Micellar control over tautomerization and photo-induced electron transfer of Lumichrome in the presence of aliphatic and aromatic amines: a transient absorption study. (1st March 2017)

• Record Type: Journal Article
• Authors: Sengupta, Chaitrali; Sarangi, Manas Kumar; Sau, Abhishek; Basu, Samita
• Is Part Of: Methods and applications in fluorescence. Volume 5:Number 1(2017:Mar.)
• Publication Date: 2017-03-01
• Subjects: tautomerization -- photo-induced electron transfer -- transient absorption; Fluorescence spectroscopy -- Periodicals; Fluorescence -- Periodicals; Spectrometry, Fluorescence -- Periodicals; Fluorescence -- Periodicals; Fluorescence; Fluorescence spectroscopy; Periodicals; 535.352
• DOI: 10.1088/2050-6120/aa5d2b
• Languages: English
• ISSNs: 2050-6120

Abstract

Abstract: Lumichrome (Lc), a molecule consisting of a trinuclear alloxazine moiety is our present subject of interest. This molecule is subjected to tautomerization in the presence of pyridine, acetic acid, etc, through the formation of an eight-membered ring. In our present contribution, we have attempted to analyze the influence of the presence of an aliphatic amine, triethylamine (TEA) and an aromatic amine, N, N-dimethylaniline (DMA) in the double proton transfer step of the tautomerization as well as the photo-induced electron transfer (PET) from those amines to Lc. We have studied these phenomena within micelles, anionic and neutral, to observe the effect of confinement. Through our experiments, it could be stated that along with tautomerization and proton transfer, there is also evidence of PET in triplet excited state.