A new coumarin based chromo-fluorogenic probe for selective recognition of cyanide ions in an aqueous medium. Issue 117 (11th November 2015)

• Record Type: Journal Article
• Authors: Sun, Xueyi; Wang, Yu; Zhang, Xiaofeng; Zhang, Shihong; Zhang, Zhao
• Is Part Of: RSC advances. Volume 5:Issue 117(2015)
• Page Start: 96905
• Page End: 96910
• Publication Date: 2015-11-11
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra14500g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The optical behavior of a simple intramolecular charge transfer (ICT) fluorescent probe, a coumarin-nitrobenzene conjugate (CNB), has been described to detect cyanide (CN − ) selectively in buffered aqueous media. Abstract : The optical behavior of a simple intramolecular charge transfer (ICT) fluorescent probe, a coumarin-nitrobenzene conjugate (CNB), has been described to detect cyanide (CN − ) selectively in buffered aqueous media. The cyanide addition on the electron-deficient alkene bridge interrupts the π-conjugation in CNB, which obstructs the ICT process and results in a color change from yellow to colorless and a significant fluorescence enhancement at 410 nm. Job's plot analysis revealed a 1 : 1 stoichiometry for the interaction between the probe and cyanide anion with a detection limit of 0.14 μM. The probe was also used for fabrication of test strips that could be used in practical and efficient CN − test kits.