Effective Strategy for Colorimetric and Fluorescence Sensing of Phosgene Based on Small Organic Dyes and Nanofiber Platforms

Ying Hu, Liyan Chen, Hyeseung Jung, Yiying Zeng, Songyi Lee, Kunemadihalli Mathada Kotraiah Swamy, Xin Zhou, Myung Hwa Kim, Juyoung Yoon

Research output: Contribution to journalArticlepeer-review

99 Scopus citations

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.

Original languageEnglish
Pages (from-to)22246-22252
Number of pages7
JournalACS Applied Materials and Interfaces
Volume8
Issue number34
DOIs
StatePublished - 31 Aug 2016

Keywords

  • colorimetric sensor
  • fluorescent chemosensor
  • nanofiber
  • phosgene sensor
  • toxic gas sensor

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