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Pramana - Journal of Physics

Pramana - Journal of Physics: Preface

World University root node

Journal of the Indian Chemical Society

Crystal structure of iron(III) complex with pyridine-2,6-dicarboxylic acid

Complexes of Co-III with pyrazine-2,6- and pyridine-2,6-dicarboxylic acids have been synthesized. The ligands act as tridentate coordinating through the heterocyclic ring nitrogen and two carboxyl oxygens in both the complexes. Single crystal X-ray analyses of both the complexes reveal the structures as distorted octahedral, Co sitting at the center and surrounded by one tridentate ligand and three ammonia. The counter anion is nitrate.

JOURNAL OF THE INDIAN CHEMICAL SOCIETY

Synthesis and crystal structure of cobalt(III) complexes with pyrazine-2,6-and pyridine-2,6-dicarboxylic acids

A complete analysis of the magneto-optic drift effects of optically active ions, incorporating buffer-induced collision mechanisms within the Markov limit was carried out. It was shown that a combination of the cyclotron motion of charged active atoms in an applied coaxial magnetic field and the usual light-induced drift due to velocity-changing collisions with a buffer gas yields an effective way to confine the optical piston action to a one-dimensional motion.

Physical Review A. Atomic, Molecular, and Optical Physics

Magneto-optic drift of ions

Complexes of Cr-III, Co-III, Al-III and Bi-III with pyrazine-2-carboxylic acid along with some of their picolinates have been synthesized. The ligands are bidentate coordinating through a heterocyclic ring nitrogen and a carboxyl oxygen. A single crystal X-ray analysis on Cr(Pz-2-COO)(3) reveals the structure as highly distorted octahedral, Cr sitting at the center and surrounded by the bidentate ligand.

Study on some metal(III) complexes with pyrazine-2-carboxylic and pyridine-2-carboxylic acids

Light-induced drift of optically active atoms in a buffer gas is a consequence of the unequal diffusive frictions suffered by the excited and the ground-state atoms. This drift can be used to create an “optical piston", in which the active atoms are pushed forward by light through the semipermeable membrane of the buffer gas. Normally, optical piston effect is studied when the active atoms are neutral in a confined one-dimensional situation. We present a detailed theory of this phenomenon when the active atoms are charged and a magnetic field is applied for “tuning” the direction as well as the magnitude of the drift, thus removing the necessity of confinement. Our study is in different geometries of the light beam and the magnetic field, first in the weak collision model, and then for the strong collision and the Boltzmann-Lorentz models. © 2001 The American Physical Society.

Physical Review A - Atomic, Molecular, and Optical Physics

Magnetochiral birefringence observed in a ring laser configuration for two chiral compounds was studied. True magnetochiral variation of the refractive index was isolated independent of the associated polarization effects. The change in refractive index in limonene was found to be 10-10 at 488 nm with a magnetic field of 1.3KG.

Physical Review Letters

Observation of magnetochiral birefringence

In this study, an attempt was made to solve the dynamics of the Stern-Gerlach spin in contact with a linearly dissipative environment at an arbitrary temperature. All the previous results in the high-temperature limit were recovered. It was observed that except for the extreme quantum case of zero temperature, the system shows the expected classical diffusive behavior over long times.

Quantum theory of a Stern-Gerlach system in contact with a linearly dissipative environment

Drift of optically active atoms in a buffer gas induced by an incident light field is a consequence of the unequal diffusive frictions suffered by the excited and the ground-state atoms. We investigate this light-induced drift in the presence of a magnetic field in a direction perpendicular to the incident light, which gives rise to an interesting effect, appropriately called the "optical Hall effect.".