title: Novel colorimetric anion sensors based on N-acetylglyoxylic amides containing nitrophenyl signalling units.
abstract: N-acetylglyoxylic amides 4 and 5 bearing pendant 4-nitrophenyl and 2,4-dinitrophenyl groups respectively were synthesized and evaluated as anion sensors. A crystal structure of 4 was obtained by X-ray crystallography. Compounds 4 and 5 behaved as colorimetric sensors for CN(-) and F(-), and exhibited naked eye-detectable color changes upon the addition of these anions. The chromogenic properties of 4 and 5 were assessed by UV-Vis and (1)H NMR spectroscopy.
authors.affiliation: School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia; Department of Chemistry, The University of Sebelas Maret, Surakarta, Jawa Tengah 57126, Indonesia.
authors.forename: Venty
authors.initials: V
authors.lastname: Suryanti
authors.affiliation: Mark Wainwright Analytical Centre, The University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: Mohan
authors.initials: M
authors.lastname: Bhadbhade
authors.affiliation: Department of Chemistry, Indian Institute of Technology, New Delhi 110016, India.
authors.forename: Har Mohindra
authors.initials: HM
authors.lastname: Chawla
authors.affiliation: School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: Ethan
authors.initials: E
authors.lastname: Howe
authors.affiliation: School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: Pall
authors.initials: P
authors.lastname: Thordarson
authors.affiliation: School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: David StC
authors.initials: DS
authors.lastname: Black
authors.affiliation: School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia. Electronic address: n.kumar@unsw.edu.au.
authors.forename: Naresh
authors.initials: N
authors.lastname: Kumar
mesh_terms: D000577:Amides / Q000737:chemistry*; D000838:Anions / Q000032:analysis*; D003124:Colorimetry / Q000379:methods*; D018360:Crystallography, X-Ray; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D009596:Nitrophenols / Q000737:chemistry*; D011522:Protons; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000577:Amides; D000838:Anions; D009596:Nitrophenols; D011522:Protons
keywords: Anion receptors; Colorimetric sensors; Deprotonation; Glyoxylamides; Hydrogen bonding