An insight into the synergistic and mechanistic aspects of (IrCl₃ + PdCl₂) bimetallic and IrCl₃, PdCl₂ individual catalysts on oxidation-kinetics of kojic acid with alkaline chloramine-T

The kinetics of (IrCl3+PdCl2) bimetallic catalytic mixture as well as individual IrCl3 and PdCl2 catalyzed and uncatalyzed oxidation of kojic acid by sodium-N‑chloro-p-toluenesulfonamide (chloramine-T or CAT) in the presence of NaOH has been explored at 298 K. Under identical experimental conditions, the kinetics for the catalyzed and uncatalyzed reactions was found to unveil varied orders. The rates of catalyzed reactions were found to be 9–38 folds faster than the uncatalyzed reaction. The observed rates of catalyzed reactions called for the existence of synergistic effect in an equimolar mixture of IrCl3+PdCl2. Justifications for the observed results have been provided by plausible mechanisms. © 201

Coherent scattering cross sections of some lanthanides for 241Am and 137Cs gamma rays at low momentum transfer

In this paper, we report the coherent scattering cross sections of some lanthanides at low momentum transfer in four angular ranges of (0°-4°), (0°-6°), (0°-8°) and for 241Am (59.54 keV) and 137Cs (661.6 keV) gamma rays. The coherent scattering cross sections were derived by subtracting the small contribution of the corresponding angle integrated incoherent scattering cross sections from the experimentally measured total (coherent + incoherent) scattering cross sections for the elements and energies of interest. The coherent scattering cross sections were found to agree with the corresponding theoretical cross sections within the range of experimental errors. The theoretical coherent scattering cross sections were computed by numerically integrating the S-matrix data of the elements in the angular ranges of interest. The incoherent scattering cross sections were based on the compilations which make use of the non-relativistic Hartree-Fock (NRHF) model for the atomic charge distribution