title: A fluorescent dipyrrinone oxime for the detection of pesticides and other organophosphates.
abstract: An N,N-carbonyl-bridged dipyrrinone oxime has been synthesized and studied as a potential sensor for organophosphates. The molecular sensor underwent a drastic colorimetric response upon formation of the adduct. The pesticide dimethoate was found to produce the biggest spectral response, with a limit of detection equal to 4.0 ppm using UV-visible spectroscopy. Minimal fluorescence "turn on" via a PET mechanism was seen, and molecular modeling studies were used to explain the lower than expected PET response. The X-ray crystal structure of the fluorescent dipyrrinone oxime was also obtained.
authors.affiliation: Department of Chemistry, University of West Florida, 11000 University Parkway, Pensacola, Florida 32514, USA.
authors.forename: Ian
authors.initials: I
authors.lastname: Walton
authors.forename: Marauo
authors.initials: M
authors.lastname: Davis
authors.forename: Lyndsay
authors.initials: L
authors.lastname: Munro
authors.forename: Vincent J
authors.initials: VJ
authors.lastname: Catalano
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Cragg
authors.forename: Michael T
authors.initials: MT
authors.lastname: Huggins
authors.forename: Karl J
authors.initials: KJ
authors.lastname: Wallace
mesh_terms: D004396:Coloring Agents; D005456:Fluorescent Dyes / Q000138:chemical synthesis* / Q000737:chemistry; D008958:Models, Molecular; D015394:Molecular Structure; D010755:Organophosphates / Q000032:analysis / Q000737:chemistry*; D010091:Oximes / Q000138:chemical synthesis* / Q000737:chemistry; D010575:Pesticides / Q000032:analysis / Q000737:chemistry*; D049268:Positron-Emission Tomography
chemical_list: D004396:Coloring Agents; D005456:Fluorescent Dyes; D010755:Organophosphates; D010091:Oximes; D010575:Pesticides