title: Optical sensing of hydrogen sulphate using rhodamine 6G hydrazide from aqueous medium.
abstract: This communication reports the application of rhodamine 6G hydrazide (L) for the selective colorimetric and turn-on fluorescent sensing of hydrogen sulphate ions from aqueous medium. The ring opening of the colourless spirocyclic form of L was selectively triggered in the presence of HSO4-among the other tested anions (F-, Cl-, Br-, I-, AcO-, H2PO4-, NO3-, ClO4-, CN-, HO-, AsO33-and SO42-), which gives rise to a pink colour and strong fluorescence in the visible region. Sensor L showed a detection limit down to micromolar range without any interference from the other tested competitive anions. Sensor L was applied for the construction of two inputs (HO-and HSO4-) INHIBIT type molecular logic gate and naked-eye detection of HSO4-using test paper strips.
authors.affiliation: Department of Applied Chemistry, S.V. National Institute of Technology (SVNIT), Surat 395007, India.
authors.forename: Yachana
authors.initials: Y
authors.lastname: Upadhyay
authors.affiliation: Department of Applied Chemistry, S.V. National Institute of Technology (SVNIT), Surat 395007, India.
authors.forename: Shilpa
authors.initials: S
authors.lastname: Bothra
authors.affiliation: Department of Applied Chemistry, S.V. National Institute of Technology (SVNIT), Surat 395007, India.
authors.forename: Rajender
authors.initials: R
authors.lastname: Kumar
authors.affiliation: Department of Applied Chemistry, Kyungpook National University, Daegu, 41566, South Korea.
authors.forename: Heung-Jin
authors.initials: HJ
authors.lastname: Choi
authors.affiliation: Department of Applied Chemistry, S.V. National Institute of Technology (SVNIT), Surat 395007, India. Electronic address: suban_sahoo@rediffmail.com.
authors.forename: Suban K
authors.initials: SK
authors.lastname: Sahoo
keywords: Colorimetric; Hydrogen sulphate sensor; Logic gate; Rhodamine 6G hydrazide; Turn-on fluorescence