Discovery of a Neutral 40-Pd II -Oxo Molecular Disk, [Pd 40 O 24 (OH) 16 {(CH 3 ) 2 AsO 2 } 16 ]: Synthesis, Structural Characterization, and Catalytic Studies

• Published in: Inorganic chemistry Vol. 60; no. 22; pp. 17339 - 17347
• Main Authors: Bhattacharya, Saurav, Ma, Xiang, Mougharbel, Ali S., Haouas, Mohamed, Su, Pei, Espenship, Michael Forrester, Taffa, Dereje H., Jaensch, Helge, Bons, Anton-Jan, Stuerzer, Tobias, Wark, Michael, Laskin, Julia, Cadot, Emmanuel, Kortz, Ulrich
• Format: Journal Article
• Language: English
• Published: American Chemical Society 15.11.2021
• Subjects: Catalysis; Chemical Sciences; Coordination chemistry; Organic chemistry
• ISSN: 0020-1669; 1520-510X
• DOI: 10.1021/acs.inorgchem.1c02749

We report on the synthesis and structural characterization of the giant discrete and neutral molecular disk, [Pd40O24(OH)16{(CH3)2AsO2}16] (Pd40), 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. Pd40, which is the largest 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 [SiW12O40] 4or [GeW12O40] 4-. 1 H and 13 C NMR as well as 1H-DOSY NMR studies indicate that Pd40 is stable in aqueous solution, which is also confirmed by ESI-MS studies. Pd40 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.