Abstract:
Imine linked dipodal organic receptor R1 has been synthesized
and well characterized using different spectroscopic techniques
such as 1
HNMR, 13CNMR 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 reprecipitation 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
HSO4
ions. Detection limit was found to be 8.2nM and
regression coefficient equal to 0.982. ONPs behave selectively
towards HSO4
ions even in the presence of competitive
anions. Optical properties of ONPs were also examined. UVVisible and Fluorescence spectrophotometer showed significant change when TBA HSO4
ions were added to it. Prepared
sensor was incorported for real sample containing HSO4
ions
and results showed accuracy as high as 95%
