NOPR Collection:

Photocatalytic reduction of nitrite and nitrate ions to ammonia on ZnO-Fe₂O₃ coupled semiconductor

2017-04-20T07:05:33Z

Title: Photocatalytic reduction of nitrite and nitrate ions to ammonia on ZnO-Fe₂O₃ coupled semiconductor Authors: Ranjit, K T; Viswanathan, B Abstract: Coupling of a stable short bandgap semiconductor to an unstable large bandgap semiconductor can be used for sensitization as well as prevention against photocorrosion. Relatively efficient photoassisted reduction can be realized on these systems without the need of a noble metal catalyst. Page(s): 351-352

Recent developments in processing of Mn - Zn ferrites - An overview

2017-04-20T07:02:30Z

Title: Recent developments in processing of Mn - Zn ferrites - An overview Authors: Deshpande, C E; Date, S K Page(s): 353-365

Energy transfer in classical trajectories of atomic-diatomic molecule collisions

2017-04-20T06:59:17Z

Title: Energy transfer in classical trajectories of atomic-diatomic molecule collisions Authors: Abdel-Halim, Hamzeh M; AI-Shihi, Badria I Abstract: Energy transfer in nonreactive collisions of atom-diatomic molecules has been studied in three dimensions using Monte Carlo classical trajectories. Equations of motion, which predict the positions and momenta of the colliding particles after each step in the trajectory, have been integrated numerically by Runge-Kutta-Gill and Adams-Molton methods. The potential energy surfaces employed in the calculation, between the atom and each atom of the diatomic molecule, are Morse potentials plus an exponential repulsive term. Effects of the potential well-depth, initial energies (translational, rotational, and vibrational), and the masses of the colliding particles on energy transfer have been studied. The results show strong dependence of energy transfer type and quantity on these parameters. Dynamical analysis of the observations is given in order to get some understanding of the mechanism of energy transfer in nonreactive collisions. Page(s): 366-372

Energy transfer in classical trajectories of atomic-diatomic molecule collisions Platinum(ll) complexes of substituted pyridine and pyrazole derivatives

2017-04-20T06:57:49Z

Title: Energy transfer in classical trajectories of atomic-diatomic molecule collisions Platinum(ll) complexes of substituted pyridine and pyrazole derivatives Authors: Hossain, A G M Mostafa; Ogura, K Abstract: A series of new platinum(II) halo complexes of substituted pyridines and pyrazoles: [trans- PtCI₂(C₇H₇N)₂], [trans-PtCI₂(C₃H₄N₂)₂], [trans-PtCI₂(C₆H₇N)₂] and [trans-PtCl₂(C₄H₆N₂)₂] has been synthesized, and the complexes have been characterised on the basis of their IR, ¹H NMR, UV/vis and elemental analysis data. Trans-dichloroplatinum(II) complexes of nitrogen cyclic compounds have been prepared through the reaction of K₂[PtCl₄] with the corresponding ligands in water or a mixture of water and an organic solvent. The coordination reaction of 3- or 4-substituted pyridine is complete within 10 h and the yields are more than 60%, but that of 2-substituted pyridine requires a longer time (15 h) and the yields are low (44%). Platinum complexes of pyridine with a vinyl group at the ortho position could not be obtained, but those with a methyl or a vinyl group at the para position have been obtained. Each complex has a trans square-planar structure, the platinum being coordinated by two halogen and two nitrogen atoms and lying at a centre of symmetry. Page(s): 373-378

NOPR Collection:

Photocatalytic reduction of nitrite and nitrate ions to ammonia on ZnO-Fe2O3 coupled semiconductor

Recent developments in processing of Mn - Zn ferrites - An overview

Energy transfer in classical trajectories of atomic-diatomic molecule collisions

Energy transfer in classical trajectories of atomic-diatomic molecule collisions Platinum(ll) complexes of substituted pyridine and pyrazole derivatives

Photocatalytic reduction of nitrite and nitrate ions to ammonia on ZnO-Fe₂O₃ coupled semiconductor