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Jenkins AJ, Mao Z, Kurimoto A, Mix LT, Frank N, Larsen DS. Ultrafast Spintronics: Dynamics of the Photoisomerization-Induced Spin-Charge Excited-State (PISCES) Mechanism in Spirooxazine-Based Photomagnetic Materials. J Phys Chem Lett 2018; 9:5351-5357. [PMID: 30157382 DOI: 10.1021/acs.jpclett.8b02166] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The optical control of spin state is of interest in the development of spintronic materials for data processing and storage technologies. Photomagnetic effects at the single-molecule level have recently been observed in the thin film state at 300 K in photochromic cobalt dioxolenes. Visible light excitation leads to ring-closure of a photochromic spirooxazine bound to a cobalt dioxolene, which leads to generation of a high magnetization state. Formation of the photomagnetic state occurs through a photoisomerization-induced spin-charge excited-state process and is dictated by the spirooxazine ligand dynamics. Here, we report a mechanistic investigation by ultrafast spectroscopy in the UV-vis region of the photochemical ring-closing process in the parent spirooxazine, azahomoadamantylphenanthroline spirooxazine, and the photomagnetic spirooxazine cobalt-dioxolene complex. The cobalt appears to stabilize a photomerocycanine transient intermediate, presumably the TCC isomer, formed along the ground-state potential energy surface (PES). Structural changes associated with the TCC isomer induces formation of the high-spin Co(II) form, suggesting that magnetization dymanics can occur along the excited-state PES, leading to ultrafast switching on the ps time scale. We demonstrate the full ring closure of the spiro-oxazine ligand is not required to switch magnetization states which can be induced with a higher yielding isomerization reaction. The ability of this system to undergo optically induced spin state switching on the ps time scale in the solid state makes it a promising canididate for resistive nonvolatile memory technologies.
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Affiliation(s)
- Adam J Jenkins
- Department of Chemistry , University of California, Davis , One Shields Avenue , Davis , California 95616 , United States
| | - Ziliang Mao
- Department of Chemistry , University of California, Davis , One Shields Avenue , Davis , California 95616 , United States
| | - Aiko Kurimoto
- Department of Chemistry , University of Victoria , PO Box 1700 STN CSC1.5 , Victoria , British Columbia V8P 5C2up , Canada
| | - L Tyler Mix
- Department of Chemistry , University of California, Davis , One Shields Avenue , Davis , California 95616 , United States
| | - Natia Frank
- Department of Chemistry , University of Victoria , PO Box 1700 STN CSC1.5 , Victoria , British Columbia V8P 5C2up , Canada
| | - Delmar S Larsen
- Department of Chemistry , University of California, Davis , One Shields Avenue , Davis , California 95616 , United States
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Yang D, Yang Y, Liu Y. A TD-DFT study on the excited-state hydrogen-bonding interactions in the 2-(2-thienyl)-3-hydroxy-4(1H)-quinolone-(H2O)3 cluster. COMPUT THEOR CHEM 2012. [DOI: 10.1016/j.comptc.2012.07.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Plyusnin VF, Glebov EM, Grivin VP, Korolev VV, Metelitsa AV, Voloshin NA, Minkin VI. Photochromic properties of phenanthroline-annulated spirooxazine in the solid state. Russ Chem Bull 2011. [DOI: 10.1007/s11172-011-0017-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hu J, Liu L, Jia D, Guo J, Xie X, Wu D, Sheng R. Crystal structures and photoisomerization behaviors of five novel pyrazolone derivatives containing furoyl group. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2010.09.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Abstract
9′-Hydroxy-1,3,3-trimethylspiro[indoline-2,3′[3H]naphtha[2,1-b]-1,4oxazine] (SPO-7OH) was used in studies of photochromic transformations in polymer matrices. Illumination with UV lamp caused opening the spirostructure of the oxazine with formation of open merocyanine species absorbing at ca. 610 nm. The kinetic studies of thermal relaxation of the open form showed that this process can be described with a biexponential function including both photochemical reaction and rheological behaviour of the polymeric environment. Basing on Arrhenius plot of the rate constant ascribed to the photochemical reaction, the activation energy was determined, which was 66.1 and 84.7 kJ/mole for poly(methyl methacrylate-co-butyl methacrylate) and poly(vinylpyrrolidone) matrix, respectively.
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Kinashi K, Ono Y, Naitoh Y, Otomo A, Ueda Y. Time-resolved fluorescence study on the photomerocyanine form of spiropyran and its derivative with azobenzene. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2010.09.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Wei N, Li P, Hao C, Wang R, Xiu Z, Chen J, Song P. Time-dependent density functional theory study of the excited-state dihydrogen bond O–H⋯H–Si. J Photochem Photobiol A Chem 2010. [DOI: 10.1016/j.jphotochem.2009.12.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Whelan J, Abdallah D, Wojtyk J, Buncel E. Micro-environmental fine-tuning of electronic and kinetic properties of photochromic dyes. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm00585a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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