Proton Chemical Shifts of Solute Molecules in Binary Solvent Mixtures: Reversal of the Roles of Solute & Perturbing Solvent

746-74

Carbonyl Stretch Intensity of Benzophenone in Binary Solvent Mixtures of Chloroform, Methylene Chloride & Trichloroethylene with Cyclohexane

743-74

Chemical shifts due to long range dispersion interactions

Dispersion chemical shifts, &#963;<SUB>w</SUB>, for a variety of solute-solvent systems have been obtained by three different methods. The value of &#963;<SUB>w</SUB> for a given system differs with the method employed for evaluating the characteristic frequency

Electronic and infrared spectral band shifts in binary solvent mixtures

A systematic study on the electronic and infrared spectral band shifts of a variety of solutes in binary solvent mixtures has been carried out. Similar to the behaviour of proton shifts and spectral intensities of solutes in binary solvent mixtures the band shifts are also found to obey the relationship &#916;&#957;=K&#916;&#957;&#176;Cp/(1+KCp) where &#916;&#957; is the band shift of a solute in binary solvent mixture containing Cp moles of perturbing solvent with respect to its band position in an inert solvent, K and &#916;&#957;&#176; are constants for the system under consideration. An attempt has been made to give an explanation for the relationship

Kinetics of Oxidation of Some Substituted 4-Oxanones by Vanadium(V)

122-12

Bright and dark Bragg solitons in a fiber Bragg grating

We investigate the nonlinear pulse propagation through the fiber Bragg grating structure where the pulse dynamics are governed by the nonlinear-coupled mode (NLCM) equations. Using multiple scale analysis, we reduce the NLCM equations into the perturbed nonlinear Schrodinger (PNLS) type equation. To construct the bright and dark Bragg solitons in the upper and lower branches of the dispersion curve, we solve the PNLS equation using the coupled amplitude-phase method

Spectroscopic studies of solute-solvent interactions

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Grating solitons near the photonic bandgap of a fiber Bragg grating

In this paper, we consider the nonlinear pulse propagation through a fiber Bragg grating (FBG) structure wherein the nonlinearity includes both cubic and quintic effects. We study theoretically the formation of bright grating solitons in such a FBG when the carrier frequency of a nonlinear laser pulse is detuned out of the proper edge of the photonic bandgap (PBG). By using multiple scale analysis, we investigate the generation of the bright soliton near the PBG with the higher order linear and nonlinear effects. We also study the impact of quintic nonlinearity on the dispersion curves by deriving the nonlinear dispersion relation from the governing equations