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Imine‐Linked Electrochemical Sensor for Selective Detection of HSO 4 − Ions in Aqueous Media.
Author(s) -
Billing Beant K.,
Agnihotri Prabhat K.,
Singh Narinder
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201601233
Subject(s) - dynamic light scattering , ion , aqueous solution , chemistry , analytical chemistry (journal) , detection limit , cyclic voltammetry , electrochemistry , imine , materials science , nanoparticle , electrode , organic chemistry , chromatography , nanotechnology , catalysis
Imine linked dipodal organic receptor R1 has been synthesized and well characterized using different spectroscopic techniques such as 1 H NMR, 13 C NMR and mass spectroscopy. R1 showed interesting potential for anion recognition. Its sensing ability has been evaluated by processing R1 into organic nanoparticles (ONPs). ONPs of R1 were developed using re‐precipitation method. ONPs were first characterized using Dynamic light scattering (DLS) to estimate average size distribution of particles and then confirmed from Transmission electron microscopy (TEM). Further, ONPs were examined for their electrochemical behaviour using cyclic voltammetry and differential pulse voltammetry particularly in aqueous medium. ONPs were evaluated for binding test with various tetra butyl ammonium salts of anion and found to be selective towards HSO 4 − ions. Detection limit was found to be 8.2nM and regression coefficient equal to 0.982. ONPs behave selectively towards HSO 4 − ions even in the presence of competitive anions. Optical properties of ONPs were also examined. UV‐Visible and Fluorescence spectrophotometer showed significant change when TBA HSO 4 − ions were added to it. Prepared sensor was incorported for real sample containing HSO 4 − ions and results showed accuracy as high as 95 %.