Reported herein is a fluorometric and colorimetric sensor for the presence of trace amounts of water in organic solvents, using -bimane based boronate ester . This sensor responds to the presence of water with a highly sensitive turn-off fluorescence response, with detection limits as low as 0.018% water (v/v). Moreover, analogously high performance was observed when compound was adsorbed on filter paper, with the paper-based sensor responding both to the presence of liquid water and to humid atmospheres. Reusability of the paper-based sensor up to 11 cycles was demonstrated, albeit with progressive decreases in the performance, and H NMR and mass spectrometry analyses were used to explain the observed, hydrolysis-based sensor response.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8802138PMC
http://dx.doi.org/10.3389/fchem.2021.782481DOI Listing

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