Complexation of Methylthio and Methoxy Derivatives of Styryl Dyes with Cucurbit[6]uril

The complexation of the styryl dyes 1-ethyl-4-{( E )-2-[4-(methylthio)phenyl]vinyl}pyridinium perchlorate ( 1 ) and 1-ethyl-4-[( E )-2-(4-methoxyphenyl)vinyl]pyridinium perchlorate ( 2 ) with cucurbit[6]uril (CB[6]) in aqueous solutions has been studied using steady-state and time-resolved fluoresce...

Full description

Saved in:
Bibliographic Details
Published in:High energy chemistry 2023-12, Vol.57 (Suppl 3), p.S410-S415
Main Authors: Ivanov, D. A., Kolesnikova, O. P., Kryukov, I. V., Dubinets, N. O., Petrov, N. Kh, Aleksandrova, N. A., Gromov, S. P.
Format: Article
Language:English
Subjects:
Aqueous solutions
Chemistry
Chemistry and Materials Science
Complexation
Dyes
Fluorescence
Inclusion complexes
Physical Chemistry
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The complexation of the styryl dyes 1-ethyl-4-{( E )-2-[4-(methylthio)phenyl]vinyl}pyridinium perchlorate ( 1 ) and 1-ethyl-4-[( E )-2-(4-methoxyphenyl)vinyl]pyridinium perchlorate ( 2 ) with cucurbit[6]uril (CB[6]) in aqueous solutions has been studied using steady-state and time-resolved fluorescence spectroscopy. The binding constant of the 1 : 1 inclusion complex of 1 and CB[6] is log K = 6.28, with fluorescence increasing threefold, and the 1 : 1 complex of 2 and CB[6] has log K = 5.99, with fluorescence increasing by four times. The fluorescence decay of the dyes and their complexes has two characteristic times, the short one of ~2–3 ps and the long one on the order of ten picoseconds. In inclusion complexes, the latter is greater than in the free dyes. The mechanism of photobleaching of the studied dyes and their complexes with cucurbit[6]uril is considered.
ISSN:0018-1439
1608-3148
DOI:10.1134/S0018143923090060