Receptor-free phenothiazine derivative as fluorescent probe for picric acid: Investigation of the inner filter effect channel.
Spectrochim Acta A Mol Biomol Spectrosc
; 303: 123166, 2023 Dec 15.
Article
em En
| MEDLINE
| ID: mdl-37481841
ABSTRACT
In this study, a highly fluorescent and receptor-free phenothiazine derivative (PDAB) was developed to detect picric acid. A combination of steady-state and time-resolved fluorescence studies was conducted to examine the excited state behavior of PDAB with picric acid in solution. The PDAB probe displayed a significant degree of selectivity and was highly sensitive to picric acid, with an extremely low detection limit of 9.82 nM. Time-resolved fluorescence quenching studies exhibit direct evidence of an inner filter effect-based sensing mechanism. Using the Parker equation, a thorough analysis was done to correct the inner filter effect on the sensing of picric acid. Overall, these studies provide critical information on the sensing mechanism for picric acid detection.
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MEDLINE
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En
Ano de publicação:
2023
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Article