Downloads: 5 | Views: 58 | Weekly Hits: ⮙5 | Monthly Hits: ⮙5
Analysis Study Research Paper | Chemical Sciences | India | Volume 13 Issue 6, June 2024 | Popularity: 5.4 / 10
Hypersensitive Transitions: A Greener Micellar Study of Tb(III)-Indole Derivative Complexes through Optical Absorption Spectra
Ramswaroop Regar, Sumit Ghasia, Hemendra Singh Bhandari
Abstract: Optical absorption spectra of Terbium(III)-complexes with Nitrogen and Oxygen containing ligand Indole derivative [viz: 1H-indole-3-carboxylic acid (I3CA), 1-(1H-indole-3-yl)ethanone (3ATI), and 1H-indole-3-carbaldehyde (I3CD)] have been studied and analyzed in non-micellar solvent (Alcohol+water) as well as micellar surfactant medium [Polyethylene glycol monododecyl ether (BRIJ35), Cetyltrimethylammonium bromide (CTAB), Sodium dodecyl sulphate (SDS)] at 298 K temperature. UV-Visible absorption spectra of metal-ligand complexes produce eight multiplet-to-multiplet transition bands in the 250?400 nm range. These transitions originate from the 7F6 ground state and are obtained as 5H6 ? 7F6, 5H7 ? 7F6, 5D1 ? 7F6, 5L8 ? 7F6, 5L9 ? 7F6, 5G5 ? 7F6, 5L10 ? 7F6, and 5G6 ? 7F6 for Terbium(III)-indole derivatives complexes. The transition 5H7 ? 7F6 is highly sensitive as it has a high Oscillator Strength (P) with the non-ionic BRIJ35 micellar medium. The hypersensitivity of transitions and enhancements in spectral peaks are applicable in resolution techniques. In this optical absorption study, intensity parameters are studied by applying Judd-Ofelt theory. Covalency characters are assigned by four covalency parameters, ?, b1/2, and ? for the studied metal-ligand complexes and are found better in green micellar medium. Green micellar solvents are safer for the environment.
Keywords: Oscillator strength, Micellar medium, Hypersensitive transition, Covalency parameters
Edition: Volume 13 Issue 6, June 2024
Pages: 1936 - 1947
DOI: https://www.doi.org/10.21275/SR24066091725
Make Sure to Disable the Pop-Up Blocker of Web Browser