title: Effective Strategy for Colorimetric and Fluorescence Sensing of Phosgene Based on Small Organic Dyes and Nanofiber Platforms.
abstract: Three o-phenylendiamine (OPD) derivatives, containing 4-chloro-7-nitrobenzo[c][1,2,5]oxadiazole (NBD-OPD), rhodamine (RB-OPD), and 1,8-naphthalimide (NAP-OPD) moieties, were prepared and tested as phosgene chemosensors. Unlike previously described methods to sense this toxic agent, which rely on chemical processes that transform alcohols and amines to respective phosphate esters and phosphoramides, the new sensors operate through a benzimidazolone-forming reaction between their OPD groups and phosgene. These processes promote either naked eye visible color changes and/or fluorescence intensity enhancements in conjunction with detection limits that range from 0.7 to 2.8 ppb. NBD-OPD and RB-OPD-embedded polymer fibers, prepared using the electrospinning technique, display distinct color and fluorescence changes upon exposure to phosgene even in the solid state.
authors: Department of Chemistry and Nano Science, Ewha Womans University , Seoul 120-750, Korea.
authors: Ying
authors: Y
authors: Hu
authors: Department of Chemistry and Nano Science, Ewha Womans University , Seoul 120-750, Korea.
authors: Liyan
authors: L
authors: Chen
authors: Department of Chemistry and Nano Science, Ewha Womans University , Seoul 120-750, Korea.
authors: Hyeseung
authors: H
authors: Jung
authors: Key Laboratory of Natural Resources of Changbai Mountain & Functional Molecules, Ministry of Education, Yanbian University , Yanji 133-002, China.
authors: Yiying
authors: Y
authors: Zeng
authors: Department of Chemistry and Nano Science, Ewha Womans University , Seoul 120-750, Korea.
authors: Songyi
authors: S
authors: Lee
authors: Department of Chemistry and Nano Science, Ewha Womans University , Seoul 120-750, Korea.|Department of Pharmaceutical Chemistry, V. L. College of Pharmacy , Raichur 584103, India.
authors: Kunemadihalli Mathada Kotraiah
authors: KM
authors: Swamy
authors: Key Laboratory of Natural Resources of Changbai Mountain & Functional Molecules, Ministry of Education, Yanbian University , Yanji 133-002, China.
authors: Xin
authors: X
authors: Zhou
authors: Department of Chemistry and Nano Science, Ewha Womans University , Seoul 120-750, Korea.
authors: Myung Hwa
authors: MH
authors: Kim
authors: Department of Chemistry and Nano Science, Ewha Womans University , Seoul 120-750, Korea.
authors: Juyoung
authors: J
authors: Yoon
keywords: colorimetric sensor; fluorescent chemosensor; nanofiber; phosgene sensor; toxic gas sensor