Photophysical Properties of Chlorotriethylphosphinegold(I)
Document Type
Article
Publication Date
1-1-2010
Abstract
Spectroscopic and quantum mechanical studies of the Et(3)PAuCl complex were performed to characterize the effect of aurophilicity on the optical properties. When excited with UV light at low temperature, the crystalline complex produced a deep luminescence in both the blue (high-energy) and red (low-energy) regions of the spectrum. The intensity of the low-energy luminescence was markedly reduced in the powdered state and quenched in the solution state. Time-dependent density functional theory (TD-DFT) calculations on electronic structures of both the ground and excited states of aggregates [Et(3)PAuCl](n) (n = 1 - 3) indicated that the low-energy luminescence was attributable to Au-centered transitions, which are significantly affected by aurophilic interactions. By contrast, the high-energy luminescence appeared to be independent of the state of the complex and was strongly associated with the charge transfer from Cl to Au.
Keywords
Chlorotriethylphosphinegold(I), Optical properties, Aurophilic interactions, Au-centered transitions, Charge transfer
Publication Title
Bulletin of the Korean Chemical Society
Volume
31
Issue
8
Publisher
Korean Chemical Soc
Publisher Location
635-4 YEOGSAM-DONG, KANGNAM-GU, SEOUL 135-703, SOUTH KOREA