title: Correlation between photophysical parameters and gold-gold distances in gold(I) (4-pyridyl)ethynyl complexes.
abstract: The systematic analysis of the luminescence of a series of alkynyl gold derivatives with general formulas [(diphos)(AuC≡Cpy)(2)] (diphosphane =2,2'-bis(diphenylphosphanyl)propane or dppip (1), bis(diphenylphosphanyl)acetylene or dppa (2), 1,2-bis(diphenylphosphanyl)ethane or dppe (3) and 1,4-bis(diphenylphosphanyl)butane or dppb, (4), has shown a straightforward correlation between the Au(I)···Au(I) distance and the emission quantum yields and decaytimes. The analysis of the decaytimes, quantum yields and thus, the corresponding calculated rate constants demonstrated the existence of a correlation between Au(I)···Au(I) distance and the radiative rate constant for the deactivation of the emissive triplet states. It was concluded that the increased emission of these compounds results from the increase in spin-orbit coupling that favors the spin forbidden transition to the singlet ground state.
authors: Departament de Química Inorgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.
authors: Laura
authors: L
authors: Rodríguez
authors: Montserrat
authors: M
authors: Ferrer
authors: Ramon
authors: R
authors: Crehuet
authors: Josep
authors: J
authors: Anglada
authors: João Carlos
authors: JC
authors: Lima
mesh_terms: D000480:Alkynes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006046:Gold / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D050607:Organogold Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D055668:Photochemical Processes; D011789:Quantum Theory
chemical_list: D000480:Alkynes; D050607:Organogold Compounds; D006046:Gold