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All Journal IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Musyrifah, Arina
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Biochemistry, Genetics & Molecular Biology Chemistry Environmental Science

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Synthesis and Characterization of Schiff Base Compound Benzaldehyde- 2,4-Dinitrophenylhydrazone as a Carbonate Anion Sensor Musyrifah, Arina; Hidayati, Nurlisa; Yuliasari, Nova
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 3 (2025): October 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v10.i3.198

Abstract

Benzaldehyde-2,4-dinitrophenylhydrazone was synthesized via  the condensation of benzaldehyde with 2,4- dinitrophenylhydrazine. The product was analyzed using UV–Vis and FT-IR spectroscopy, and its solvatochromic properties were investigated in DMF, acetone, and ethanol. Its application as a carbonate anion sensor was evaluated under optimized conditions. Schiff base formed orange crystalline solids with a 91.86% yield. UV-Vis spectra showed maximum absorption wavelength at 260 nm (π-π*) and 390 nm (n-π*). FT-IR analysis proves the presence of azomethine band (HC=N) at 1618 cm-1 and the shift of the N-H stretching band region from 3325 to 3284 cm-1. Among the solvents studied, DMF exhibited the highest solubility and color stability, acetone showed the greatest absorbance but poor stability, and ethanol showed low solubility with the formation of a precipitate. Functioning as a carbonate anion sensor, the Schiff base exhibited a noticeable color change from yellow to red, along with a bathochromic shift from 390 nm to 495 nm (π→π*), reaching its maximum response after 30 minutes.
Co-Authors Nova Yuliasari Nurlisa Hidayati