Aggregation-induced emission of 5-(benzylidene)pyrimidine-2,4,6-triones
Агрегационно-индуцированная эмиссия 5-(бензилиден)пиримидин-2,4,6-трионов
Mendigaliyeva S.S. Birimzhanova D.A. Irgibaeva I.S. Barazhkov N.N. Sakhno Y.E.
2022E.A.Buketov Karaganda State University Publish House
Bulletin of the Karaganda University Chemistry Series
2022#105Issue 139 - 49 pp.
5-(Benzylidene)pyrimidine-2,4,6-triones with different substituents on the phenyl rings: 5-(4’-dimethyl-aminobenzylidene) barbituric acid and 5-(4’-methoxybenzylidene) barbituric acid were synthesized, and their spectral-luminescent properties were investigated. A decreasing fluorescence efficiency in the solid-state is general and is mainly attributed to the intermolecular vibronic interactions, which induce the nonradiative deactivation process. Whereas the isolated dye molecules are virtually non-luminescent in dilute solutions, they become highly emissive upon solution thickening or aggregation in poor solvents or in the solid-state, show an increase of luminescence intensity, the phenomenon of the aggregation-induced emission (AIE phenomenon). The development of efficient luminescent materials is a topic of great current interest. The emission color is changed from red (maximum at 630 nm) to green (maximum at 540 nm) by varying the substituent on the phenyl ring from dimethylamino to the methoxy group. Theoretical calculation shows that the dye molecules aggregation-induced emission characteristics result from intermolecular interactions. Utilizing such features, the molecules can be employed as fluorescent probes for the detection of the ethanol content in aqueous solutions.
aggregation-induced emission , barbituric acid , dye molecules , fluorescence peak intensities , fluorescent probes , intramolecular rotations , luminophore , solid state , substituent phenyl ring
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Chemistry Department, L.N. Gumilyov Eurasian National University, Satpayev street, 2, Nur-Sultan, 010000, Kazakhstan
L.N. Gumilyov Eurasian National University, Satpayev street, 2, Nur-Sultan, 010000, Kazakhstan
Professor of Chemistry Department, L.N. Gumilyov Eurasian National University, Satpayev street, 2, Nur-Sultan, 010000, Kazakhstan
R&D and Technical Services, Micro-Tracers, Inc., 1370 Van Dyke Avenue, San Francisco, 94124, CA, United States
Department of Plant and Soil Sciences, University of Delaware, 154a Townsend Hall, 531 S. College Avenue Newark, Delaware, 19713, United States
Chemistry Department
L.N. Gumilyov Eurasian National University
Professor of Chemistry Department
R&D and Technical Services
Department of Plant and Soil Sciences
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