title: Colorimetric and fluorometric discrimination of geometrical isomers (maleic acid vs fumaric acid) with real-time detection of maleic acid in solution and food additives.
abstract: Heterobis imine Schiff base probe L is able to discriminate geometrical isomers (maleic acid vs fumaric acid) through sharp colorimetric as well as fluorogenic responses even conspicuous with the naked eye. Colorimetric as well as fluorogenic sensing of maleic acid among various carboxylic acids was also demonstrated in ethanol-buffer medium. Sensing behavior of L was corroborated by (1)H NMR spectra, mass spectrometry, and theoretical calculations. Subsequently sensing behavior of L was used to probe maleic acid in starch rich food samples.
authors.affiliation: Department of Chemistry, Indian Institute of Technology Guwahati , Guwahati 781039, India.
authors.forename: Soham
authors.initials: S
authors.lastname: Samanta
authors.affiliation: Department of Chemistry, Indian Institute of Technology Guwahati , Guwahati 781039, India.
authors.forename: Chirantan
authors.initials: C
authors.lastname: Kar
authors.affiliation: Department of Chemistry, Indian Institute of Technology Guwahati , Guwahati 781039, India.
authors.forename: Gopal
authors.initials: G
authors.lastname: Das
mesh_terms: D003124:Colorimetry; D005456:Fluorescent Dyes / Q000737:chemistry; D005470:Fluorometry; D005503:Food Additives / Q000737:chemistry*; D005650:Fumarates / Q000032:analysis* / Q000737:chemistry*; D007097:Imines / Q000737:chemistry; D007536:Isomerism; D008298:Maleates / Q000032:analysis* / Q000737:chemistry*; D015394:Molecular Structure; D012545:Schiff Bases / Q000737:chemistry; D012996:Solutions; D013997:Time Factors
chemical_list: D005456:Fluorescent Dyes; D005503:Food Additives; D005650:Fumarates; D007097:Imines; D008298:Maleates; D012545:Schiff Bases; D012996:Solutions; C032005:fumaric acid; C030272:maleic acid