1
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Masuzawa K, Sato M, Sugawara M, Maeda K. Quantum control of radical pair reactions by local optimization theory. J Chem Phys 2020; 152:014301. [DOI: 10.1063/1.5131557] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Affiliation(s)
- Kenta Masuzawa
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-okubo, Sakura Ward, 338-8570 Saitama, Japan
| | - Masaya Sato
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-okubo, Sakura Ward, 338-8570 Saitama, Japan
| | - Michihiko Sugawara
- Keio Quantum Computing Center, Keio University, Kanagawa 223-8522, Japan
| | - Kiminori Maeda
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-okubo, Sakura Ward, 338-8570 Saitama, Japan
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2
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Hiscock HG, Kattnig DR, Manolopoulos DE, Hore PJ. Floquet theory of radical pairs in radiofrequency magnetic fields. J Chem Phys 2016; 145:124117. [DOI: 10.1063/1.4963793] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Affiliation(s)
- Hamish G. Hiscock
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - Daniel R. Kattnig
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - David E. Manolopoulos
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - P. J. Hore
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
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3
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Maeda K, Storey JG, Liddell PA, Gust D, Hore PJ, Wedge CJ, Timmel CR. Probing a chemical compass: novel variants of low-frequency reaction yield detected magnetic resonance. Phys Chem Chem Phys 2014; 17:3550-9. [PMID: 25537133 DOI: 10.1039/c4cp04095c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present a study of a carotenoid-porphyrin-fullerene triad previously shown to function as a chemical compass: the photogenerated carotenoid-fullerene radical pair recombines at a rate sensitive to the orientation of an applied magnetic field. To characterize the system we develop a time-resolved Low-Frequency Reaction Yield Detected Magnetic Resonance (tr-LF-RYDMR) technique; the effect of varying the relative orientation of applied static and 36 MHz oscillating magnetic fields is shown to be strongly dependent on the strength of the oscillating magnetic field. RYDMR is a diagnostic test for involvement of the radical pair mechanism in the magnetic field sensitivity of reaction rates or yields, and has previously been applied in animal behavioural experiments to verify the involvement of radical-pair-based intermediates in the magnetic compass sense of migratory birds. The spectroscopic selection rules governing RYDMR are well understood at microwave frequencies for which the so-called 'high-field approximation' is valid, but at lower frequencies different models are required. For example, the breakdown of the rotating frame approximation has recently been investigated, but less attention has so far been given to orientation effects. Here we gain physical insights into the interplay of the different magnetic interactions affecting low-frequency RYDMR experiments performed in the challenging regime in which static and oscillating applied magnetic fields as well as internal electron-nuclear hyperfine interactions are of comparable magnitude. Our observations aid the interpretation of existing RYDMR-based animal behavioural studies and will inform future applications of the technique to verify and characterize further the biological receptors involved in avian magnetoreception.
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Affiliation(s)
- Kiminori Maeda
- Department of Chemistry, University of Oxford, Centre for Advanced Electron Spin Resonance, Inorganic Chemistry Laboratory, Oxford, OX1 3QR, UK.
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Wedge CJ, Lau JCS, Ferguson KA, Norman SA, Hore PJ, Timmel CR. Spin-locking in low-frequency reaction yield detected magnetic resonance. Phys Chem Chem Phys 2013; 15:16043-53. [PMID: 23963374 DOI: 10.1039/c3cp52019f] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The purported effects of weak magnetic fields on various biological systems from animal magnetoreception to human health have generated widespread interest and sparked much controversy in the past decade. To date the only well established mechanism by which the rates and yields of chemical reactions are known to be influenced by magnetic fields is the radical pair mechanism, based on the spin-dependent reactivity of radical pairs. A diagnostic test for the operation of the radical pair mechanism was proposed by Henbest et al. [J. Am. Chem. Soc., 2004, 126, 8102] based on the combined effects of weak static magnetic fields and radiofrequency oscillating fields in a reaction yield detected magnetic resonance experiment. Here we investigate the effects on radical pair reactions of applying relatively strong oscillating fields, both parallel and perpendicular to the static field. We demonstrate the importance of understanding the effect of the strength of the radiofrequency oscillating field; our experiments demonstrate that there is an optimal oscillating field strength above which the observed signal decreases in intensity and eventually inverts. We establish the correlation between the onset of this effect and the hyperfine structure of the radicals involved, and identify the existence of 'overtone' type features appearing at multiples of the expected resonance field position.
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Affiliation(s)
- C J Wedge
- Department of Chemistry, University of Oxford, Centre for Advanced Electron Spin Resonance, South Parks Road, Oxford, OX1 3QR, UK.
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5
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Batchelor S, Mclauchlan K, Shkrob I. Reaction yield detected magnetic resonance in exciplex systems. Mol Phys 2007. [DOI: 10.1080/00268979200100391] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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6
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Ishigaki A, Murai H. Time-resolved ESR study on a long-lived radical-ion pair formed in the photoinduced electron-transfer reaction of xanthone and N,N-diethylaniline in 2-propanol. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.05.085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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7
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Timmel CR, Henbest KB. A study of spin chemistry in weak magnetic fields. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2004; 362:2573-2589. [PMID: 15539359 DOI: 10.1098/rsta.2004.1459] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
This paper reviews the latest developments in the field of spin chemistry with a particular focus on the effects of weak static and/or oscillating magnetic fields (typically smaller than the average hyperfine coupling) on radical recombination reactions. Anisotropic magnetic field effects and their significance in the debate about potential mechanisms controlling magnetoreception in birds are discussed.
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Affiliation(s)
- Christiane R Timmel
- Physical and Theoretical Chemistry Laboratory, University of Oxford, Oxford OX1 3QZ, UK.
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8
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Spin-chemical approach to photochemistry: reaction control by spin quantum operation. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2003. [DOI: 10.1016/s1389-5567(02)00038-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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9
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KAGEYAMA ATSUSHI, YASHIRO HARUHIKO, MURAI HISAO. Observation and reaction control of a singlet born radical pair formed photochemically in an SDS micelle by pulsed microwave irradiation. Mol Phys 2002. [DOI: 10.1080/00268970110112381] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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10
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WOODWARD JONATHANR, TIMMEL CHRISTIANER, HORE PJ, McLAUCHLAN KEITHA. Low field RYDMR: effects of orthogonal static and oscillating magnetic fields on radical recombination reactions. Mol Phys 2002. [DOI: 10.1080/00268970110109961] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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11
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Justinek M, Grampp G, Landgraf S. Determination of electron self-exchange rate constants with MARY spectroscopy: Dependence on the fluorophore. Phys Chem Chem Phys 2002. [DOI: 10.1039/b205606b] [Citation(s) in RCA: 7] [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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Matsuyama A, Murai H. Effect of the Spin Dephasing on the Photoconductivity-Detected Magnetic Resonance Spectra Observed in the Photolysis of Xanthone and N,N-Diethylaniline in 2-Propanol. J Phys Chem A 2001. [DOI: 10.1021/jp012563i] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Akihito Matsuyama
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Hisao Murai
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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13
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Validity and possibility of photoconductivity-detected magnetic resonance (PCDMR) method as one of reaction-yield-detected magnetic resonance (RYDMR) methods. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(00)01361-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Stass D, Woodward J, Timmel C, Hore P, McLauchlan K. Radiofrequency magnetic field effects on chemical reaction yields. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)00980-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Affiliation(s)
- M. Molotskii
- Beverly and Raymond Sackler Faculty of Exact Sciences, School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
| | - V. Fleurov
- Beverly and Raymond Sackler Faculty of Exact Sciences, School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
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Matsuyama A, Maeda K, Murai H. Photoconductivity Detected Magnetic Resonance Study on Photoinduced Electron-Transfer Reaction of Xanthone and N,N-Diethylaniline in 2-Propanol. J Phys Chem A 1999. [DOI: 10.1021/jp9846173] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Akihito Matsuyama
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Kiminori Maeda
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Hisao Murai
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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17
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Fukuju T, Yashiro H, Maeda K, Murai H. Real-time observation of the singlet–triplet dephasing effect on the spin dynamics of the spin-correlated radical pair formed in the photolysis of tetraphenylhydrazine in a micelle. Chem Phys Lett 1999. [DOI: 10.1016/s0009-2614(99)00320-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Nakai M, Maeda K, Murai H. Delayed fluorescence detected magnetic resonance study on the spin dynamics of the transient radical-ion pair formed in the photolysis of carbazole in 2-propanol. Chem Phys Lett 1999. [DOI: 10.1016/s0009-2614(99)00148-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Iwasaki Y, Murai H, Maeda K, Azumi T. Study on the coherent spin motion of the radical-ion pair formed in the laser photolysis of N,N,N′,N′-tetramethyl-1,4-phenylenediamine in 2-propanol. Chem Phys 1998. [DOI: 10.1016/s0301-0104(98)00053-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Enjo K, Maeda K, Murai H, Azumi T, Tanimoto Y. Effect of Polymethylene-Chain Dynamics on the Lifetime of a Charge-Separated Biradical Studied by RYDMR Spectroscopy. J Phys Chem B 1997. [DOI: 10.1021/jp9717857] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kentaro Enjo
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-77, Japan
| | - Kiminori Maeda
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-77, Japan
| | - Hisao Murai
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-77, Japan
| | - Tohru Azumi
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-77, Japan
| | - Yoshifumi Tanimoto
- Department of Chemistry, Faculty of Science, Hiroshima University, Hiroshima 730, Japan
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21
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Gorelik V, Morozov V, Lukzen N, Bagryanskaya E, Sagdeev R. The manifestation of degenerate electron exchange in stimulated nuclear polarization at high magnetic fields. Chem Phys 1997. [DOI: 10.1016/s0301-0104(97)00266-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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22
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Sakaguchi Y, Hayashi H. Magnetic Field Effects on the Photochemical Electron-Transfer Reactions of 10-Methylphenothiazine and Dicyanobenzene Derivatives in Nonviscous Homogeneous Solutions. J Phys Chem A 1997. [DOI: 10.1021/jp961907f] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yoshio Sakaguchi
- Molecular Photochemistry Laboratory, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-01, Japan
| | - Hisaharu Hayashi
- Molecular Photochemistry Laboratory, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-01, Japan
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23
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24
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Murai H, Matsuyama A, Ishida T, Iwasaki Y, Maeda K, Azumi T. Conrolling of radical-ion pair reactions by microwave radiation: photoconductivity-detected magnetic resonance. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(96)01383-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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25
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The time-resolved absorption-detected magnetic resonance spectrum of the polymethylene linked biradical: effect of the exchange integral. Chem Phys Lett 1996. [DOI: 10.1016/0009-2614(96)01047-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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26
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Timmel C, Hore P. Oscillating magnetic field effects on the yields of radical pair reactions. Chem Phys Lett 1996. [DOI: 10.1016/0009-2614(96)00466-6] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Shkrob IA, Trifunac AD. Ionization and H abstraction in laser photolysis of TMPD. A time-resolved pulsed EPR study. Chem Phys 1996. [DOI: 10.1016/0301-0104(95)00318-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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28
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29
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Shokhirev NV, Krissinel' EB. Simple analytical approach to the description of flash-CIDNP formation for ion radicals. Chem Phys Lett 1995. [DOI: 10.1016/0009-2614(95)00215-p] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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30
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31
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Batchelor SN, McLauchlan KA, Shkrob IA. Radical Pair Phenomena in Exciplex and Excited Radical Systems*. ACTA ACUST UNITED AC 1993. [DOI: 10.1524/zpch.1993.180.part_1_2.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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32
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Batchelor S, McLauchlan K, Shkrob I. Reaction yield detected magnetic resonance and magnetic field effect studies of radical pairs containing electronically excited organic radicals. Mol Phys 1992. [DOI: 10.1080/00268979200102331] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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33
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Radical Pair Phenomena in Exciplex and Excited Radical Systems*. Z PHYS CHEM 1992. [DOI: 10.1524/zpch.1992.1.part_1.009] [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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