|
Z. Naturforsch. 2013,
68b, 569 – 574
doi:10.5560/ZNB.2013-3075
Isolation, Optical Properties and Core Structure of a Water-soluble, Phosphine-stabilized [Au9]3+ Cluster
1 Institute of Inorganic Chemistry, RWTH Aachen University, 52074 Aachen, Germany
2 JARA – Fundamentals of Future Information Technologies, RWTH Aachen University, 52074 Aachen, Germany
3 Institute of Inorganic Chemistry, University Duisburg-Essen, 45127 Essen, Germany
Reprint requests to Prof. Dr. Ulrich Simon. Fax: +49 241 80 99003. E-mail:
ulrich.simon@ac.rwth-aachen.de
Received February 27, 2013 / published online Juli 2, 2013
Dedicated to Professor Heinrich Nöth on the occasion of his 85th birthday
A water-soluble, crystalline Au9 cluster compound stabilized with sodium (m-sulfonatophenyl)diphenylphosphine (TPPMSNa) was obtained during the NaBH4 reduction of [Au(TPPMSNa)Cl]·H2O in ethanol. Characterization by optical extinction spectroscopy, single-crystal X-ray diffraction in combination with energy dispersive X-ray diffraction led to the preliminary formula Na(8−x)[Au9(TPPMS)8]Cl(3−x) · nH2O (0 ≤ x ≤ 3, n ≈ 16) with the cluster core in crown conformation. 31P{1H} nuclear magnetic resonance spectroscopy revealed one singlet at 57.3 ppm. This is the first example where gold clusters stabilized by TPPMSNa formed crystals which where suitable for core structure determination.
Key words: Cluster Compounds, Gold, Structure Elucidation, Nanotechnology