title: In vitro sensing of Cu(+) through a green fluorescence rise of pyranine.
abstract: Pyranine as a new class of fluorescent chemosensor for the Cu(+) ion is reported. The probe is capable of discriminating ranges of cations from the Cu(+) ion, even in competing environment. The dye displayed a rapid fluorescence response (t1/2 = 1.66 min) towards the Cu(+) ion, and the micromolar detection limit enabled the detection of the ion in environmental samples. The observed stoichiometry of complexation between pyranine and Cu(+) was 2 : 1. Interestingly, the sensing characteristic was specific to only neutral pH. A metal-to-ligand charge-transfer (MLCT)-based mechanism of sensing was proposed based on electron spin resonance (EPR), Raman spectroscopic and cyclic voltammetric studies.
authors: Department of Chemistry, Indian Institute of Science Education and Research, Pune, India. ptalukdar@iiserpune.ac.in.
authors: Tanmoy
authors: T
authors: Saha
authors: Abhigyan
authors: A
authors: Sengupta
authors: Partha
authors: P
authors: Hazra
authors: Pinaki
authors: P
authors: Talukdar
mesh_terms: D001190:Arylsulfonates / Q000737:chemistry*; D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D003116:Color; D003300:Copper / Q000032:analysis*; D005456:Fluorescent Dyes / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D012995:Solubility; D013050:Spectrometry, Fluorescence; D014867:Water / Q000737:chemistry
chemical_list: D001190:Arylsulfonates; D005456:Fluorescent Dyes; D014867:Water; D003300:Copper; C005047:pyranine