Abstract
In this study, density functional theory (DFT) and time-dependent DFT (TD-DFT) studies of methyl 4-aminobenzoate and methyl 4- amino-2-hydroxybenzoate and their inclusions complexes with α and γ-cyclodextrins were applied to control the effect of cyclodextrins on the absorption and emission properties of P-methylaminobenzoate derivatives. Absorption and emission spectra of free and encapsulated P-methylaminobenzoate derivatives were successfully analysed and compared with experimental results. Interestingly, conformational changes between ground and excited states of both fluorophores were also studied.
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Acknowledgements
The investigation was supported by the Algerian Ministry of Higher Education and Scientific Research (project PRFU B00L01UN240120200002).
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Badi Sonia performed the calculation and analyse the results. Madi fatiha wrote the manuscript. Nouar Leila revise the manuscript. Gheid abdelhak supervised the work.
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Highlights
• DFT and TD-DFT methods were successfully applied to obtain ground and excited states geometries of P-methylaminobenzoate derivatives guests and their inclusion complexes (1:1) with α and γ-CDs.
• Largely modification of absorption and emission spectra of methyl 4-aminobenzoate (guest 1) and methyl 4- amino-2-hydroxybenzoate (guest2) were observed after interactions with CDs.
• The presence of two overlapping bands on absorption and emission spectra confirm the formation of inclusion complex.
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Badi, S., Madi, F., Nouar, L. et al. Effect of cyclodextrins inclusion complexes into absorption and emission spectra of P-methylaminobenzoate derivatives: A DFT and TD-DFT investigation. J Fluoresc 33, 1457–1467 (2023). https://doi.org/10.1007/s10895-023-03146-x
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DOI: https://doi.org/10.1007/s10895-023-03146-x