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Faillace MS, Dolgopolova EA, Ceballos NM, Ruiz Pereyra EN, Lanfri L, Argüello GA, Burgos Paci M, Shustova NB, Peláez WJ. GFP-related chromophores: photoisomerization, thermal reversion, and DNA labelling. Phys Chem Chem Phys 2023. [PMID: 37376968 DOI: 10.1039/d3cp01655b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Due to the pronounced effect of the confined environment on the photochemical properties of 4-hydroxybenzylidene imidazolinone (HBI), a GFP-related chromophore, imidazolidinone and imidazothiazolone analogues have been studied as fluorescent probes. Their photoisomerization and their thermal reversion were studied under 365-nm-irradiation, resulting in observation of an enthalpy-entropy compensation effect. Theoretical studies were carried out to shed light on the thermal reversion mechanism. Moreover, photophysical studies of benzylidene imidazothiazolone in the presence of dsDNA revealed fluorescence enhancement. The prepared compounds could be considered as a valuable tool for the detailed investigation of physicochemical, biochemical, or biological systems.
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Affiliation(s)
- Martin S Faillace
- INFIQC-CONICET-Dpto. de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, X5000HUA, Argentina.
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
| | - Ekaterina A Dolgopolova
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
| | - Noelia M Ceballos
- INFIQC-CONICET-Dpto. de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, X5000HUA, Argentina.
| | - E Nahir Ruiz Pereyra
- INFIQC-CONICET-Dpto. de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, X5000HUA, Argentina.
| | - Lucia Lanfri
- INFIQC-CONICET-Dpto. de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, X5000HUA, Argentina.
| | - Gustavo A Argüello
- INFIQC-CONICET-Dpto. de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, X5000HUA, Argentina.
| | - Maximiliano Burgos Paci
- INFIQC-CONICET-Dpto. de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, X5000HUA, Argentina.
| | - Natalia B Shustova
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
| | - Walter J Peláez
- INFIQC-CONICET-Dpto. de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, X5000HUA, Argentina.
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Hricovíni M, Asher JR, Hricovíni M. Intramolecular crankshaft-type rearrangement in a photoisomerised glycoconjugate †. RSC Adv 2023; 13:9413-9417. [PMID: 36968057 PMCID: PMC10034262 DOI: 10.1039/d3ra01678a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 03/16/2023] [Indexed: 03/24/2023] Open
Abstract
High-resolution NMR spectroscopy revealed that a novel glycoconjugate, consisting of two β-glucopyranoses attached to a quinazolinone-like structure, exhibited photoisomerization around the –N–N
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and CH–C– bonds of the –N–NCH–C– linkage in the same timeframe (the so-called “crankshaft rotation”) upon exposure to UV light. Experimental NMR data combined with DFT calculations discovered that the attachment of carbohydrate residues to photoactive compounds significantly changed the isomerization process and intramolecular rearrangement compared to the unglycosylated system, while the overall molecular structure remained virtually unchanged. A reversible photoinduced intramolecular crankshaft-type rearrangement in a glycoconjugate proceeds simultaneously at both the –N–N and CH–C– bonds.![]()
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Affiliation(s)
- Michal Hricovíni
- Institute of Chemistry, Slovak Academy of SciencesDúbravská cesta 9845 38 BratislavaSlovak Republic
| | - James R. Asher
- Institute of Inorganic Chemistry, Slovak Academy of SciencesDúbravská cesta 9845 36 BratislavaSlovak Republic
- Faculty of Natural Sciences, Department of Inorganic Chemistry, Comenius UniversityMlynská Dolina, CH284215BratislavaSlovak Republic
| | - Miloš Hricovíni
- Institute of Chemistry, Slovak Academy of SciencesDúbravská cesta 9845 38 BratislavaSlovak Republic+421-2-5941-0222+421-2-5941-0323
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Hricovíni M, Asher JR, Hricovíni M. A study of the photochemical behaviour and relaxation mechanisms of anti– syn isomerisation around quinazolinone –N–N bonds. RSC Adv 2022; 12:27442-27452. [DOI: 10.1039/d2ra04529j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 09/17/2022] [Indexed: 11/21/2022] Open
Abstract
High-resolution NMR experiments revealed that differently substituted quinazolinone-based Schiff bases undergo anti to syn isomerisation on exposure to ultraviolet light in DMSO solution.
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Affiliation(s)
- Michal Hricovíni
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovak Republic
| | - James R. Asher
- Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 36 Bratislava, Slovak Republic
- Faculty of Natural Sciences, Department of Inorganic Chemistry, Comenius University, Mlynská Dolina, CH2, 84215, Bratislava, Slovak Republic
| | - Miloš Hricovíni
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovak Republic
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Liu YH, Peng YJ, Su H, Zhu C, Lin SH. The absorption and fluorescence spectra of 4-(3-methoxybenzylidene)-2-methyl-oxazalone interpreted by Franck-Condon simulation in various pH solvent environments. Phys Chem Chem Phys 2020; 22:17559-17566. [PMID: 32716426 DOI: 10.1039/d0cp01980a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The absorption and fluorescence spectra of 4-(3-methoxybenzylidene)-2-methyl-oxazalone (m-MeOBDI) dissolved in neutral, acidic, and basic solvent environments have been investigated and assigned by using Franck-Condon (FC) simulations at the quantum TDDFT level. Four different structures of m-MeOBDI in the ground and excited states are optimized and are found to be responsible for the observed absorption and fluorescence spectra. The (absorption) fluorescence of m-MeOBDI in pure methanol and neutral/basic methanol/water (1/9 vol) mixed solvent is found to arise from the (ground neutral N-I) excited neutral N-I* and cationic C-III* species, respectively. In acidic solvent, the absorption is found to arise from ground acidic C-II species, and the excited divalent cation DC-IV* is found to be formed in its excited state due to the excess H+ in the solution, and then it emits ∼560 nm fluorescence. FC simulations have also been employed to confirm our assignments as well as interpret the vibronic band profiles. As expected, the simulated emission spectrum of the divalent cationic species is in good agreement with the experimental observation. Therefore, within the present FC simulation, the observed absorption and fluorescence spectra have been reasonably interpreted and novel fluorescence mechanisms of m-MeOBDI in various pH solvent environments have been proposed.
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Affiliation(s)
- Yu-Hui Liu
- College of Mathematics and Physics, Bohai University, Jinzhou 121013, China.
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Faillace MS, Silva AP, Alves Borges Leal AL, Muratori da Costa L, Barreto HM, Peláez WJ. Sulfated and Oxygenated Imidazoline Derivatives: Synthesis, Antioxidant Activity and Light‐Mediated Antibacterial Activity. ChemMedChem 2020; 15:851-861. [DOI: 10.1002/cmdc.202000048] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 03/02/2020] [Indexed: 11/07/2022]
Affiliation(s)
- Martín S. Faillace
- Departamento de Físicoquímica, Facultad de Ciencias QuímicasUniversidad Nacional de Córdoba, CONICET-INFIQC Haya de la Torre s/n Córdoba X5000 HUA Argentina
| | - Ana P. Silva
- Federal University of Piaui, Pharmacy CourseCampus University Professor Petrônio Portella Ininga Neighborhood Teresina, Piaui 64049-901 Brazil
| | - Antonio L. Alves Borges Leal
- Federal University of Piaui, Laboratory of Research in MicrobiologyCampus University Professor Petrônio Portella Ininga Neighborhood Teresina, Piaui 64049-901 Brazil
| | - Luciana Muratori da Costa
- Federal University of Piaui, Laboratory of Research in MicrobiologyCampus University Professor Petrônio Portella Ininga Neighborhood Teresina, Piaui 64049-901 Brazil
| | - Humberto M. Barreto
- Federal University of Piaui, Laboratory of Research in MicrobiologyCampus University Professor Petrônio Portella Ininga Neighborhood Teresina, Piaui 64049-901 Brazil
| | - Walter J. Peláez
- Departamento de Físicoquímica, Facultad de Ciencias QuímicasUniversidad Nacional de Córdoba, CONICET-INFIQC Haya de la Torre s/n Córdoba X5000 HUA Argentina
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Hricovíni M, Asher J, Hricovíni M. Photochemical anti- syn isomerization around the -N-N[double bond, length as m-dash] bond in heterocyclic imines. RSC Adv 2020; 10:5540-5550. [PMID: 35497446 PMCID: PMC9049245 DOI: 10.1039/c9ra10730d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 01/28/2020] [Indexed: 11/21/2022] Open
Abstract
EPR and NMR experiments on a quinazolinone-based Schiff's base in DMSO solution showed that irradiation with UV light (365 nm) leads to photochemically-induced isomerization from the anti- to the higher-energy syn-form around the -N-N[double bond, length as m-dash] linkage. The anti- to syn-isomerization was relatively fast, and the maximum amount of conversion detected (25%) was reached within 10 min; thermodynamic equilibrium re-established itself in about 15 min. DFT calculations were performed on the investigated compound and small model systems, and reproduced the experimental fact of the anti-conformer being lower in energy than the syn. Theoretical analysis of excited states, including visualisation of natural transition orbitals, identified possible pathways for syn-anti isomerisation, although the details vary with π-system size, making the use of small models of limited utility. The investigated compound probably isomerises through the third singlet excited state (S3), a π-π* excitation, relaxing through S2, also a π-π* state.
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Affiliation(s)
- Michal Hricovíni
- Institute of Chemistry, Slovak Academy of Sciences Dúbravská cesta 9 845 38 Bratislava Slovak Republic
| | - James Asher
- Institute of Inorganic Chemistry, Slovak Academy of Sciences Dúbravská cesta 9 845 36 Bratislava Slovak Republic
| | - Miloš Hricovíni
- Institute of Chemistry, Slovak Academy of Sciences Dúbravská cesta 9 845 38 Bratislava Slovak Republic +421-2-5940222 +421-2-59410323
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