Related Experiment Video
Updated: Mar 30, 2026

Qualitative Identification of Carboxylic Acids, Boronic Acids, and Amines Using Cruciform Fluorophores
Published on: August 19, 2013
Tri-color emission and colorimetric recognition of acetate using semicarbazide and thio-semicarbazide derivatives:
Sisir Lohar1, Sougata Sinha2, Subrata Ghosh2
1Department of Chemistry, The University of Burdwan, Burdwan, West Bengal, India.
Abstract:
Two new fluorescence probes having semicarbazide (DSC) and thio-semicarbazide (DTSC) units have been derived upon reaction with 2-hydroxy-5-methylbenzene-1,3-dialdehyde. Both the probes show excellent selectivity for acetate ion in DMSO medium whereby DTSC generates tricolor emission. The association constants of DSC and DTSC for acetate are 6.6×10(4)M(-1) and 2×10(3)M(-1) respectively with corresponding detection limits, 1.06×10(-7)M and 2.5×10(-6)M. Density functional theoretical (DFT) studies nicely demonstrate the interaction between the DTSC and acetate ion.
Related Concept Videos
IR and UV–Vis Spectroscopy of Carboxylic Acids
However, the stretching absorptions for the C=O bond vary depending on the structure of carboxylic acids. The C=O bond of the free carboxylic acids shows a higher stretching frequency, 1760 cm−1, while H-bonded carboxylic acids (dimers) exhibit stretching absorptions at a lower frequency,...
Acetals and Thioacetals as Protecting Groups for Aldehydes and Ketones
In the presence of multiple functional groups, when selective reduction of one group over the other is desired, groups like aldehydes and ketones that form acetals...
Aryldiazonium Salts to Azo Dyes: Diazo Coupling
Spectroscopy of Carboxylic Acid Derivatives
Oxidations of Aldehydes and Ketones to Carboxylic Acids
Aldehydes readily undergo oxidation in strong oxidizing agents such as potassium permanganate and chromic acid. The oxidation can also be carried out using mild oxidizing agents such as silver oxide. In fact, aldehydes can be easily oxidized...
IR and UV–Vis Spectroscopy of Aldehydes and Ketones

