title: Virtues and limitations of Pittsburgh green for ozone detection.
abstract: A recently proposed 2',7'-dichlorofluorescein (DCF)-derived fluorescent probe for the detection of ozone shows good selectivity against a number of reactive oxygen species and good pH stability for biological and environmental applications. It is found, however, that over oxidation of the fluorescent product (Pittsburgh green) can occur. This could render quantitative measurements inaccurate due to a reduction in fluorescence and overlapping fluorescence signals from over oxidation by-products and it requires careful experimental design. Although difficult to assess by fluorescence measurements, the over oxidation can be conveniently monitored by (1)H NMR spectroscopy.
authors.affiliation: Department of Chemistry, School of Science, Loughborough University, Leicestershire, LE11 3TU, UK. b.r.buckley@lboro.ac.uk.
authors.forename: Carlos
authors.initials: C
authors.lastname: Castelló Beltrán
authors.forename: Elliott A
authors.initials: EA
authors.lastname: Palmer
authors.forename: Benjamin R
authors.initials: BR
authors.lastname: Buckley
authors.forename: Felipe
authors.initials: F
authors.lastname: Iza
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000592:standards*; D004355:Drug Stability; D005456:Fluorescent Dyes / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D015394:Molecular Structure; D010126:Ozone / Q000032:analysis*
chemical_list: D005456:Fluorescent Dyes; D010126:Ozone