Switchable Fluorescence of a Mechanical Stimulus-Responsive Au-P-S Complex
Jieqiong Huang,
Yuanyuan Hu,
Wendi Xu,
Wei Yang,
Chengrong Lu,
David James Young,
Zhi-Gang Ren
Affiliations
Jieqiong Huang
Faculty of Environmental Engineering, Suzhou Polytechnic Institute of Agriculture, Suzhou 215008, China
Yuanyuan Hu
Suzhou Key Laboratory of Novel Semiconductor-Optoelectronics Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
Wendi Xu
Suzhou Key Laboratory of Novel Semiconductor-Optoelectronics Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
Wei Yang
Faculty of Food Science and Technology, Suzhou Polytechnic Institute of Agriculture, Suzhou 215008, China
Chengrong Lu
Suzhou Key Laboratory of Novel Semiconductor-Optoelectronics Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
David James Young
James Watt School of Engineering, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK
Zhi-Gang Ren
Suzhou Key Laboratory of Novel Semiconductor-Optoelectronics Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
The reaction of [(3-bdppmapy)(AuCl)2] with NaHmna (3-bdppmapy = N,N’-bis-(diphenylphosphanylmethyl-3-aminopytidine, H2mna = 2-mercaptonicotinic acid)) resulted in a tetranuclear Au-P-S complex [(3-bdppmapy)2(AuHmna)2(AuCl)2] (1) which emitted bright yellow fluorescence at 542 nm under 377 nm excitation (QY = 5.3%, τ = 0.83 ns). Upon grinding, the emission intensity of 1 significantly and rapidly decreased, but could be recovered by exposure to CH2Cl2 vapor. This switchable fluorescence is attributed to the breaking and reforming of intermolecular hydrogen bonds with concomitant collapse and the restoration of the crystalline phase, which is not caused by static pressure or increased temperature.
