title: Three colorimetric and off-on fluorescent chemosensors for Fe3+ in aqueous media.
abstract: Three Rhodamine B derivatives were synthesized and characterized by ESI-MS, NMR, HR-MS and IR. The probes exhibit high selectivity and sensitivity towards Fe(3+) over other metal ions in CH3CN-water. Upon the addition of Fe(3+), the spirocyclic ring of the probe was opened and a significant enhancement of visible color and fluorescence within the range of 540-700 nm was observed. The colorimetric and fluorescent response to Fe(3+) can be conveniently detected even by the naked eye, which provides a facile method for the visual detection of Fe(3+). Job's plot, fluorescence titration and MS indicated the formation of 1:2 complexes between the probes and Fe(3+). The reversibility of the reaction establishes the potential of these probes as chemosensors for Fe(3+) detection.
authors: Phosphorus Chemical Engineering Research Center of Henan Province, Department of Chemistry, Zhengzhou University, Zhengzhou, China.
authors: Meimei
authors: M
authors: Chai
authors: Man
authors: M
authors: Li
authors: Di
authors: D
authors: Zhang
authors: Cui-cui
authors: CC
authors: Wang
authors: Yong
authors: Y
authors: Ye
authors: Yufen
authors: Y
authors: Zhao
mesh_terms: D003124:Colorimetry; D005290:Ferric Compounds / Q000032:analysis*; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D008163:Luminescent Measurements; D015394:Molecular Structure; D012235:Rhodamines / Q000138:chemical synthesis / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D005290:Ferric Compounds; D005456:Fluorescent Dyes; D012235:Rhodamines; D014867:Water; C029773:rhodamine B
keywords: Fe3+; Rhodamine B; chemosensors; fluorescent probes; on-off