A Near-infrared Benzothiazole-based Chemodosimeter for Rapid and Selective Detection of Hydrogen Sulfide

Abstract

Hydrogen sulfide (H2S) is a biologically relevant gaseous molecule, which involves in a wide variety of physiological and pathological processes. Thus, detection of H2S is highly valuable in order to clarify its complex roles. In this study, a new benzothiazole-based donor-acceptor type H2S selective chemodosimeter (HP-1) was synthesized and its H2S detection capabilities were investigated in aqueous solutions. HP-1 exhibited a red-shifted absorption signal at 530 nm and a near-infrared (NIR) fluorescence peak at 680 nm as a result of enhanced intramolecular charge transfer (ICT) in the presence of H2S, which enabled a selective and very rapid ratiometric fluorescent detection. HP-1 was also showed to be highly sensitive toward H2S with a very low limit of detection value.

Keywords

• Fluorescence
• hydrogen sulfide
• benzothiazole
• near-infrared imaging
• chemodosimeters

Thanks

S. Kolemen thanks Koç University for the financial support. The author also acknowledges the researchers in Koç University Surface Science and Technology Center (KUYTAM) for fluorescence quantum yield measurements.

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