Analysis of 2-Phenoxyaniline Fluorescence Quenching by Chloromethanes
Radha N.1, Swaminathan M.2
1Radha N, Research Laboratory, Department of Physics, Kalasalingam University, Krishnankoil (Tamil Nadu), India.
2M. Swaminathan, Department of Chemistry, International Research Centre, Kalasalingam Academy of Research and Education Deemed to be University, Krishnankoil (Tamil Nadu), India.
Manuscript received on 23 November 2019 | Revised Manuscript received on 17 December 2019 | Manuscript Published on 30 December 2019 | PP: 257-259 | Volume-9 Issue-1S4 December 2019 | Retrieval Number: A11561291S419/19©BEIESP | DOI: 10.35940/ijeat.A1156.1291S419
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Abstract: The fluorescence quenching of 2-phenoxyaniline (2PAN) by chloromethanes were studied in hexane, dioxane, acetonitrile and methanol. The quenching rate constants (kq) are large with CCl4 and CHCl3 and close to diffusion rate constant (kdiff) and viscosity dependent, where with CH2Cl2 they are less. No clear cut variation of solvent polarity or viscosity is observed for CH2Cl2. Intermediate donor-acceptor complex formation is suggested for CH2Cl2 quenching. kq varies with electron affinity of quenchers suggesting the formation of non-emissive exciplex in quenching.
Keywords: Fluorescence Quenching; Chloromethanes; 2-Phenoxyaniline, Non-emissive Exciplex, Solvent Effect.
Scope of the Article: Bio-Science and Bio-Technology