Correlation between photophysical parameters and gold-gold distances in gold(I) (4-pyridyl)ethynyl complexes

Laura Rodríguez, Montserrat Ferrer, Ramon Crehuet, Josep Anglada, João Carlos Lima

Research output: Contribution to journalArticlepeer-review

63 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)7636-7641
Number of pages6
JournalInorganic Chemistry
Volume51
Issue number14
DOIs
Publication statusPublished - 16 Jul 2012

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