Published April 1, 2016 | Version v1
Journal article Open

An interesting spectroscopic method for chromofluorogenic detection of cyanide ion in aqueous solution: Disruption of intramolecular charge transfer (ICT)

Authors/Creators

  • 1. Department of Chemistry, Faculty of Physice & Chemistry, Alzahra University, Vanak, Tehran, Iran, Nanoscience & Nanotechnology Research Center (NNRC)
  • 2. Department of Organic Chemistry
  • 3. Department of Analytical Chemistry, Faculty of Chemistry, Razi University, Kermanshah 67149, Iran

Description

5-[4-(dimethylamino)benzylidene) pyrimidine-2,4,6(1H,3H,5H)]-trione (DMP-3H), the receptor
was synthesized which played a chemosensor role for cyanide ion (CN−) in aqueous solution with colorimetric
and fluorescence turn-off responses. Upon addition of CN− ion into the solution containing the receptor, a
color change visible to the naked eye was observed from yellow to colourless and also, the fluorescence of the
solution was immediately quenched. Moreover, DMP-3H exhibited a selective response to cyanide ion over
many other anions such as F−, Cl−, Br−, I−, SO2−3, OCN−, ClO−3, CO2−3, IO−3, N−3, C2O2−4 and SCN−. The
detection limit toward CN− was 8.1 × 10−7 mol.L−1, which is satisfactory enough for monitoring CN− levels
in physiological and environmental systems.

Notes

A reaction-based disruption in intramolecular charge transfer of a receptor (DMP-3H) leads to the design and synthesis of a simple and cost-effective CN− sensor via a clean chemical pathway. The designed sensor can detect CN− ions in an aqueous solution at room temperature.

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