title: Rhodamine-derived Schiff base for the selective determination of mercuric ions in water media.
abstract: A new rhodamine-derived Schiff base (RS) was synthesized and its sensing property to metal ions was investigated by UV/vis and fluorescence spectroscopies. Addition of Hg2+ ions to the aqueous solution of RS gave a visual color change as well as significantly fluorescent enhancement, while other ions including Pb2+, Cd2+, Cr3+, Zn2+, Cu2+, Fe2+, Co3+, Ni2+, Ca2+, Mg2+, K+ and Na+ ions did not induce any distinct color/spectral changes, which constituted a Hg2+-selective fluorescent OFF-ON chemosensor. The Hg2+-induced ring-opening of spirolactam of rhodamine in RS resulted in the dual chromo- and fluorogenic observation.
authors.affiliation: Department of Chemistry, Hue University, Hue 8454, Viet Nam. duongtuanquang@dhsphue.edu.vn
authors.forename: Duong Tuan
authors.initials: DT
authors.lastname: Quang
authors.forename: Jia-Sheng
authors.initials: JS
authors.lastname: Wu
authors.forename: Nguyen Dinh
authors.initials: ND
authors.lastname: Luyen
authors.forename: Tran
authors.initials: T
authors.lastname: Duong
authors.forename: Nguyen Dang
authors.initials: ND
authors.lastname: Dan
authors.forename: Nguyen Chi
authors.initials: NC
authors.lastname: Bao
authors.forename: Phan Tu
authors.initials: PT
authors.lastname: Quy
mesh_terms: D006863:Hydrogen-Ion Concentration; D007477:Ions; D008628:Mercury / Q000032:analysis*; D012235:Rhodamines / Q000737:chemistry*; D012545:Schiff Bases / Q000737:chemistry*; D012996:Solutions; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D017186:Titrimetry; D014867:Water / Q000737:chemistry*
chemical_list: D007477:Ions; D012235:Rhodamines; D012545:Schiff Bases; D012996:Solutions; D014867:Water; D008628:Mercury