| Popis: |
In this report we have studied, the substitutional effect on photophysical properties of newly synthesized isomeric benzocoumarin-Sesamol Conjugates using absorption, steady-state fluorescence emission, and time-resolved emission measurements. The structural characterization of the synthesized dyes was carried out using FT-IR, 1H-NMR, 13C-NMR, and MS. The ground states are estimated using theoretical (ab-intio) experimental techniques. The excited state dipole moment was calculated using the solvatochromic method. Stoke's shift exhibits a redshift with an increase in solvent polarity for synthesized indicating a p-p* transition. The HOMO-LUMO energy gaps computed from density functional theory and absorption threshold wavelengths are found to be in good agreement with each other and also support intramolecular charge transfer (ICT). The Global chemical reactivity descriptor parameter and electrostatic potential (MESP) plots suggest that molecules have strong electrophilic and nucleophilic sites. The preliminary photophysical observations and results suggest that the fluorescent dyes can be considered as potential material for the construction of solar cells, fluorescent probes, and chemosensors. |
