Abstract
The twisted intramolecular charge transfer (TICT) and excited state intramolecular proton transfer of H2L has been explored based by density functional theory and time-dependent density functional theory methods. The results show that there are mainly two conformers of H2L-A and H2L-B. The presence of TICT state induced by photo-induced electron transfer process is related to fluorescence quenching behavior in the sensor. The sensor H2L detects and discriminates Al3+ and Zn2+ successfully by regulating solvents (from protic to aprotic) via a turn-on fluorescence signaling. The above conclusions were also verified by FMOs and electron spectra.
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Liu, XM., Ma, DX. & Ju, XH. Solvent-regulated fluorimetric differentiation of Al3+ and Zn2+ using a dual functional sensor based on the photo-induced electron transfer and intramolecular proton transfer mechanism. MRS Communications 13, 634–640 (2023). https://doi.org/10.1557/s43579-023-00404-8
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DOI: https://doi.org/10.1557/s43579-023-00404-8