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Tisovský P, Donovalová J, Kožíšek J, Horváth M, Gáplovský A. Reversible ON/OFF and OFF/ON, light-stimulated binding, or release processes of metal cations from isatin diarylhydrazone complexes in solution. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.113827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Tisovský P, Donovalová J, Sokolík R, Horváth M, Gáplovský A. A New Strategy for the Preparation of E Isomers of Hydrazones and Anil‐Like Compounds: Thermally Stimulated Isomerization of Z Isomers of Anions. ChemistrySelect 2021. [DOI: 10.1002/slct.202102290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Pavol Tisovský
- Department of Organic Chemistry Faculty of Natural Sciences Comenius University Ilkovičova 6, SK-842 15 Bratislava Slovakia
| | - Jana Donovalová
- Department of Organic Chemistry Faculty of Natural Sciences Comenius University Ilkovičova 6, SK-842 15 Bratislava Slovakia
| | - Róbert Sokolík
- Department of Organic Chemistry Faculty of Natural Sciences Comenius University Ilkovičova 6, SK-842 15 Bratislava Slovakia
| | - Miroslav Horváth
- Department of Organic Chemistry Faculty of Natural Sciences Comenius University Ilkovičova 6, SK-842 15 Bratislava Slovakia
| | - Anton Gáplovský
- Department of Organic Chemistry Faculty of Natural Sciences Comenius University Ilkovičova 6, SK-842 15 Bratislava Slovakia
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Tisovský P, Csicsai K, Donovalová J, Šandrik R, Kožíšek J, Gáplovský A. Tautomerization of Z and E isomers of dipolar isatin bipyridylhydrazone complexes with Zn(II) ions. Photochromism - ON/OFF switching. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2020.112916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Tisovský P, Csicsai K, Donovalová J, Šandrik R, Sokolík R, Gáplovský A. Effect of a =X-NH-Fragment, (X = C, N), on Z/ E Isomerization and ON/OFF Functionality of Isatin Arylhydrazones, ((Arylamino)Methylene)Indolin-2-Ones and Their Anions. Molecules 2020; 25:E3082. [PMID: 32640761 PMCID: PMC7412119 DOI: 10.3390/molecules25133082] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 07/01/2020] [Accepted: 07/03/2020] [Indexed: 11/17/2022] Open
Abstract
The subject of this work was the study of thermally and photochemically stimulated Z « E isomerization and hydrazo « azo tautomerism of Z- and E-isomers of isatin arylhydrazones and ((arylamino)methylene)indolin-2-ones and their anions. Using NMR, UV-Vis spectroscopy, kinetic measurements, and HPLC, we studied the relationship of structure, (Z- and E-isomers), of these compounds and hydrazo=azo tautomerism. The ON/OFF functionality of these compounds and their anions using light to stimulate switching between ON and OFF states was investigated. We pointed out the characterization of the effect of =N- and =CH- structural fragments and aryl structure on ON and OFF states of isatin arylhydrazones and ((arylamino)methylene)indolin-2-ones.
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Affiliation(s)
- Pavol Tisovský
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Ilkovičova 6, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia; (K.C.); (J.D.); (R.Š.); (R.S.); (A.G.)
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Filo J, Tisovský P, Csicsai K, Donovalová J, Gáplovský M, Gáplovský A, Cigáň M. Tautomeric photoswitches: anion-assisted azo/azine-to-hydrazone photochromism. RSC Adv 2019; 9:15910-15916. [PMID: 35521389 PMCID: PMC9064339 DOI: 10.1039/c9ra02906k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 05/15/2019] [Indexed: 11/21/2022] Open
Abstract
The photoswitching behaviour of isatin 4-nitrophenylhydrazones in presence of anions was investigated.
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Affiliation(s)
- Juraj Filo
- Institute of Chemistry
- Faculty of Natural Sciences
- Comenius University
- SK-842 15 Bratislava
- Slovakia
| | - Pavol Tisovský
- Institute of Chemistry
- Faculty of Natural Sciences
- Comenius University
- SK-842 15 Bratislava
- Slovakia
| | - Klaudia Csicsai
- Institute of Chemistry
- Faculty of Natural Sciences
- Comenius University
- SK-842 15 Bratislava
- Slovakia
| | - Jana Donovalová
- Institute of Chemistry
- Faculty of Natural Sciences
- Comenius University
- SK-842 15 Bratislava
- Slovakia
| | - Martin Gáplovský
- Department of Pharmaceutical Chemistry
- Faculty of Pharmacy
- Comenius University
- SK-832 32 Bratislava
- Slovakia
| | - Anton Gáplovský
- Institute of Chemistry
- Faculty of Natural Sciences
- Comenius University
- SK-842 15 Bratislava
- Slovakia
| | - Marek Cigáň
- Institute of Chemistry
- Faculty of Natural Sciences
- Comenius University
- SK-842 15 Bratislava
- Slovakia
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Tisovský P, Šandrik R, Horváth M, Donovalová J, Filo J, Gáplovský M, Jakusová K, Cigáň M, Sokolík R, Gáplovský A. Effect of Structure on Charge Distribution in the Isatin Anions in Aprotic Environment: Spectral Study. Molecules 2017; 22:molecules22111961. [PMID: 29135954 PMCID: PMC6150331 DOI: 10.3390/molecules22111961] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 11/09/2017] [Indexed: 12/20/2022] Open
Abstract
Five isatin anions were prepared by deprotonation of initial isatins in aprotic solvents using basic fluoride and acetate anions (F− and CH3COO−). The F− basicity is sufficient to deprotonate isatin NH hydrogen from all the studied compounds. This process is reversible. In the presence of proton donor solvents, the anions form the corresponding isatins. The isatin hydrogen acidity depends on the overall structure of the isatin derivatives. The anions were characterized by ultraviolet–visible (UV–Vis), Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopy. Interestingly, the anions form aggregates at concentrations above 10−3 mol·dm−3. Further, the effect of cations on the UV–Vis spectra of the studied anions was studied. Charge transfer and its distribution in the anion depends on the radius and the cation electron configuration. The alkali metal cations, tetrabutylammonium (TBA+), Mg2+ and Ag+, interact with the C-2 carbonyl oxygen of the isatin anion. The interaction has a coulombic character. On the other hand, Cd2+, Zn2+, Hg2+, Co2+, and Cu+ cations form a coordinate bond with the isatin nitrogen.
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Affiliation(s)
- Pavol Tisovský
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Ilkovičova 6, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Róbert Šandrik
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Ilkovičova 6, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Miroslav Horváth
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Ilkovičova 6, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Jana Donovalová
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Ilkovičova 6, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Juraj Filo
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Ilkovičova 6, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Martin Gáplovský
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Comenius University, Odbojárov 10, SK-832 32 Bratislava, Slovakia.
| | - Klaudia Jakusová
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Ilkovičova 6, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Marek Cigáň
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Ilkovičova 6, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Róbert Sokolík
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Ilkovičova 6, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Anton Gáplovský
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Ilkovičova 6, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
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Cigáň M, Horváth M, Filo J, Jakusová K, Donovalová J, Garaj V, Gáplovský A. 7-Dialkylaminocoumarin Oximates: Small Molecule Fluorescent "Turn-On" Chemosensors for Low-Level Water Content in Aprotic Organic Solvents. Molecules 2017; 22:molecules22081340. [PMID: 28805688 PMCID: PMC6152144 DOI: 10.3390/molecules22081340] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 08/09/2017] [Accepted: 08/11/2017] [Indexed: 11/22/2022] Open
Abstract
The water sensing properties of two efficient two-component fluorescent “turn-on” chemo-sensors based on the 7-dialkylaminocoumarin oxime acid-base equilibrium were investigated. Interestingly, although simple frontier orbital analysis predicts an intramolecular photoinduced electron transfer quenching pathway in conjugated oximates, TD-DFT (Time-dependent density functional theory) quantum chemical calculations support non-radiative dark S1 excited state deactivation as a fluorescence quenching mechanism. Due to the acid-base sensing mechanism and sensitive “turn-on” fluorescent response, both studied coumarin aldoxime chemosensors exhibit rapid response to low-level water content in polar aprotic solvents, with detection limits comparable to chemodosimeters or chemosensors based on interpolymer π-stacking aggregation.
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Affiliation(s)
- Marek Cigáň
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Ilkovičova 6, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Miroslav Horváth
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Ilkovičova 6, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Juraj Filo
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Ilkovičova 6, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Klaudia Jakusová
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Ilkovičova 6, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Jana Donovalová
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Ilkovičova 6, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Vladimír Garaj
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Comenius University, Odbojárov 10, SK-832 32 Bratislava, Slovakia.
| | - Anton Gáplovský
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Ilkovičova 6, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
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Cigáň M, Gašpar J, Gáplovská K, Holekšiová J, Jakusová K, Donovalová J, Garaj V, Stankovičová H. Coumarin phenylsemicarbazones: sensitive colorimetric and fluorescent “turn-on” chemosensors for low-level water content in aprotic organic solvents. NEW J CHEM 2016. [DOI: 10.1039/c6nj01639a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Highly sensitive two-component colorimetric and fluorescent “turn-on” chemosensors for water detection in aprotic organic solvents.
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Affiliation(s)
- Marek Cigáň
- Institute of Chemistry
- Faculty of Natural Sciences
- Comenius University
- SK-842 15 Bratislava
- Slovakia
| | - Jan Gašpar
- Institute of Chemistry
- Faculty of Natural Sciences
- Comenius University
- SK-842 15 Bratislava
- Slovakia
| | - Katarína Gáplovská
- Institute of Chemistry
- Faculty of Natural Sciences
- Comenius University
- SK-842 15 Bratislava
- Slovakia
| | - Jana Holekšiová
- Institute of Chemistry
- Faculty of Natural Sciences
- Comenius University
- SK-842 15 Bratislava
- Slovakia
| | - Klaudia Jakusová
- Institute of Chemistry
- Faculty of Natural Sciences
- Comenius University
- SK-842 15 Bratislava
- Slovakia
| | - Jana Donovalová
- Institute of Chemistry
- Faculty of Natural Sciences
- Comenius University
- SK-842 15 Bratislava
- Slovakia
| | - Vladimír Garaj
- Department of Pharmaceutical Chemistry
- Faculty of Pharmacy
- Comenius University
- SK-832 32 Bratislava
- Slovakia
| | - Henrieta Stankovičová
- Institute of Chemistry
- Faculty of Natural Sciences
- Comenius University
- SK-842 15 Bratislava
- Slovakia
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Cigáň M, Jakusová K, Gáplovský M, Filo J, Donovalová J, Gáplovský A. Isatin phenylhydrazones: anion enhanced photochromic behaviour. Photochem Photobiol Sci 2015; 14:2064-73. [PMID: 26412034 DOI: 10.1039/c5pp00275c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The photochemical properties of two basic easily synthesized isatin N(2)-phenylhydrazones were investigated. Contrary to the corresponding isatin N(2)-diphenylhydrazones, only Z-isomers were isolated from the reaction mixtures during the synthesis due to their stabilization by intramolecular hydrogen bonding. Although the presence of the C=N double bond creates conditions for the formation of a simple on-off photoswitch, the low photochemical quantum yield and particularly the low switching amplitude in absorbance hamper their photochromic applications. However, the addition of strongly basic anions to phenylhydrazone solutions leads to isatin NH group deprotonation and creates a new diazene T-type Vis-Vis photochromic system with sufficiently separated absorption maxima. Interestingly, although the thermally stable A-form is also photostable in ambient light, its irradiation with a stronger LED source leads to thermally unstable B-form formation which rapidly isomerizes back to the corresponding A-form. The process is reversible and switching cycles can be repeated in both directions. The important advantages of this two-component organic chromophore-inorganic anion photochromic system are its easy synthesis, easy handling due to its insensitivity to room light, easy further structural modification and reversibility. The corresponding photochemical quantum yield, however, remains relatively low (Φ ∼ 0.001). The theoretically calculated properties are in agreement with the obtained experimental results and support the proposed reaction mechanism.
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Affiliation(s)
- M Cigáň
- Faculty of Natural Sciences, Comenius University in Bratislava, Institute of Chemistry, Bratislava, Slovakia.
| | - K Jakusová
- Faculty of Natural Sciences, Comenius University in Bratislava, Institute of Chemistry, Bratislava, Slovakia.
| | - M Gáplovský
- Faculty of Pharmacy, Comenius University in Bratislava, Department of Pharmaceutical Chemistry, Bratislava, Slovakia
| | - J Filo
- Faculty of Natural Sciences, Comenius University in Bratislava, Institute of Chemistry, Bratislava, Slovakia.
| | - J Donovalová
- Faculty of Natural Sciences, Comenius University in Bratislava, Institute of Chemistry, Bratislava, Slovakia.
| | - A Gáplovský
- Faculty of Natural Sciences, Comenius University in Bratislava, Institute of Chemistry, Bratislava, Slovakia.
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Šeršeň F, Gregáň F, Peško M, Dvoranová D, Kráľová K, Matkovičová Z, Gregáň J, Donovalová J. Synthesis and Herbicidal Activity of New Hydrazide and Hydrazonoyl Derivatives. Molecules 2015; 20:14139-54. [PMID: 26248070 PMCID: PMC4759945 DOI: 10.3390/molecules200814139] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 07/30/2015] [Accepted: 07/31/2015] [Indexed: 12/03/2022] Open
Abstract
Three new hydrazide and five new hydrazonoyl derivatives were synthesized. The chemical structures of these compounds were confirmed by 1H-NMR, IR spectroscopy and elemental analysis. The prepared compounds were tested for their activity to inhibit photosynthetic electron transport in spinach chloroplasts and growth of the green algae Chlorella vulgaris. IC50 values of these compounds varied in wide range, from a strong to no inhibitory effect. EPR spectroscopy showed that the active compounds interfered with intermediates Z•/D•, which are localized on the donor side of photosystem II. Fluorescence spectroscopy suggested that the mechanism of inhibitory action of the prepared compounds possibly involves interactions with aromatic amino acids present in photosynthetic proteins.
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Affiliation(s)
- František Šeršeň
- Institute of Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Bratislava 842 15, Slovakia.
| | - Fridrich Gregáň
- Department of Chemistry, Faculty of Natural Sciences, Matej Bell University, Tajovského 40, Banská Bystrica 974 01, Slovakia.
| | - Matúš Peško
- Department of Environmental Ecology, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Bratislava 842 15, Slovakia.
| | - Dana Dvoranová
- Institute of Physical Chemistry and Chemical Physics, Faculty Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, Bratislava 812 37, Slovakia.
| | - Katarína Kráľová
- Institute of Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Bratislava 842 15, Slovakia.
| | - Zuzana Matkovičová
- Institute of Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Bratislava 842 15, Slovakia.
| | - Juraj Gregáň
- Department of Genetics, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Bratislava 842 15, Slovakia.
- Department of Chromosome Biology, MFPL, University of Vienna, Dr. Bohr-Gasse 7, Vienna 1030, Austria.
| | - Jana Donovalová
- Institute of Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Bratislava 842 15, Slovakia.
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11
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Cigáň M, Jakusová K, Donovalová J, Filo J, Horváth M, Gáplovský A. Fluorescence of isatinN-phenylsemicarbazones: aggregation and hydrazide-hydrazonol tautomerism. J PHYS ORG CHEM 2015. [DOI: 10.1002/poc.3415] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Marek Cigáň
- Institute of Chemistry, Faculty of Natural Sciences; Comenius University; Mlynská dolina CH-2 SK-842 15 Bratislava Slovakia
| | - Klaudia Jakusová
- Institute of Chemistry, Faculty of Natural Sciences; Comenius University; Mlynská dolina CH-2 SK-842 15 Bratislava Slovakia
| | - Jana Donovalová
- Institute of Chemistry, Faculty of Natural Sciences; Comenius University; Mlynská dolina CH-2 SK-842 15 Bratislava Slovakia
| | - Juraj Filo
- Institute of Chemistry, Faculty of Natural Sciences; Comenius University; Mlynská dolina CH-2 SK-842 15 Bratislava Slovakia
| | - Miroslav Horváth
- Institute of Chemistry, Faculty of Natural Sciences; Comenius University; Mlynská dolina CH-2 SK-842 15 Bratislava Slovakia
| | - Anton Gáplovský
- Institute of Chemistry, Faculty of Natural Sciences; Comenius University; Mlynská dolina CH-2 SK-842 15 Bratislava Slovakia
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12
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Cigáň M, Gáplovský M, Jakusová K, Donovalová J, Horváth M, Filo J, Gáplovský A. Isatin N2-diphenylhydrazones: new easily synthesized Vis-Vis molecular photoswitches. RSC Adv 2015. [DOI: 10.1039/c5ra06625e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An easily synthesized new type of Vis-Vis molecular switches based on hydrazone CN bond photoisomerization and isatin NH group deprotonation.
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Affiliation(s)
- M. Cigáň
- Faculty of Natural Sciences
- Institute of Chemistry
- Comenius University
- SK-842 15 Bratislava
- Slovakia
| | - M. Gáplovský
- Faculty of Natural Sciences
- Institute of Chemistry
- Comenius University
- SK-842 15 Bratislava
- Slovakia
| | - K. Jakusová
- Faculty of Natural Sciences
- Institute of Chemistry
- Comenius University
- SK-842 15 Bratislava
- Slovakia
| | - J. Donovalová
- Faculty of Natural Sciences
- Institute of Chemistry
- Comenius University
- SK-842 15 Bratislava
- Slovakia
| | - M. Horváth
- Faculty of Natural Sciences
- Institute of Chemistry
- Comenius University
- SK-842 15 Bratislava
- Slovakia
| | - J. Filo
- Faculty of Natural Sciences
- Institute of Chemistry
- Comenius University
- SK-842 15 Bratislava
- Slovakia
| | - A. Gáplovský
- Faculty of Natural Sciences
- Institute of Chemistry
- Comenius University
- SK-842 15 Bratislava
- Slovakia
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13
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Cigáň M, Jakusová K, Donovalová J, Szöcs V, Gáplovský A. Isatin N-phenylsemicarbazone: effect of substituents and concentration on anion sensing selectivity and sensitivity. RSC Adv 2014. [DOI: 10.1039/c4ra04847d] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Cigáň M, Danko M, Donovalová J, Gašpar J, Stankovičová H, Gáplovský A, Hrdlovič P. 3-(7-Dimethylamino)coumarin N-phenylsemicarbazones in solution and polymer matrices: Tuning their fluorescence via para-phenyl substitution. Spectrochim Acta A Mol Biomol Spectrosc 2014; 126:36-45. [PMID: 24577278 DOI: 10.1016/j.saa.2014.01.127] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 01/20/2014] [Accepted: 01/26/2014] [Indexed: 06/03/2023]
Abstract
The photo-physical properties of five new para-phenyl substituted derivatives of 3-(7-dimethylamino)coumarin N-phenylsemicarbazone with various electron-withdrawing substituents R (RF, Br, CF3, CN or NO2) in the para-position on the phenyl ring were investigated in solvents and in polymer matrices. Tuning their fluorescent properties via para-substitution is discussed in terms of Twisted Intra-molecular Charge-Transfer (TICT) state formation, specific solute-solvent interactions (hydrogen bonding), fluorescent H-aggregates formation, and the solvent polarity and polymer matrix effects.
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Affiliation(s)
- Marek Cigáň
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Martin Danko
- Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia.
| | - Jana Donovalová
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Jan Gašpar
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Henrieta Stankovičová
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia
| | - Anton Gáplovský
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Pavol Hrdlovič
- Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia.
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Jakusová K, Donovalová J, Cigáň M, Gáplovský M, Garaj V, Gáplovský A. Isatinphenylsemicarbazones as efficient colorimetric sensors for fluoride and acetate anions - anions induce tautomerism. Spectrochim Acta A Mol Biomol Spectrosc 2014; 123:421-429. [PMID: 24418689 DOI: 10.1016/j.saa.2013.12.073] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Revised: 12/06/2013] [Accepted: 12/15/2013] [Indexed: 06/03/2023]
Abstract
The anion induced tautomerism of isatin-3-4-phenyl(semicarbazone) derivatives is studied herein. The interaction of F(-), AcO(-), H2PO4(-), Br(-) or HSO4(-) anions with E and Z isomers of isatin-3-4-phenyl(semicarbazone) and N-methylisatin-3-4-phenyl(semicarbazone) as sensors influences the tautomeric equilibrium of these sensors in the liquid phase. This tautomeric equilibrium is affected by (1) the inter- and intra-molecular interactions' modulation of isatinphenylsemicarbazone molecules due to the anion induced change in the solvation shell of receptor molecules and (2) the sensor-anion interaction with the urea hydrogens. The acid-base properties of anions and the difference in sensor structure influence the equilibrium ratio of the individual tautomeric forms. Here, the tautomeric equilibrium changes were indicated by "naked-eye" experiment, UV-VIS spectral and (1)H NMR titration, resulting in confirmation that appropriate selection of experimental conditions leads to a high degree of sensor selectivity for some investigated anions. Sensors' E and Z isomers differ in sensitivity, selectivity and sensing mechanism. Detection of F(-) or CH3COO(-) anions at high weakly basic anions' excess is possible.
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Affiliation(s)
- Klaudia Jakusová
- Institute of Chemistry, Faculty of Natural Sciences, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia
| | - Jana Donovalová
- Institute of Chemistry, Faculty of Natural Sciences, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia
| | - Marek Cigáň
- Institute of Chemistry, Faculty of Natural Sciences, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia.
| | - Martin Gáplovský
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Comenius University, Odbojárov 10, SK-832 32 Bratislava, Slovakia
| | - Vladimír Garaj
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Comenius University, Odbojárov 10, SK-832 32 Bratislava, Slovakia
| | - Anton Gáplovský
- Institute of Chemistry, Faculty of Natural Sciences, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia
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Jakusová K, Donovalová J, Gáplovský M, Cigáň M, Stankovičová H, Gáplovský A. Self-association, tautomerism and E-Z
isomerization of isatin-phenylsemicarbazones - spectral study and theoretical calculations. J PHYS ORG CHEM 2013. [DOI: 10.1002/poc.3164] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Klaudia Jakusová
- Institute of Chemistry, Faculty of Natural Sciences; Comenius University; Mlynská dolina CH-2, SK-842 15 Bratislava Slovakia
| | - Jana Donovalová
- Institute of Chemistry, Faculty of Natural Sciences; Comenius University; Mlynská dolina CH-2, SK-842 15 Bratislava Slovakia
| | - Martin Gáplovský
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy; Comenius University; Kalinčiakova 8, SK-832 32 Bratislav Slovakia
| | - Marek Cigáň
- Institute of Chemistry, Faculty of Natural Sciences; Comenius University; Mlynská dolina CH-2, SK-842 15 Bratislava Slovakia
| | - Henrieta Stankovičová
- Institute of Chemistry, Faculty of Natural Sciences; Comenius University; Mlynská dolina CH-2, SK-842 15 Bratislava Slovakia
| | - Anton Gáplovský
- Institute of Chemistry, Faculty of Natural Sciences; Comenius University; Mlynská dolina CH-2, SK-842 15 Bratislava Slovakia
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Cigáň M, Donovalová J, Szöcs V, Gašpar J, Jakusová K, Gáplovský A. 7-(Dimethylamino)coumarin-3-carbaldehyde and its phenylsemicarbazone: TICT excited state modulation, fluorescent H-aggregates, and preferential solvation. J Phys Chem A 2013; 117:4870-83. [PMID: 23697644 DOI: 10.1021/jp402627a] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The photophysical properties of 7-(dimethylamino)coumarin-3-carbaldehyde 3 and its phenylsemicarbazone 4 were investigated in solvents of various polarity and in differing solvent mixtures. The different fluorescent quantum yield (ΦF) behavior of 3 and 4 in highly polar solvents is discussed in terms of Twisted Intramolecular Charge-Tranfer (TICT) state formation and the specific solute-solvent interactions. Because of the weak intermolecular hydrogen bonding ability of both the radiative ICT and nonradiative TICT excited state of 3 and the linear steep decrease in ΦF from a medium to high polarity region, coumarin 3 could be a useful polarity probe for microenvironments containing hydrogen bonding groups. Compared to 3, coumarin 4 exhibits the highest ΦF values in highly polar solvents with strong hydrogen bond acceptor ability. The high quantum yield of fluorescence in DMSO, DMF, and alcohols qualifies coumarin 4 as a laser dye in the given medium, with kF higher than k(nr). Contrary to previous reports that many H-aggregates are nonfluorescent in nature, coumarin 3 forms highly fluorescent H-aggregates in MeOH and EtOH. On the basis of the restrictions of the Kasha-exciton theory model, we assume that the formation of fluorescent H-dimer aggregates of 3 is driven by π(+)-π(-) interactions. To the best of our knowledge, this is the first report on aggregation of coumarin dye in alcoholic solutions. In addition, restrictions in the fitting procedure relating to determination of the solvation number, n, using the Covington-Newman model of preferential solvation and also the solvent nonideality parameter, h', are discussed in this article.
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Affiliation(s)
- Marek Cigáň
- Institute of Chemistry, Faculty of Natural Sciences, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovak Republic.
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Donovalová J, Cigáň M, Stankovičová H, Gašpar J, Danko M, Gáplovský A, Hrdlovič P. Spectral properties of substituted coumarins in solution and polymer matrices. Molecules 2012; 17:3259-76. [PMID: 22418928 PMCID: PMC6268095 DOI: 10.3390/molecules17033259] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Revised: 03/07/2012] [Accepted: 03/08/2012] [Indexed: 11/26/2022] Open
Abstract
The absorption and fluorescence spectra of substituted coumarins (2-oxo-2H-chromenes) were investigated in solvents and in polymer matrices. The substitutions involved were: (1) by groups with varying electron donating ability such as CH3, OCH3 and N(CH3)2, mainly, but not exclusively, in positions 7 and (2), by either CHO or 4-PhNHCONHN=CH- in position 3. While the spectra of non-substituted coumarin-3-carbaldehyde has absorptions at approximately 305 and 350 nm, substitution at position 7 leads to remarkable changes in the shape of the absorption spectrum and shifts the absorption to a longer wavelength. Similarly, the replacement of the formyl group with a semicarbazide group substantially influences the shape of the absorption spectrum, and coumarins which have only N(CH3)2 in position 7 experience small changes. These changes are associated with the increasing intramolecular charge transfer (ICT) character and increasing conjugation length of the chromophoric system, respectively, in the studied molecules. The fluorescence is almost negligible for derivatives which have H in this position. With increasing electron donating ability, and the possibility of a positive mesomeric (+M) effect of the substituent in position 7 of the coumarin moiety, the fluorescence increases, and this increase is most intense when N(CH3)2 substitutes in this position, for both 3-substituted derivatives. Spectral measurements of the studied coumarins in polymer matrices revealed that the absorption and fluorescence maxima lay within the maxima for solvents, and that coumarins yield more intense fluorescence in polymer matrices than when they are in solution. The quantum yield of derivatives which have a dimethylamino group in position 7 in polymer matrices approaches 1, and the fluorescence lifetime is within the range of 0.5–4 ns. The high quantum yield of 7-dimethylamino derivatives qualifies them as laser dyes which have kF higher than knr in the given medium. This is caused by stiffening of the coumarin structure in polar polymer matrices, such as PMMA and PVC, due to higher micro-viscosity than in solution and intermolecular dipole-dipole interaction between chromophore (dopant) and matrix.
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Affiliation(s)
- Jana Donovalová
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovak Republic; (M.C.); (H.S.); (J.G.); (A.G.); (P.H.)
- Author to whom correspondence should be addressed; ; Tel.: +421-2-6029-6306; Fax: +421-2-6029-6337
| | - Marek Cigáň
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovak Republic; (M.C.); (H.S.); (J.G.); (A.G.); (P.H.)
| | - Henrieta Stankovičová
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovak Republic; (M.C.); (H.S.); (J.G.); (A.G.); (P.H.)
| | - Jan Gašpar
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovak Republic; (M.C.); (H.S.); (J.G.); (A.G.); (P.H.)
| | - Martin Danko
- Polymer Institute, Slovak Academy of Sciences, 845 41 Bratislava, Dúbravská cesta 9, Slovak Republic;
| | - Anton Gáplovský
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovak Republic; (M.C.); (H.S.); (J.G.); (A.G.); (P.H.)
| | - Pavol Hrdlovič
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovak Republic; (M.C.); (H.S.); (J.G.); (A.G.); (P.H.)
- Polymer Institute, Slovak Academy of Sciences, 845 41 Bratislava, Dúbravská cesta 9, Slovak Republic;
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Flasík R, Stankovicová H, Gáplovský A, Donovalová J. Synthesis and study of novel coumarin derivatives potentially utilizable as memory media. Molecules 2009; 14:4838-48. [PMID: 20032862 PMCID: PMC6255089 DOI: 10.3390/molecules14124838] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2009] [Revised: 11/17/2009] [Accepted: 11/23/2009] [Indexed: 11/16/2022] Open
Abstract
Novel coumarin derivatives, 2-oxo-2H-chromenecarbaldehyde hydrazones were prepared by reaction of substituted 2-oxo-2H-chromenecarbaldehydes with N-aminoimides in ethanol in the presence of 4-toluenesulfonic acid as catalyst. The photochromic and thermochromic properties of the prepared compounds were investigated.
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Affiliation(s)
- Radoslav Flasík
- Institute of Chemistry, Faculty of Natural Sciences, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovak Republic.
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Gáplovský A, Toma Š, Donovalová J. Reactors for simultaneous application of UV light and ultrasound on the reaction mixture and their modifications for kinetic studies. J Photochem Photobiol A Chem 2007. [DOI: 10.1016/j.jphotochem.2007.04.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Gáplovský A, Donovalová J, Magdolen P, Toma S, Zahradník P. Spectroscopic study of 2-[2-(4-cyclaminophenyl)ethen-1-yl] benzothiazoles and their N-allylbenzothiazolium bromides. Solvent and substituent effects on their ultraviolet-visible and fluorescence spectra. Spectrochim Acta A Mol Biomol Spectrosc 2002; 58:363-371. [PMID: 11808740 DOI: 10.1016/s1386-1425(01)00545-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
UV-vis and fluorescence spectra of 2-[2-(4-cyclaminophenyl)ethen-1-yl] benzothiazoles 1 and their N-allylbenzothiazolium bromides 2 have been measured and interpreted. The substitution and solvent effects on electronic structure and spectra have been investigated. The benzothiazolium salts substituted with saturated cyclamines show strong push-pull character and can be used as potential NLO materials. Formation of aggregated structures was observed at higher concentrations of the benzothiazolium bromides.
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Affiliation(s)
- Anton Gáplovský
- Institute of Chemistry, Faculty of Natural Sciences, Comenius University, Bratislava, Slovak Republic.
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Gáplovský A, Donovalová J, Lacová M, Mračnová R, El-Shaaer HM. The photochemical behaviour of 6-X-4H-3(bicyclo[2.2.1]-5-heptene-2,3-dicarboximidoiminomethyl)-4-chromones. J Photochem Photobiol A Chem 2000. [DOI: 10.1016/s1010-6030(00)00319-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Gáplovský A, Donovalová J, Toma Š, Kubinec R. Ultrasound effects on photochemical reactions 2. A study of ultrasound effects on some monomolecular and bimolecular photochemical reactions. J Photochem Photobiol A Chem 1998. [DOI: 10.1016/s1010-6030(98)00237-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Gáplovský A, Donovalová J, Toma S, Kubinec R. Ultrasound effects on photochemical reactions, part 1: photochemical reactions of ketones with alkenes. Ultrason Sonochem 1997; 4:109-115. [PMID: 11237024 DOI: 10.1016/s1350-4177(97)00004-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Ultrasound considerably enhances and simplifies photochemical reaction of cyclohexanone with cyclohexene. The Paterno-Büchi reaction of acetone with ethyl vinyl ether is enhanced by ultrasound and yields a different ratio of cis/trans oxetanes under sonication by comparison with the silent reaction. Sonication appears to affect the first reaction by homogenization of excited intermediates and by quenching the excited triplet state at the second reaction.
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Affiliation(s)
- A Gáplovský
- Institute of Chemistry, Faculty of Natural Sciences, Comenius University, Bratislava, Slovakia
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Gáplovský A, Hrdlovič P, Donovalová J, Hrnčiar P. Influence of the solvent on the emission of 3-(N,N-dimethylamino)-2H-1-benzopyran-2-one. J Photochem Photobiol A Chem 1991. [DOI: 10.1016/1010-6030(91)87010-s] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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