Detection of multiple analytes (CN- and F-) based on a simple pyrazine-derived chemosensor in aqueous solution: Experimental and theoretical approaches

Jae Jun Lee, Gyeong Jin Park, Ye Won Choi, Ga Rim You, Yong Sung Kim, Sun Young Lee, Cheal Kim

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

A new colorimetric receptor 1 for the detection of CN- and F- has been simply developed. Receptor 1 showed selectively colorimetric responses to CN- in a near-perfect aqueous solution and F- in 10% aqueous solution, respectively. An obvious color change of 1 from yellow to colorless was observed for CN- through a nucleophilic addition mechanism, while F- was detected through deprotonating mechanism with a distinct color change from yellow to orange. The binding modes of receptor 1 with two analytes (CN-and F-) were proposed to be 1:1, based on Job plot, 1H NMR titration, and ESI-mass spectrometry analysis. Moreover, the sensing mechanisms for F- and CN- were theoretically supported by DFT and TD-DFT calculation.

Original languageEnglish
Pages (from-to)123-132
Number of pages10
JournalSensors and Actuators, B: Chemical
Volume207
Issue numberPart A
DOIs
StatePublished - Feb 2015

Keywords

  • Colorimetric
  • Cyanide
  • DFT calculations
  • Fluoride
  • Multiple analytes

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