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A Theoretical Study of the Sensing Mechanism of a Schiff-Based Sensor for Fluoride.

ABSTRACT: In the current work, we studied the sensing process of the sensor (E)-2-((quinolin-8ylimino) methyl) phenol (QP) for fluoride anion (F^-) with a "turn on" fluorescent response by density functional theory (DFT) and time-dependent density functional theory (TDDFT) calculations. The proton transfer process and the twisted intramolecular charge transfer (TICT) process of QP have been explored by using potential energy curves as functions of the distance of N-H and dihedral angle C-N=C-C both in the ground and the excited states. According to the calculated results, the fluorescence quenching mechanism of QP and the fluorescent response for F^- have been fully explored. These results indicate that the current calculations completely reproduce the experimental results and provide compelling evidence for the sensing mechanism of QP for F^-.

SUBMITTER: Ding S

PROVIDER: S-EPMC9144756 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature

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A Theoretical Study of the Sensing Mechanism of a Schiff-Based Sensor for Fluoride.

Ding Sha S Xia Yong Y Lin Xiaoqi X Sun Aokui A Li Xianggang X Liu Yuejun Y

Sensors (Basel, Switzerland) 20220523 10

In the current work, we studied the sensing process of the sensor (E)-2-((quinolin-8ylimino) methyl) phenol (QP) for fluoride anion (F<sup>-</sup>) with a "turn on" fluorescent response by density functional theory (DFT) and time-dependent density functional theory (TDDFT) calculations. The proton transfer process and the twisted intramolecular charge transfer (TICT) process of QP have been explored by using potential energy curves as functions of the distance of N-H and dihedral angle C-N=C-C b ...[more]

PMID: 35632367

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