Induced Near-Infrared Emission and Controlled Photooxidation based on Sulfonated Crown Ether in Water |
| |
Authors: | Xiaoyun Dong Cong Zhang Xianyin Dai Qi Wang Dr Ying-Ming Zhang Prof?Dr Xiufang Xu Prof?Dr Yu Liu |
| |
Institution: | College of Chemistry State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071 P. R. China |
| |
Abstract: | Regulation of physio-chemical properties and reaction activities via noncovalent methodology has become one of increasingly significant topics in supramolecular chemistry and showed inventive applications in miscellaneous fields. Herein, we demonstrate that sulfonated crown ether can form very stable host-guest complexes with a series of push-pull-type photosensitizers, eventually leading to the dramatic fluorescence enhancement in visible and near-infrared regions. Meanwhile, severe suppression in singlet oxygen (1O2) production is found, mainly due to the higher energy barriers between the excited single and triple states upon host-guest complexation. Moreover, such complexation-induced tuneable 1O2 generation systems has been utilized in adjusting the photochemical oxidation reactions of polycyclic aromatic hydrocarbons (anthracene) and sulfides ((methylthio)benzene) in water. This supramolecularly controlled photooxidation based on the selective molecular binding of crown ether with photosensitizers may provide a feasible and applicable strategy for monitoring and modulating many photocatalysis processes in aqueous phase. |
| |
Keywords: | host-guest chemistry photooxidation reaction singlet oxygen water-soluble crown ether |
|
|