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Structures and luminescence of mononuclear and dinuclear base-stabilized gold(I) pyrazolate complexes
 

Summary: Structures and luminescence of mononuclear and dinuclear
base-stabilized gold(I) pyrazolate complexes
Ahmed A. Mohamed a
, Tiffany Grant a
, Richard J. Staples b
, John P. Fackler Jr. a,*
a
Laboratory for Molecular Structure and Bonding, Department of Chemistry, Texas A&M University, College Station, TX 77843-3255, USA
b
Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA
Received 12 September 2003; accepted 6 December 2003
This paper recognizes a great scientist and a true gentleman, Helmut Werner
Abstract
The mono- and dinuclear base-stabilized gold(I) pyrazolate complexes, (PPh3)Au(l-3,5-Ph2pz)) (1), (TPA)Au(3,5-Ph2pz),
TPA 1,3,5-triaza-7-phophaadamantane (2), [(PPh3)2Au(l-3,5-Ph2pz)]NO3 (3) and [(dppp)Au(l-3,5-Ph2pz)]NO3, dppp bis-
(diphenylphosphino)propane (4), have been synthesized and structurally characterized. The mononuclear gold(I) complexes 1 and 2
show intermolecular Au Au interactions of 3.1540(6) and 3.092(6) A, while the dinuclear gold(I) complexes 3 and 4 show an
intramolecular Au Au distances of 3.3519(7) and 3.109(2) A, respectively, typical of an aurophilic attraction. Complexes 14
exhibit luminescence at 77 K when excited with ca. 333 nm UV light with an emission maximum at ca. 454 nm. The emission has
been assigned to ligand-to-metal charge transfer, LMCT, based upon the vibronic structure that is observed.

  

Source: Abdou, Hanan E. - Department of Chemistry, Texas A&M University

 

Collections: Chemistry