Ratiometric fluorescent chemosensor for mercury(ii) cations in aqueous solution based on the crown-containing bis(chromophoric) 1,8-naphthalimide—styrylpyridine system

Panchenko, P.A.; Polyakova, A.S.; Ustimova, M.A.; Efremenko, A.V.; Feofanov, A.V.; Fedorov, Y.V.; Fedorova, O.A.

Авторы: Panchenko P.A., Polyakova A.S., Ustimova M.A., Efremenko A.V., Feofanov A.V., Fedorov Yu V., Fedorova O.A.
Журнал: Russian Chemical Bulletin
Том: 73
Номер: 10
Год издания: 2024
Издательство: Springer Nature
Местоположение издательства: Switzerland
Первая страница: 2921
Последняя страница: 2935
DOI: 10.1007/s11172-024-4409-1
Аннотация: The crown-containing bis(chromophoric) chemosensor for mercury(II) cations in an aqueous solution was synthesized using the azide—alkyne 1,3-dipolar cycloaddition click reaction. The synthesized compound contains the 4-methoxy-1,8-naphthalimide fragment acting as the electron excitation energy donor and styrylpyridine being the chromorphoreacceptor. Upon the excitation of the naphthalimide residue with the visible light, the resonance energy transfer (RET) occurs, and its effi ciency decreases as a result of complex formation with Hg2+ cations. The changes in the fl uorescence spectrum observed upon the addition of Hg2+ allow one to detect the ratiometric fl uorescence response due to an increase in the ratio of emission intensities in the donor and acceptor channels. Based on the spectrophotometric and spectrofl uorimetric titration data, the logarithms of the stability constants (logK) for the 1 : 1 metal—ligand complex were calculated to be 5.37±0.05 and 5.81±0.06, respectively. The proposed fl uoroionophore is characterized by the detection limit of Hg2+ ions in water at pH 4.5 equal to 40 nmol L–1. The ability of the synthesized chemosensor to perform fl uorescence imaging of mercury(II) cations in living cells was also analyzed.
Добавил в систему: Феофанов Алексей Валерьевич

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Ratiometric fluorescent chemosensor for mercury(ii) cations in aqueous solution based on the crown-containing bis(chromophoric) 1,8-naphthalimide—styrylpyridine systemстатья

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