April 2010

Redox and spectral behaviour of copper (II)-chloro and bromo complexes in some nonaqueous solvents

The redox behaviour of 3 × 10-3 M each of CuCl2.2H2O and CuBr2.H20 have been investigated at Platinum (Pt) electrode and 1 × 10-3 M CuCl2.2H20 at glassy carbon (GCE) electrode in dimethylformamide (DMF), dimethylsulfoxide (DMSO), acetonitrile (AN) and ethanol/0.1 M tetrabutylammonium perchlorate (TBAP) using cyclic voltammetry. For CuCl2 System, Epc1 and E0 are more positive, ∆Ep...

Author(s): E. J. Ukpong, N. W. Akpanudo and J. Prasad

April 2010

Biotransformation of n – phenyl cyclohexenylimide and 3, 5 – dinitrobenzoic acid

N - phenyl cyclohexenylimide and 3,5 - dinitrobenzoic acid were subjected to biotransformation on maize fermenting system. These compounds were left for two weeks in the fermenting system and later extracted with a mixture of n - hexane, diethyl ether and ethanol. The TLC of the biotransformed products were carried out. The structures proposed for the isolated biotransformed products were based on FT - IR and NMR...

Author(s): O. A. Owolodun and G. A. Olatunji

April 2010

Dynamical behavior of coumarin compounds in alcohol solvents

Dynamical behavior of 3-(2-Benzimidazolyl)-7-(DiethylAmino) coumarin [coumarin7 (C7)] and 3-(2-N-Methylbenzimidazolyl)-7-N, N-diethylamino coumarin [coumarin30 (C30)] laser dyes have been examined in methanol as a function of temperature. It is observed that, the rotational motion of probe molecule in methanol solvent increases as the temperature increase. We also investigated that, C30 rotates faster than C7 in the...

Author(s): U. S. Raikar, V. B. Tangod, C. G. Renuka and B. M. Mastiholi