Spectroscopic gold complexes

A mononuclear gold complex catalyst supported on MgO spectroscopic characterization during ethylene... 

A multitude of related polynuclear gold complexes have been prepared utilizing a range of bridging ligands, and their spectroscopic properties have been examined [71]. An example involving 16 individual Au(I) ions deserves mention because of its extreme complexity [72],... 

Guzman J, Gates BC (2004) A mononuclear gold complex catalyst supported on MgO Spectroscopic characterization during ethylene hydrogenation catalysis. J Catal 226 111... 

Uson, R., Laguna, A., De la Orden, M.U., Parish, R.V. and Moore, L.S. (1985) Synthesis and gold-197 Moessbauer spectroscopic studies of dihalo (pentafluorophenyl) (bidentate ligand) gold(III) complexes. JoumoJ of Organometallic Chemistry, 282(1), 145-148. 

The discriminatory emission properties between two-coordinate d ° gold(I) complexes and their respective three-coordinate counterparts have been demonstrated in the literature [6, 10-13]. As discussed in the later sections, Che and coworkers have rationalized that the extraordinarily large Stokes shift of the visible emission of [Au2(diphosphine)2] from the [5da 6pa] transition is due to the exciplex formation ofthe excited state with solvent or counterions [6]. Fackler [14—16] reported the photophysical properties of monomeric [AUL3] complexes, which show visible luminescence with large Stokes shifts (typically lOOOOcm ), suggesting significant excited-state distortion. Gray et al. [10] examined the spectroscopic properties of... 

A series of dinuclear gold(I)-carbene complexes of imidazolium-linked cydo-phanes and related acyclic bis(imidazolium) salts have been synthesized and their spectroscopic properties were examined by Baker and coworkers [31]. X-ray stmctural analysis of the cation in 1 and 2 (Scheme 5.1) revealed intramolecular Au - Au contacts of 3.5425(6) and 3.0485(3) A respectively. The electronic absorption... 

For di- and polynuclear gold(I) complexes vith two Au(I) centers held in close proximity, a lower energy 5denergy from its mononuclear counterpart is a spectroscopic signature [2, 7, 44]. Excitation to the 5da —> 6pG transition gives rise to a [5da, 6pa] excited state having a formal... 

McCleskey, T.M. and Gray, H.B. (1992) Emission spectroscopic properties of 1,2-bis(dicyclohexylphosphino)ethane complexes of gold(l). Inorganic Chemistry, 31, 1733-1734. 

Barnard, P.J., Baker, M.V., Bemers-Price, S.J., Skelton, B.W. and White, A.H. (2004) Dinudear gold(I) complexes of bridging bidentate carbene ligands Synthesis, structure and spectroscopic characterisation. Dolton Transactions, 1038-1047. 

Chan, M.C.-W. and Che, C.-M. (1998) Application of 2,6-diphenylpyridine as a tridentate [C N C] dianionic ligand in organogold(III) chemistry. Structural and spectroscopic properties of mono- and binuclear transmetalated gold(III) complexes. Organometallics, 17, 3505-3511. 

---