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Aggregation process of riboflavin molecules in binary mixtures: water - dioxane, water - DMSO, and ethanol - isobutanol, were investigated using spectroscopic methods and quantum-chemical calculation. It was shown that at a constant concentration of riboflavin and different ratios of binary mixtures, a deformation of the electronic absorption spectra with a hypochromic effect is observed. The observed changes are caused by the formation of a hydrogen bond and dipole-dipole interaction between riboflavin molecules, which is accompanied by a shift and resonance splitting of excited electronic levels. Copyright © 2020 Elsevier B.V. All rights reserved.


Salikh Kh Astanov, Guzal K Kasimova, Eldar N Kurtaliev, Negmat N Nizomov, Abduvakhid Jumabaev. Electronic nature and structure of aggregates of riboflavin molecules. Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy. 2021 Mar 05;248:119177

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PMID: 33257239

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