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Morozova OB, Sherin PS, Yurkovskaya AV. Competition of singlet and triplet recombination of radical pairs in photoreactions of carboxy benzophenones and aromatic amino acids. Phys Chem Chem Phys 2019; 21:2017-2028. [PMID: 30633277 DOI: 10.1039/c8cp06760k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Time-resolved chemically induced dynamic nuclear polarization (CIDNP) and transient absorption (TA) were applied to reveal the branching ratio of the singlet and triplet recombination channels in the reaction of short-lived radicals of carboxy benzophenones and the aromatic amino acids histidine, tryptophan, and tyrosine in neutral aqueous solution. It was established that the share of triplet recombination increases with increasing number of carboxylic groups: no triplet recombination was found for 4-carboxy benzophenone, whereas ∼13% of radicals of 4,4'-dicarboxy benzophenone (DCBP) and ∼27% of radicals of 3,3',4,4'-tetracarboxy benzophenone (TCBP) react with histidine radicals from the triplet state of radical pairs. The main idea is that the protonated (π,π*) triplet state of TCBP or DCBP is populated via back electron transfer from the ketyl radical of TCBP or DCBP to the radical of the amino acid. The protonated triplet state of the ketone decays with the formation of a metastable hydroxylated product, which is detected by TA. Taking into account triplet recombination provides excellent coincidence between experimental data and the simulated CIDNP kinetics.
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Affiliation(s)
- Olga B Morozova
- International Tomography Center, Institutskaya 3a, 630090 Novosibirsk, Russia.
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Sosnovsky DV, Morozova OB, Yurkovskaya AV, Ivanov KL. Relation between CIDNP formed upon geminate and bulk recombination of radical pairs. J Chem Phys 2017; 147:024303. [DOI: 10.1063/1.4986243] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Denis V. Sosnovsky
- International Tomography Center, Siberian Branch of the Russian Academy of Science, Novosibirsk 630090, Russia and Novosibirsk State University, Novosibirsk 630090, Russia
| | - Olga B. Morozova
- International Tomography Center, Siberian Branch of the Russian Academy of Science, Novosibirsk 630090, Russia and Novosibirsk State University, Novosibirsk 630090, Russia
| | - Alexandra V. Yurkovskaya
- International Tomography Center, Siberian Branch of the Russian Academy of Science, Novosibirsk 630090, Russia and Novosibirsk State University, Novosibirsk 630090, Russia
| | - Konstantin L. Ivanov
- International Tomography Center, Siberian Branch of the Russian Academy of Science, Novosibirsk 630090, Russia and Novosibirsk State University, Novosibirsk 630090, Russia
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Ivanov KL, Wagenpfahl A, Deibel C, Matysik J. Spin-chemistry concepts for spintronics scientists. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2017; 8:1427-1445. [PMID: 28900597 PMCID: PMC5530719 DOI: 10.3762/bjnano.8.143] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 06/13/2017] [Indexed: 05/03/2023]
Abstract
Spin chemistry and spintronics developed independently and with different terminology. Until now, the interaction between the two fields has been very limited. In this review, we compile the two "languages" in an effort to enhance communication. We expect that knowledge of spin chemistry will accelerate progress in spintronics.
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Affiliation(s)
- Konstantin L Ivanov
- International Tomography Center, Siberian Branch of Russian Academy of Science, Institutskaya 3а, Novosibirsk, 630090 Russia
- Novosibirsk State University, Institutskaya 3а, Novosibirsk, 630090 Russia
| | | | - Carsten Deibel
- Institut für Physik, Technische Universität Chemnitz, 09126 Chemnitz, Germany
| | - Jörg Matysik
- Universität Leipzig, Institut für Analytische Chemie, Linnéstr. 3, D-04103 Leipzig, Germany
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Affiliation(s)
- Norbert Hoffmann
- CNRS Université de Reims Champagne-Ardenne; ICMR; Université de Reims Champagne-Ardenne; B.P. 1039 51687 Reims France
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Troian-Gautier L, Mugeniwabagara E, Fusaro L, Moucheron C, Kirsch-De Mesmaeker A, Luhmer M. pH Dependence of Photoinduced Electron Transfer with [Ru(TAP)3]2+. Inorg Chem 2016; 56:1794-1803. [DOI: 10.1021/acs.inorgchem.6b01780] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ludovic Troian-Gautier
- Laboratoire
de Chimie Organique et Photochimie and §Laboratoire de Résonance Magnétique
Nucléaire Haute Résolution, Université libre de Bruxelles, 50 av. F. D. Roosevelt, CP160/08, B-1050 Bruxelles, Belgium
| | - Epiphanie Mugeniwabagara
- Laboratoire
de Chimie Organique et Photochimie and §Laboratoire de Résonance Magnétique
Nucléaire Haute Résolution, Université libre de Bruxelles, 50 av. F. D. Roosevelt, CP160/08, B-1050 Bruxelles, Belgium
| | - Luca Fusaro
- Laboratoire
de Chimie Organique et Photochimie and §Laboratoire de Résonance Magnétique
Nucléaire Haute Résolution, Université libre de Bruxelles, 50 av. F. D. Roosevelt, CP160/08, B-1050 Bruxelles, Belgium
| | - Cécile Moucheron
- Laboratoire
de Chimie Organique et Photochimie and §Laboratoire de Résonance Magnétique
Nucléaire Haute Résolution, Université libre de Bruxelles, 50 av. F. D. Roosevelt, CP160/08, B-1050 Bruxelles, Belgium
| | - Andrée Kirsch-De Mesmaeker
- Laboratoire
de Chimie Organique et Photochimie and §Laboratoire de Résonance Magnétique
Nucléaire Haute Résolution, Université libre de Bruxelles, 50 av. F. D. Roosevelt, CP160/08, B-1050 Bruxelles, Belgium
| | - Michel Luhmer
- Laboratoire
de Chimie Organique et Photochimie and §Laboratoire de Résonance Magnétique
Nucléaire Haute Résolution, Université libre de Bruxelles, 50 av. F. D. Roosevelt, CP160/08, B-1050 Bruxelles, Belgium
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Roth HD, Sauers RS. Triplet recombination of radical ion pairs: CIDNP effects and DFT calculations on 1,2-dicyanoethylene. Photochem Photobiol Sci 2013; 12:2036-42. [PMID: 24056988 DOI: 10.1039/c3pp50213a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Radical ion pairs generated by electron transfer from photo-excited aromatic hydrocarbons to maleo- and fumaronitrile (cis- and trans-1,2-dicyanoethylene, 1) undergo back electron transfer from singlet and triplet pairs. The pair energies relative to the reactant ground states and to the triplet state, respectively, determine the competition between the recombination pathways. Cross sections through the potential surfaces of the radical anion and the triplet state of 1 have been examined by density functional theory calculations. The radical anion surface has minima in which the carbon and nitrogen skeleton is essentially planar; the central C-C bond is lengthened (weakened), but the barrier to geometric isomerization is still sizeable (31.2 kcal mol(-1)). The triplet energy surface has a minimum at a bisected geometry (plus its enantiomer); rotation of the H-C-CN segments of the triplet yields a syn-periplanar and an anti-periplanar point 9.3 kcal mol(-1) and 8.2 kcal mol(-1) above the minimum, respectively.
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Affiliation(s)
- Heinz D Roth
- Department of Chemistry and Chemical Biology, Rutgers University, Wright-Rieman Laboratories, New Brunswick, NJ 08854-8087, USA.
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Jiménez ÁJ, Sekita M, Caballero E, Marcos ML, Rodríguez-Morgade MS, Guldi DM, Torres T. Assembling a Phthalocyanine and Perylenediimide Donor-Acceptor Hybrid through a Platinum(II) Diacetylide Linker. Chemistry 2013; 19:14506-14. [DOI: 10.1002/chem.201301630] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2013] [Indexed: 11/07/2022]
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Perrier S, Mugeniwabagara E, Kirsch-De Mesmaeker A, Hore PJ, Luhmer M. Exploring photoreactions between polyazaaromatic Ru(II) complexes and biomolecules by chemically induced dynamic nuclear polarization measurements. J Am Chem Soc 2009; 131:12458-65. [PMID: 19658383 DOI: 10.1021/ja9024287] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Steady-state (1)H photo-chemically induced dynamic nuclear polarization (CIDNP) experiments were conducted at 14.1 T on deoxygenated (buffered pH 7) aqueous solutions of [Ru(phen)(3)](2+), [Ru(tap)(2)(phen)](2+), and [Ru(tap)(3)](2+) (tap = 1,4,5,8-tetraazaphenanthrene; phen = 1,10-phenanthroline) in the presence of guanosine-5'-monophosphate or N-acetyltyrosine. For the first time, CIDNP arising from photo-oxidation by polyazaaromatic Ru(II) complexes is reported. In agreement with the occurrence of a photo-electron-transfer process, photo-CIDNP effects are observed with [Ru(tap)(3)](2+) and [Ru(tap)(2)(phen)](2+) but not with [Ru(phen)(3)](2+). With [Ru(tap)(2)(phen)](2+), no significant photo-CIDNP is observed for the (1)H nuclei of the phen ligand, consistent with the fact that the metal-to-ligand charge-transfer triplet excited states responsible for the photo-oxidation involve a tap ligand. Successive experiments with [Ru(tap)(3)](2+) highlight the accumulation of long-lived radical species in solution that cause (1)H NMR signal broadening and photo-CIDNP extinction. The (1)H photo-CIDNP observed for the biomolecules is rather weak, less than about 30% of the equilibrium magnetization. However, up to 60% polarization enhancement is observed for H-2 and H-7 of the tap ligands, which indicates high unpaired electron density in the vicinity of these atoms in the transient radical pair. This is consistent with the structure of known photoadducts formed, for instance, between the metallic compounds and the guanine base of mono- and polynucleotides. Indeed, in these adducts the covalent bond involves carbon C-2 or C-7 of a tap ligand. The occurrence of photo-CIDNP with polyazaaromatic Ru(II) complexes opens new perspectives for the study of this type of compound.
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Affiliation(s)
- Sandrine Perrier
- Laboratoire de Résonance Magnétique Nucléaire Haute Résolution, Université Libre de Bruxelles, 50 Av. F.D. Roosevelt, B-1050 Bruxelles, Belgium
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Goez M, Eckert G. Olefin Isomerizationvia Radical-Ion Pairs in Triplet States Studied by Chemically Induced Dynamic Nuclear Polarization (CIDNP). Helv Chim Acta 2006. [DOI: 10.1002/hlca.200690205] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Roth HD, Herbertz T, Sauers RR, Weng H. Intramolecular nucleophilic capture of radical cations by tethered hydroxy functions. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.03.064] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Goez M, Eckert G. Photoinduced electron transfer sensitization investigated by chemically induced dynamic nuclear polarizatioin (CIDNP). Phys Chem Chem Phys 2006; 8:5294-303. [DOI: 10.1039/b609026e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ikeda H, Ikeda T, Akagi M, Namai H, Miyashi T, Takahashi Y, Kamata M. Direct observation and kinetic characterization of o-quinodimethane and its radical cation variant generated in a photoinduced electron-transfer reaction of 1,2-bis(α-styryl)benzene. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.01.124] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Crespo-Hernández C, Arce R, Quiñones E. Magnetic field-enhanced photoinization of 6-methylpurine. Chem Phys Lett 2003. [DOI: 10.1016/j.cplett.2003.10.109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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