Deciphering Photoluminescence Dynamics and Reactivity of the Luminescent Metal-Metal-Bonded Excited State of a Binuclear Gold(I) Phosphine Complex Containing Open Coordination Sites.
Chemistry
; 21(40): 13888-93, 2015 Sep 28.
Article
in En
| MEDLINE
| ID: mdl-26376326
ABSTRACT
Luminescent metal complexes having open coordination sites hold promise in the design of sensory materials and photocatalysts. As a prototype example, [Au2 (dcpm)2)](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 â¼0.15â
ps, the metal-metal bonded (3)5dσ*6pσ state is highly reactive possessing strong propensity toward increasing coordination number at Au(I) center, and with â¼510â
ps lifetime in dichloromethane is able to mediate light induced C-X bond cleavage.
Full text:
1
Database:
MEDLINE
Language:
En
Year:
2015
Type:
Article