Nilanjal Misra; Virendra Kumar; Swarnima Rawat; Narender Kumar Goel; Shubhangi A. Shelkar; Lalit Varshney
Abstract
A facile, green radiolytic route is described for the synthesis of poly (2,3-Epoxypropylmethacrylate) (PEPMA) stabilized Gold nanoparticles (PEPMA-Au-NPs) via gamma radiolytic reduction of an aqueous solution of HAuCl4 precursor ions containing EPMA as a stabilizing/capping agent. The effect of different ...
Read More
A facile, green radiolytic route is described for the synthesis of poly (2,3-Epoxypropylmethacrylate) (PEPMA) stabilized Gold nanoparticles (PEPMA-Au-NPs) via gamma radiolytic reduction of an aqueous solution of HAuCl4 precursor ions containing EPMA as a stabilizing/capping agent. The effect of different experimental parameters, such as precursor ions and stabilizing agent concentration, gamma radiation dose and solvent polarity on the properties of Au-NPs were studied. PEPMA-Au-NPs system was characterized by UV-visible spectroscopy, TEM and particle size analysis techniques. PEPMA-Au-NPs showed characteristic Localized Surface Plasmon Resonance (LSPR) band at ~530nm. TEM analysis confirmed the formation of spherical particles with an average size of 7.6nm±3.1nm. PEPMA-Au NPs prepared under optimized conditions were employed as an efficient catalytic system to carry out the reduction of p-nitrophenol (PNP) to p-aminophenol (PAP). The reaction was observed to follow pseudo first order kinetics and demonstrated good efficiency in carrying out the catalytic reduction reaction under optimized conditions. Copyright © 2018 VBRI Press.
Eagambaram Murugan; Chennakesavapuram R Akshata; Annie Stephy
Abstract
Capecitabine (CPT) is an oral antineoplastic prodrug of 5-Flurorouracil (5-FU), administered for the treatment of metastatic breast and colorectal cancers. Detection of trace quantity of Capecitabine in pharmaceutical drug dosages is very crucial and essential owing to its life threating toxic adverse ...
Read More
Capecitabine (CPT) is an oral antineoplastic prodrug of 5-Flurorouracil (5-FU), administered for the treatment of metastatic breast and colorectal cancers. Detection of trace quantity of Capecitabine in pharmaceutical drug dosages is very crucial and essential owing to its life threating toxic adverse effects. In this study, an effective conducting nanohybrid namely, MWCNT-PAMAM (G3)-AuNps was developed and characterized by Raman, FT-IR, SEM and HR-TEM techniques. The developed conducting nanohybrid was used for fabrication of effective and stable active electrode viz., GCE-MWCNT-PAMAM (G3)-AuNps which in turn demonstrated for effective sensing of trace quantity of Capecitabine i.e., at a concentration of 5 x 10-12 M under lower potentials. The reduction of Capecitabine was investigated through cyclic voltammetry in the presence of H2SO4 (pH 1.54) as supporting electrolyte. The presence of Capecitabine exhibited an irreversible reductive peak potential at ~0.835 V which was observed from mixed diffusion-adsorption controlled processes. The mechanism for electrochemical-chemical reduction, trace and rapid determination of Capecitabine are reported. This newly developed electrode has a potential to sense/ detect the Capecitabine at the concentration of 5 x 10-12 M under lower potentials. Further, it is expected that there is a strong scope for quality control in pharmaceutical formulates. Copyright © 2017 VBRI Press.
