African Journal of Biotechnology Vol. 6 (22), pp. 2565-2567, 19 November 2007   

ISSN 1684–5315 © 2007 Academic Journals        

Short Communication

Perturbation of spectra properties of 3,4-diphenyl thiophene by polar and non polar solvents

Adeogun, A. I.¹*, Egwuonwu, N. W¹. and Bello O. S.²

¹Department of Chemistry, University of Ibadan, Ibadan. Nigeria.

²Chemistry Department, Ladoke Akintola University of Technology, Ogbomoso. P.M.B. 4000. Ogbomoso, Oyo State, Nigeria.

*Corresponding author. E-mail: abuaisha2k3@yahoo.com.

Accepted 29 June, 2007

The UV/visible spectra of 3,4-diphenyl thiophene were obtained in various solvents (both polar and non polar). The wave number of transition energies, corresponding molar absorptivities and oscillation frequency were determined. Three bands were obtained in solvents such as cyclohexane, propan-2-ol, methanol and ether. Two bands are obtained in n-hexane and 1,2- dichloroethane, while 1,4-dioxane give a single band. Transitions are assigned to these bands according to their shift due to the effect of solvents.

Key words: 3,4-diphenylthiophene, fluorenone, frank-condon, excited state, polar and non polar solvent, electronic transitions.