Symmetrical Azine Colorimetric and Fluorometric Turn-Off Chemosensor for Formaldehyde Detection

Hidayah, Nurul and Purwono, Bambang and Pranowo, Harno Dwi (2019) Symmetrical Azine Colorimetric and Fluorometric Turn-Off Chemosensor for Formaldehyde Detection. [Artikel Dosen]

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Abstract

Azine derivative 6,6’-((1E,1’E)-hydrazine-1,2-diylidenebis(methanyly-lidene))bis(3,4-dimethoxy-aniline) CHA has been
synthesized by condensation of 6-nitroveratraldehyde with malononitrile followed by reduction using 10% Pd/C and
hydrazine hydrate. In the presence of formaldehyde, CHA chemosensor in ethanol showed a yellow-to-red color change
observable by the naked eyes and ‘turn off’ type fluorescence quenching in ethanol. This phenomenon was confirmed by
UV-Vis, fluorescence and 1H NMR spectroscopy. The CHA spectra in ethanol was shifted from 412 to 509 nm after addition
of formaldehyde. Fluorescence intensity of CHA gradually decreased with the increase of formaldehyde concentrations.
Furthermore, paper strips loaded-CHA were fabricated and served to detect formaldehyde qualitatively. The detection
limit of the CHA probe to formaldehyde is 0.2 M.

Item Type:	Artikel Dosen
Subjects:	Q Science > QD Chemistry T Technology > T Technology (General)
Divisi / Prodi:	Faculty of Industrial Technology (Fakultas Teknologi Industri) > S1-Food Technology (S1-Teknologi Pangan)
Depositing User:	Nurul Hidayah
Date Deposited:	17 Sep 2022 05:10
Last Modified:	17 Sep 2022 05:10
URI:	http://eprints.uad.ac.id/id/eprint/36954

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