Visual Identification of Light-Driven Breakage of the Silver-Dithiocarbamate Bond by Single Plasmonic Nanoprobes.
Insight into the nature of metal-sulfur bond, a meaningful one in life science, interface chemistry and organometallic chemistry, is interesting but challenging. By utilizing the localized surface plasmon resonance properties of silver nanoparticles, herein we visually identified the photosensitivity of silver-dithiocarbamate (Ag-DTC) bond by using dark field microscopic imaging (iDFM) technique at single nanoparticle level. It was found that the breakage of Ag-DTC bond could be accelerated effectively by light irradiation, followed by a pH-dependent horizontal or vertical degradation of the DTC molecules, in which an indispensable preoxidation process of the silver was at first disclosed. These findings suggest a visualization strategy at single plasmonic nanoparticle level which can be excellently applied to explore new stimulus-triggered reactions, and might also open a new way to understand traditional organic reaction mechanisms.
Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China.
Peng Fei
PF
Gao
College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
Bin Fang
BF
Yuan
College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
Ming Xuan
MX
Gao
Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China.
Rong Sheng
RS
Li
College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
Jun
J
Ma
Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China.
Hong Yan
HY
Zou
College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
Yuan Fang
YF
Li
College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
Ming
M
Li
Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China.|College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
Cheng Zhi
CZ
Huang