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HIGHLY SENSITIVE CHITOSAN-BASED OPTICAL FLUORESCENT SENSOR FOR GASEOUS METHYLAMINE DETECTION

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Mironenko A. Y., Sergeev A. A., Nazirov A. E., Voznesenskiy S. S., Bratskaya S. Y., Mirochnik A. G.

Progress on Chemistry and Application of Chitin and its Derivatives

2017

vol. 22

159-165

An optical fluorescent sensor based on a chitosan thin film co-doped with Eu3+ and a bromothymol blue pH indicator has been developed. Near-UV to visible (350–400 nm) excitation of the europium (III) chelate complexes with 1,3-diphenyl-1,3-propanedione exhibits a typical lanthanide emission with maximum at 618 nm. Luminescent spectra of the Eu3+ complex were found to be insensitive to the presence of methylamine gas. Therefore, bromothymol blue, a non-fluorescent pH indicator with an absorbance maximum of deprotonated form close to the Eu3+ emission band was added to the film to provide a non-fluorescent reversible response to different methylamine concentrations, which can be detected by measuring the Eu3+ emission.

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1 Progress on Chemistry and Application of Chitin and its Derivatives

1 2017

1 Bratskaya S. Y.

1 Mirochnik A. G.

1 Mironenko A. Y.

1 Nazirov A. E.

1 Sergeev A. A.

1 Voznesenskiy S. S.

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HIGHLY SENSITIVE CHITOSAN-BASED OPTICAL FLUORESCENT SENSOR FOR GASEOUS METHYLAMINE DETECTION