm. Pd 40 , which is the largest known neutral Pd-based oxo cluster, can be isolated either as a discrete species or constituting a 3D H-bonded organic-inorganic framework (HOIF) with a 12-tungstate Keggin ion, [SiW 12 O 40 ] 4- or [GeW 12 O 40 ] 4- . 1 H and 13 C NMR as well as 1 H-DOSY NMR studies indicate that Pd 40 is stable in aqueous solution, which is also confirmed by ESI-MS studies. Pd 40 was also immobilized on a mesoporous support (SBA15) followed by the generation of size-controlled Pd nanoparticles (diameter ∼2-6 nm, as based on HR-TEM), leading to an effective heterogeneous hydrogenation catalyst for the transformation of various arenes to saturated carbocycles. |
