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Zn²⁺ detection of a benzimidazole 8-aminoquinoline fluorescent sensor by inhibited tautomerization.

ABSTRACT: A new fluorescent chemosensor based on 8-aminoquinoline L1 bearing a benzimidazole moiety was synthesized, which exists as two predominant tautomers L1A and L1B in diluted DMSO-d₆ solution. Among various metal ions, L1 showed a highly selective and sensitive turn-on fluorescence response to the presence of Zn²⁺ ions in methanol. The detection limit for Zn²⁺ by L1 was calculated to be 1.76 × 10^-7 M. The 1 : 1 complexation ratio of the L1-Zn complex was confirmed through Job plot measurements. Complexation studies were performed by FT-IR, NMR and HR-ESI MS measurements and DFT calculations. With the gained insight, it was possible to successfully apply L1 in water sample analysis.

SUBMITTER: Tas H

PROVIDER: S-EPMC9043439 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature

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Zn2+ detection of a benzimidazole 8-aminoquinoline fluorescent sensor by inhibited tautomerization.

Taş Harun H Adams Jörg J Namyslo Jan C JC Schmidt Andreas A

RSC advances 20211111 58

A new fluorescent chemosensor based on 8-aminoquinoline L1 bearing a benzimidazole moiety was synthesized, which exists as two predominant tautomers L1A and L1B in diluted DMSO-d6 solution. Among various metal ions, L1 showed a highly selective and sensitive turn-on fluorescence response to the presence of Zn2+ ions in methanol. The detection limit for Zn2+ by L1 was calculated to be 1.76 × 10-7 M. The 1 : 1 complexation ratio of the L1-Zn complex was ...[more]

PMID: 35494348

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