Title : Photophysical and electrochemical study of pyrrole derivative molecule

The absorption and fluorescence spectra of newly synthesized 4-[5-(2,5-Dimethyl-pyrrol-1-yl)-[1,3,4]thiadiazol-2-ylsulfanylmethyl]-6-methoxy-chromen-2-one(DTYMC) compound were recorded in various solvents like acetone, acetonitrile, chloroform, dimethyl formamide(DMF),1,4-dioxane, ethanol, ethyl acetate, methanol, tetrahydrofuran (THF) and dimethylsulphoxide (DMSO) at room temperature in order to estimate the ground and excited state dipole moment. Here, the groundstate (μ_g) andexcited states (μ_e) wereestimated using Lippert’s, Bakshiev’sand Kawski-Chamma-Viallete’s equations by thesolvatochromic shift method. The results were signified that the excited state dipole moment is greater than the ground state dipole moment, which indicates the excited state dipole moment is more polar than the ground state dipole moment of the molecule. The bond angle between the ground state and excited state dipole moments were found to be 00, The change in dipole moment(?μ) was calculated using microscopic solvent polarity parameter(E_T^N). Further multiple linear regression analysis of Kamlet-Taft parameter, HOMO-LUMO energy, were determined by cyclic voltammetry using phosphate buffer solution.

Dr. Shivaprasadagouda Patil is an Assistant Professor of Physics at J.S.S. Arts, Science, and Commerce College, Gokak (591307), Belagavi, Karnataka, India. With over 10 years of teaching experience, he has served in various administrative and academic roles. Dr. Patil cleared the CSIR-NET JRF in 2015 and completed his PhD in 2023, with a research focus on "Spectroscopic Studies on Biologically Active Organic Molecules." His research interests include fluorescence spectroscopy, nanomaterials, fluorescence quenching, and computational studies, such as Gaussian simulations and molecular docking. He has published more than 10 peer-reviewed journal articles and has actively participated in 8 international conferences, presenting oral papers. Additionally, he has reviewed 3 articles for international peer-reviewed journals.