Bartenbach D, Popescu R, Gerthsen D, Feldmann C. [Sm
6O
4(cbz)
10(thf)
6]·2C
7H
8: A Polynuclear Samarium Oxo Cluster Obtained from Carbazole-Driven Oxidation of Samarium Nanoparticles.
Inorg Chem 2022;
61:3072-3077. [PMID:
35130701 DOI:
10.1021/acs.inorgchem.1c03238]
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Abstract
Zerovalent samarium nanoparticles (1.7 ± 0.2 nm in size) are used as the starting material to prepare single crystals of the novel polynuclear samarium oxo cluster [Sm6O4(cbz)10(thf)6]·2C7H8. The reaction is performed by oxidation with carbazole (CbzH) in tetrahydrofuran (THF) at 50 °C with subsequent crystallization in toluene (C7H8). The oxo cluster contains noncharged molecular units with a central Sm6O4 core. Single-crystal structure analysis and infrared spectroscopy confirm the oxidation of CbzH with the formation of (cbz)-. Polynuclear carbazole complexes are generally rare and here prepared using metal nanoparticles as a reactive starting material for the first time. The reaction with CbzH as a sterically demanding ligand exemplarily shows the feasibility of rare-earth-metal nanoparticles for obtaining new compounds with complex composition and structure.
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