Acta Chimica Slovaca (ACS) publishes papers on fundamental and applied aspects of chemistry, biochemistry, chemical technology, chemical engineering and process control, biotechnology and food technology. Welcome are also topics which include chemical aspects of materials, physical chemistry and chemical physics, analytical chemistry, macromolecular chemistry and biomedical engineering.

Solvent Dependent Fluorescence Study of 5-Phenyl-3-[(E)-2-Phenylvinyl]-4,5-Dihydro-1H-Pyrazole-1-Carbaldehyde

Pramod Singh *, Jagmohan S. Negi † a, B. S. Rawat b, M. S. M. Rawat, Geeta Joshi nee Pant, G. C. Joshi c

Department of Chemistry, HNB Garhwal University, Srinagar Garhwal- 246 174, Uttarakhand, India
a Herbal Research and Development Institute, Mandal, Gopeshwar (Chamoli)- 246 401, Uttarakhand, India
b Department of Physics, HNB Garhwal University, Srinagar Garhwal- 246 174, Uttarakhand, India
c Department of Physics, HNB Garhwal University, Srinagar Garhwal- 246 174, Uttarakhand, India

E-mail: * negi_pramod04@rediffmail.com, † negi_js1981@yahoo.co.in

Abstract: The focus of the present paper is to find out the absorption and emission characteristics of the synthesized compound 1 (5-phenyl-3-[(E)-2-phenylvinyl]-4,5-dihydro-1H-pyrazole-1-carbaldehyde). Different solvents from non-polar to polar were taken to find extinction coefficients, quantum yields and the ratio of the excited and ground state dipole moments of the compound. Bakhshiev’s and Kawski-Chamma-Viallet’s correlations were taken to find the ratio of excited to ground state dipole moment and it was found to be 1.5.

Keywords: Absorption, Dipole moment, Fluorescence, 2-Pyrazoline, Quantum yield, Solvatochromic effects

Full paper in Portable Document Format: acs_0099.pdf

Acta Chimica Slovaca, Vol. 4, No. 2, 2011, pp. 136—144