A luminescence molecular switch via modulation of PET and ICT processes in DCM system |
| |
| Authors: | Jinfeng Yang Meng Li Lihua Kang Weihong Zhu |
| |
| Institution: | 1.Shanghai Key Laboratory of Functional Materials Chemistry; Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai,China;2.Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan; College of Chemistry and Chemical Engineering,Shihezi University,Shihezi,China;3.School of Environmental Science and Engineering,North China Electric Power University,Baoding,China |
| |
| Abstract: | A novel versatile dicyanomethylene-4H-pyran (DCM) based derivative bearing ferrocenyl group (DCM-N-Fc) is designed as modulator to construct “off-on” logic operation. The optical properties of DCM-N-Fc are characterized by absorption and steady-state fluorescence technique, showing that the fluorescence from DCM chromophore via intramolecular charge transfer (ICT) is strongly quenched by photoinduced electron transfer (PET) process from ferrocene moiety. In contrast with the references (DCM-N and DCM-Fc), the fluorescence of DCM-N-Fc can be triggered by oxidizing ferrocenyl unit either chemically or electrochemically, exhibiting a characteristic emission modulation at around 610 nm with an electrofluorochromic behavior. Furthermore, the free energy and the fluorescence lifetime in the PET path verify the thermodynamic feasibility. Cyclic voltammetry, absorption spectroscopy, time-resolved fluorescence as well as DFT calculation have been used to elaborate the manipulation via both PET and ICT processes. |
| |
| Keywords: | |
| 本文献已被 CNKI SpringerLink 等数据库收录！ |
|
