These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: A novel "turn-on" fluorescent probe based on triphenylimidazole-hemicyanine dyad for colorimetric detection of CN- in 100% aqueous solution.
    Author: Liu S, Yang M, Liu Y, Chen H, Li H.
    Journal: J Hazard Mater; 2018 Feb 15; 344():875-882. PubMed ID: 29190585.
    Abstract:
    A new colorimetric fluorescent probe (MCy) for CN- is designed and synthesized based on triphenylimidazole-hemicyanine dyad. The probe shows high selectivity towards CN- in 100% aqueous solution even in the presence of other competitive anions such as F-, Cl-, AcO-, NO2-, H2PO4-, I-, SCN-, SO42-, NO3-, HCO3-, Br- and S2-. Upon nucleophilic addition of CN- to the indolium group, the probe displays large blue-shift in UV-vis spectrum and remarkable "turn-on" fluorescence owing to the disruption of intramolecular charge transfer. Meanwhile, the probe also undergoes a naked-eye discernible color change from orange to light pink in the sunlight as well as an obvious fluorescence color change from non-emissive to bright blue under a UV lamp. The detection limit of CN- in aqueous solution can be as low as 20.6nM, which is much lower than the permissible level of CN- in drinking water according to the WHO. In addition, the probe has been successfully used to determine CN- in real water samples as well as to fabricate test paper kit for CN- detection.
    [Abstract] [Full Text] [Related] [New Search]