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Tang L, Li P, Han Y, Yang G, Xin H, Zhao S, Guan R, Liu Z, Cao D. A fluorescein-based fluorescent probe for real-time monitoring hypochlorite. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Kaya S, Aydın HG, Keskin S, Ekmekci Z, Menges N. Exploring of indole derivatives for ESIPT emission: A new ESIPT-based fluorescence skeleton and TD-DFT calculations. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113487] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Kumari M, Sharma M, Rani S, Bagchi D, Bera A, Mukherjee D, Pal SK, Mozumdar S. Solvent dependent photophysical study of stable and medicinally active diketone modified pyrazole derivatives of curcumin: A spectroscopic study. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Czernel G, Budziak I, Oniszczuk A, Karcz D, Pustuła K, Górecki A, Matwijczuk A, Gładyszewska B, Gagoś M, Niewiadomy A, Matwijczuk A. ESIPT-Related Origin of Dual Fluorescence in the Selected Model 1,3,4-Thiadiazole Derivatives. Molecules 2020; 25:molecules25184168. [PMID: 32933032 PMCID: PMC7570705 DOI: 10.3390/molecules25184168] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/08/2020] [Accepted: 09/09/2020] [Indexed: 11/16/2022] Open
Abstract
In our previous work, we discussed the emergence of the dual fluorescence phenomenon in selected compounds from the group of 1,3,4-thiadiazoles. The results obtained in a number of experimental studies, supported by [TD]DFT calculations, clearly indicated that the phenomenon of dual fluorescence stemmed from an overlap of several factors, including the correct conformation of the analyzed molecule and, very significantly in this context, aggregation effects. Where those two conditions were met, we could observe the phenomenon of intermolecular charge transfer (CT) and the emergence of electronic states responsible for long wave emissions. However, in light of the new studies presented in this paper, we were able, for the first time, to provide a specific theory for the effect of dual fluorescence observed in the analyzed group of 1,3,4-thiadiazoles. We present the results of spectroscopic measurements conducted for two selected analogues from the 1,3,4-thiadiazole group, both in polar and non-polar solvents, which clearly evidence (as we have already suspected in the past, albeit have not shown in publications to date) the possibility of processes related to emission from the tautomer formed in the process of excited state intramolecular proton transfer, which is responsible for the long-wavelength emissions observed in the selected analogues. The presented results obtained with the use of UV-Vis, fluorescence (stationary and time-resolved), FTIR, and Raman spectroscopy, as well as from calculations of dipole moment changes between the ground and excited state with the use of two derivatives with different structures of the resorcylic system, corroborated our standing hypothesis. At the same time, they excluded the presence of ground state keto forms of the analyzed analogues unless necessitated by the structure of the molecule itself. In this case, aggregation factors enhance the observed effects related to the dual fluorescence of the analyzed compounds (by way of AIE-aggregated induced emissions).
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Affiliation(s)
- Grzegorz Czernel
- Department of Biophysics, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland; (G.C.); (A.M.); (B.G.)
| | - Iwona Budziak
- Department of Chemistry, University of Life Sciences in Lublin, Akademicka 15, 20-950 Lublin, Poland;
| | - Anna Oniszczuk
- Department of Inorganic Chemistry, Medical University in Lublin, 20-059 Lublin, Poland
- Correspondence: (A.O.); (D.K.); (A.M.); Tel.: +48-814-456-937 (A.M.); Fax: +48-814-456-684 (A.M.)
| | - Dariusz Karcz
- Department of Analytical Chemistry (C1), Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland
- Correspondence: (A.O.); (D.K.); (A.M.); Tel.: +48-814-456-937 (A.M.); Fax: +48-814-456-684 (A.M.)
| | - Katarzyna Pustuła
- Department of Theoretical Chemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland;
| | - Andrzej Górecki
- Department of Physical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology of the Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland;
| | - Alicja Matwijczuk
- Department of Biophysics, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland; (G.C.); (A.M.); (B.G.)
| | - Bożena Gładyszewska
- Department of Biophysics, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland; (G.C.); (A.M.); (B.G.)
| | - Mariusz Gagoś
- Department of Cell Biology, Institute of Biology and Biochemistry, Maria Curie-Skłodowska University, Akademicka 19, 20-033 Lublin, Poland;
| | - Andrzej Niewiadomy
- Institute of Industrial Organic Chemistry, Annopol 6, 03-236 Warsaw, Poland;
| | - Arkadiusz Matwijczuk
- Department of Biophysics, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland; (G.C.); (A.M.); (B.G.)
- Correspondence: (A.O.); (D.K.); (A.M.); Tel.: +48-814-456-937 (A.M.); Fax: +48-814-456-684 (A.M.)
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