The potential constants of diacetylene molecule has been evaluated using kinetic constants. The other molecular constants such as the generalised vibrational mean amplitudes, shrinkage constants, Coriolis coupling constants and centrifugal distortion constants are also calculated using the vibrational frequencies and the results discussed.

The laser Raman spectra of 2,4- and 2,2′-dibromophenols have been recorded in the region 200–4000cm^-1 on a Cary Model 82 grating spectrophotometer with an argon laser source. The observed frequencies have been assigned to the various modes of vibrations in terms of fundamentals assumingC_s and C_2v point group symmetry.

Cyclic voltammetric responses of electrochemically treated polycrystalline gold surfaces have been examined using Cu-UPD probe reactions (UPD-underpotential deposition). The treatment procedure used appears to induce preferential crystal orientation of the Au surface with a very small roughness factor and affords a simple method to obtain well-defined surfaces for electrochemical studies.

Initial growth stages of the ultra thin films of germanium (Ge) prepared by ion beam sputter deposition have been studied using atomic force microscope (AFM) and interference enhanced Raman scattering. The growth of the films follows Volmer-Weber growth mechanism. Analysis of the AFM images shows that Ostwald ripening of the grains occurs as the thickness of the film increases. Raman spectra of the Ge films reveal phonon confinement along the growth direction and show that the misfit strain is relieved for film thickness greater than 4 nm.