Gold(I) Pyrazolate Clusters: The Structure and Luminescence of the Tetranuclear, Base-Stabilized [(dppm)2Au4(3,5-Ph2Pz)2](NO3)2·H2O
- Mohamed, A.A. 2
- López-De-Luzuriaga, J.M. 1
- Fackler Jr. 2
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1
Universidad de La Rioja
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2
Texas A&M University
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ISSN: 1040-7278
Datum der Publikation: 2003
Ausgabe: 14
Nummer: 1
Seiten: 61-70
Art: Artikel
Andere Publikationen in: Journal of Cluster Science
Zusammenfassung
The tetranuclear Au(I) pyrazolate complex, [(dppm)2Au 4(3,5-Ph2Pz)2](NO3) 2· H2O, 1, has been synthesized and structurally characterized. It is the first tetranuclear pyrazolate of Au(I) to have been found, although the trinuclear pyrazolates of Au(I) are well known. Complex 1 exhibits luminescence at 77 K when excited at 333 nm with an emission maximum at 454 nm. The emission has been assigned to ligand to metal charge transfer, LMCT, based upon the vibronic structure that is observed. The complex crystallizes in the monoclinic space group P21/c, with a = 19.33(3) Å, b = 20.26(3) Å, c = 19.80(3) Å, β = 106.74(2)°, V = 7425(17) Å3, Z = 8, and R = 0.058. The Au⋯Au distances are Au(1)⋯Au(4) = 3.185(3) Å, Au(1)⋯Au(2) = 3.230(3) Å, Au(2)⋯Au(3) = 3.079(3) Å, and Au(3)⋯Au(4) = 3.280(3) Å.