Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/43432
Title: Deciphering photoluminescence dynamics and reactivity of the luminescent metal-metal-bonded excited state of a binuclear gold(I) phosphine complex containing open coordination sites
Authors: Ma, C
Chan, CTL
To, WP
Kwok, WM 
Che, CM
Keywords: Femtosecond time-resolved fluorescence
Gold
Photocleavage
Substrate binding
Transient absorption
Issue Date: 2015
Publisher: Wiley-VCH
Source: Chemistry - a European journal, 2015, v. 21, no. 40, p. 13888-13893 How to cite?
Journal: Chemistry - a European journal 
Abstract: Luminescent metal complexes having open coordination sites hold promise in the design of sensory materials and photocatalysts. As a prototype example, [Au<inf>2</inf>(dcpm)<inf>2</inf>)]2+ (dcpm = bis(dicyclohexylphosphanyl) is known for its intriguing environmental sensitive photoluminescence. By integrating a range of complementary ultrafast time-resolved spectroscopy to interrogate the excited state dynamics, this study uncovers that the events occurring in extremely rapid timescales and which are modulated strongly by environmental conditions play a pivotal role in the luminescence behavior and photochemical outcomes. Formed independent of the phase and solvent property within 0.15 ps, the metal-metal bonded 35dσ6pσ state is highly reactive possessing strong propensity toward increasing coordination number at AuI center, and with 510 ps lifetime in dichloromethane is able to mediate light induced C-X bond cleavage.
URI: http://hdl.handle.net/10397/43432
ISSN: 0947-6539
EISSN: 1521-3765
DOI: 10.1002/chem.201503045
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