title: Colorimetric detection of copper ions in sub-micromolar concentrations using a triarylamine-linked resin bead.
abstract: The triarylamine derivative ETPA reacts with Cu(2+) to give deeply colored, stable radical cations in acetonitrile solution. ETPA was immobilized on to a tentagel resin bead which was then used for the fabrication of a simple device capable of the colorimetric detection of submicromolar concentrations of Cu(2+) ions in water. The naked eye detection limit reported here for Cu(2+) is one of the lowest ever reported for small molecule sensors.
authors.affiliation: Photosciences and Photonics, Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, Council of Scientific and Industrial Research, Trivandrum 695 019, India.
authors.forename: Tony George
authors.initials: TG
authors.lastname: Thomas
authors.forename: Kesavapillai
authors.initials: K
authors.lastname: Sreenath
authors.forename: Karical R
authors.initials: KR
authors.lastname: Gopidas
mesh_terms: D000097:Acetonitriles / Q000737:chemistry; D000588:Amines / Q000737:chemistry*; D003124:Colorimetry; D003300:Copper / Q000032:analysis*; D007477:Ions / Q000737:chemistry; D010795:Phthalic Acids / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D000097:Acetonitriles; D000588:Amines; D007477:Ions; D010795:Phthalic Acids; D011137:Polystyrenes; D014867:Water; C101297:Tentagel resin; C051657:endoxo-delta(4)-tetrahydrophthalic acid; D003300:Copper; C032159:acetonitrile