Design of fluorescence turn-on sensors with novel response mechanism based on C N isomerization

Zhong, Kailiang; Liu, Hailing; Jin, Shu; Chen, Xingliang

doi:10.1016/j.dyepig.2021.109714

Cited by 10 publications

(5 citation statements)

References 44 publications

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“…Currently, the C=N isomerization process, a nonradiative decay path of the excited state, is widely used to design a turn-on fluorescent probe [ 41 , 42 , 43 ]. In order to elucidate whether the weak fluorescence of QP is derived from the C=N isomerization process, the potential energy curves of QP as a function of the dihedral angle C-N=C-C fixed at values in the range from −178° to −88° were constructed both in S 0 and S 1 states.…”

Section: Resultsmentioning

confidence: 99%

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

Ding

Xia

Lin

et al. 2022

Sensors

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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–.

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Section: Resultsmentioning

confidence: 99%

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

Ding

Xia

Lin

et al. 2022

Sensors

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“…The hydrazone group consists of a C=N donor system which quenched the fluorophore's fluorescence by C=N isomerization and PET process. [195][196][197][198] The basic principle of 'turn on' is used in free fluoro-ionophore, including PET and ICT isomerization.…”

Section: Magnesium Ions (Mg 2 + )mentioning

confidence: 99%

Coumarin‐based Chemosensors for Metal Ions Detection

et al. 2022

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Coumarins, due to their intense and persistent emission of fluorescence, structural flexibility, and excellent biocompatibility, have become a popular choice in developing new fluorescent chemosensors. Coumarins have long been used for sensing anions, cations, chemically reactive nitrogen, oxygen, sulfur-containing species, and small molecules. They have also been shown to have applicability in imaging, biology, and medical research. Due to the widespread use and excellent biological activity, hundreds of such coumarin motifs have either been isolated from nature or synthesized in a laboratory. This review covers all the developments pertaining to the synthesis and use of coumarin for sensing a variety of metal ions (alkali, alkaline earth, transition, heavy, and noble metal ions). This comprehensive review includes an overview of the coumarin-based chemosensor's pH limit, detection limit, and binding mode. A brief explanation of the stoichiometric ratio between metal and chemosensor moiety and the applicability of each chemosensor is also given.

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“…37 Moreover, a pyrene-appended moiety has been fabricated for Zn 2+ , which was further utilized in the measurement of zinc concentration from the contained drug. 38 Further, Zhang et al developed a sensor based on the rational control of C]N bond isomerization for the highly sensitive detection of Zn 2+ and NO 2 − in an aqueous solution. 39 The C]N bond isomerization-based sensing mechanisms can be compatible with various other detection methods, including spectroscopy, electrochemistry, and uorescence, enabling versatile sensing platforms.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Advancements in the development of fluorescent chemosensors based on CN bond isomerization/modulation mechanistic approaches

Tamrakar,

Wani,

Mishra

et al. 2024

Anal. Methods

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Design of fluorescence turn-on sensors with novel response mechanism based on C N isomerization

Cited by 10 publications

References 44 publications

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

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

Coumarin‐based Chemosensors for Metal Ions Detection

Advancements in the development of fluorescent chemosensors based on CN bond isomerization/modulation mechanistic approaches

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