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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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2
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Xiong Y, Vargas Jentzsch A, Osterrieth JWM, Sezgin E, Sazanovich IV, Reglinski K, Galiani S, Parker AW, Eggeling C, Anderson HL. Spironaphthoxazine switchable dyes for biological imaging. Chem Sci 2018; 9:3029-3040. [PMID: 29732087 PMCID: PMC5916019 DOI: 10.1039/c8sc00130h] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 02/17/2018] [Indexed: 12/23/2022] Open
Abstract
Recent developments in super-resolution microscopy have significantly expanded the requirements for switchable dyes, leading to demand for specially designed molecular switches. We report the synthesis and characterization of a spironaphthoxazine photochromic switch (a derivative of palatinate purple) displaying high photoconversion (85-95%) under readily accessible 405 nm light, broad absorption in the visible, and excellent fatigue resistance. The indole substituent on this spironaphthoxazine is twisted out of conjugation with the naphthalene unit, yet it is crucial for activation with visible light. The open colored merocyanine form of the spironaphthoxazine reverts to the closed form with a lifetime of 4.7 s in dichloromethane at 20 °C; this thermal reversion is even faster in more polar solvents. The photochemical quantum yields for ring-opening and ring-closing are approximately 8% and 1%, respectively, in dichloromethane. The ring-opening and ring-closing reactions have been characterized by time-resolved infrared and transient absorption spectroscopies. Ring opening occurs rapidly (τ = 2.1 ns) and efficiently (∼90%) from the singlet excited state to form an intermediate (assigned as a cisoid merocyanine), which returns to the closed ground state (τ = 4.5 ns) in competition with relaxation to the transoid open form (τ = 40 ns). Photochemical ring closing is a faster and simpler process: the excited state proceeds to the closed spirooxazine with a time constant of 0.28 ns. This photochromic switch can be used in conjunction with commercial fluorescent dyes to create a small-molecule switchable fluorescent dyad that shows high contrast and good fatigue resistance in living cells. These properties make the dyads suitable for application in RESOLFT microscopy.
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Affiliation(s)
- Yaoyao Xiong
- Department of Chemistry , University of Oxford , Chemistry Research Laboratory , Oxford OX1 3TA , UK .
| | - Andreas Vargas Jentzsch
- Department of Chemistry , University of Oxford , Chemistry Research Laboratory , Oxford OX1 3TA , UK .
| | - Johannes W M Osterrieth
- Department of Chemistry , University of Oxford , Chemistry Research Laboratory , Oxford OX1 3TA , UK .
| | - Erdinc Sezgin
- MRC Human Immunology Unit , Weatherall Institute of Molecular Medicine , University of Oxford , OX3 9DS , Oxford , UK
| | - Igor V Sazanovich
- Central Laser Facility , Research Complex at Harwell, Science and Technology Facilities Council , Harwell Campus , Didcot OX11 0QX , UK
| | - Katharina Reglinski
- MRC Human Immunology Unit , Weatherall Institute of Molecular Medicine , University of Oxford , OX3 9DS , Oxford , UK
| | - Silvia Galiani
- MRC Human Immunology Unit , Weatherall Institute of Molecular Medicine , University of Oxford , OX3 9DS , Oxford , UK
| | - Anthony W Parker
- Central Laser Facility , Research Complex at Harwell, Science and Technology Facilities Council , Harwell Campus , Didcot OX11 0QX , UK
| | - Christian Eggeling
- MRC Human Immunology Unit , Weatherall Institute of Molecular Medicine , University of Oxford , OX3 9DS , Oxford , UK.,Institute of Applied Optics , Friedrich-Schiller-University Jena , Jena , Germany.,Leibniz Institute of Photonic Technology e.V. , Jena , Germany
| | - Harry L Anderson
- Department of Chemistry , University of Oxford , Chemistry Research Laboratory , Oxford OX1 3TA , UK .
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3
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Promoted colorimetric response of spirooxazine derivative: a simple assay for sensitive mercury(II) detection. RESEARCH ON CHEMICAL INTERMEDIATES 2016. [DOI: 10.1007/s11164-015-2389-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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4
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Siddiqui KM, Corthey G, Hayes SA, Rossos A, Badali DS, Xian R, Murphy RS, Whitaker BJ, Miller RJD. Synchronised photoreversion of spirooxazine ring opening in thin crystals to uncover ultrafast dynamics. CrystEngComm 2016. [DOI: 10.1039/c6ce01049k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A ‘recover before destroy’ approach to minimise photoproduct build-up in solid state enables ultrafast studies of chemical reactions.
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Affiliation(s)
- Khalid M. Siddiqui
- Max Planck Institute for the Structure and Dynamics of Matter
- Center for Free Electron Laser Science
- Hamburg, Germany
- School of Chemistry
- University of Leeds
| | - Gastón Corthey
- Max Planck Institute for the Structure and Dynamics of Matter
- Center for Free Electron Laser Science
- Hamburg, Germany
| | - Stuart A. Hayes
- Max Planck Institute for the Structure and Dynamics of Matter
- Center for Free Electron Laser Science
- Hamburg, Germany
| | - Andreas Rossos
- Max Planck Institute for the Structure and Dynamics of Matter
- Center for Free Electron Laser Science
- Hamburg, Germany
| | - Daniel S. Badali
- Max Planck Institute for the Structure and Dynamics of Matter
- Center for Free Electron Laser Science
- Hamburg, Germany
| | - Rui Xian
- Max Planck Institute for the Structure and Dynamics of Matter
- Center for Free Electron Laser Science
- Hamburg, Germany
| | - R. Scott Murphy
- Department of Chemistry and Biochemistry
- Research and Innovation Centre
- University of Regina
- Regina, Canada
| | | | - R. J. Dwayne Miller
- Max Planck Institute for the Structure and Dynamics of Matter
- Center for Free Electron Laser Science
- Hamburg, Germany
- Hamburg Center for Ultrafast Imaging
- University of Hamburg
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5
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Thermal racemization of spiropyrans: implication of substituent and solvent effects revealed by computational study. Struct Chem 2013. [DOI: 10.1007/s11224-013-0374-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Nikolaeva MI, Korolev VV, Pritchina EA, Glebov EM, Plyusnin VF, Metelitsa AV, Voloshin NA, Minkin VI. Photochromism of 6′-cyanosubstituted spirooxazines in frozen alcohol matrices. KINETICS AND CATALYSIS 2011. [DOI: 10.1134/s0023158411020145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Nikolaeva MI, Korolev VV, Pritchina EA, Glebov EM, Plyusnin VF, Metelitsa AV, Voloshin NA, Minkin VI. Photochemistry of a 6′-cyanosubstituted spironaphthooxazine: photo-induced decay of an open form. J PHYS ORG CHEM 2011. [DOI: 10.1002/poc.1852] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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8
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Zhi JF, Baba R, Hashimoto K, Fujishima A. A Multi-Functional Electro-Optical Molecular Device. The Photoelectrochemical Behavior of Spirobenzopyrans in Dimethylformamide. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19950990106] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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9
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di Nunzio MR, Danilov EO, Rodgers MAJ, Favaro G. Ultrafast excited-state dynamics in some spirooxazines and chromenes. Evidence for a dual relaxation pathway. Photochem Photobiol Sci 2010; 9:1391-9. [DOI: 10.1039/c0pp00149j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Aubard J, Maurel F, Buntinx G, Guglielmetti R, Levi G. Picosecond Time-Resolved Resonance Raman Spectroscopy and Vibrational Analysis in Spirooxazine Photochromism. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587250008023919] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- J. Aubard
- a Université Denis Diderot-Paris 7, ITODYS, ESA CNRS 7086 , 1 rue Guy de la Brosse, 75005 , Paris , France
| | - F. Maurel
- a Université Denis Diderot-Paris 7, ITODYS, ESA CNRS 7086 , 1 rue Guy de la Brosse, 75005 , Paris , France
| | - G. Buntinx
- b Université des Sciences et Technologies de Lille, LASIR, UMR CNRS 8516 , Bat. C5, 59655 , Villeneuve d'Ascq Cedex , France
| | - R. Guglielmetti
- c Université de la Méditerrannée, LCMOM, ESA CNRS 6114, Faculté des Sciences de Luminy , Case 901-13288 , Marseille Cedex 9 , France
| | - G. Levi
- a Université Denis Diderot-Paris 7, ITODYS, ESA CNRS 7086 , 1 rue Guy de la Brosse, 75005 , Paris , France
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11
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Glebov E, Vorobyev D, Grivin V, Plyusnin V, Metelitsa A, Voloshin N, Minkin V, Micheau J. Photochemistry of phenanthroline-containing spirooxazines in a low-temperature methanol matrix. Chem Phys 2006. [DOI: 10.1016/j.chemphys.2005.10.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Maurel F, Aubard J, Millie P, Dognon JP, Rajzmann M, Guglielmetti R, Samat A. Quantum Chemical Study of the Photocoloration Reaction in the Napthoxazine Series. J Phys Chem A 2006; 110:4759-71. [PMID: 16599444 DOI: 10.1021/jp054976f] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ab initio and semiempirical quantum mechanical calculations were performed to study the electronic spectra of spiroxazine photochromic compounds as well as the corresponding photoisomers. Ground-state geometries were optimized based on density functional theory (DFT). Excitation energies of the different forms were calculated using the time-dependent density functional theory (TD-DFT) method. Semiempirical calculations including configuration interactions were performed to detail the mechanism of ring opening in excited states. On the basis of the obtained potential energy profile, a complete mechanism of photocoloration able to clarify some experimental findings is provided. A correlation of the experimental quantum yield of photocoloration with the calculated properties as a function of substituent effects is proposed.
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Affiliation(s)
- F Maurel
- Laboratoire Interfaces, Traitements, Organisation et DYnamique des Systèmes, ITODYS, Université de Paris 7-Denis Diderot, UMR 7086, 1 rue Guy de la Brosse 75005 Paris, France.
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13
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Gómez I, Reguero M, Robb MA. Efficient Photochemical Merocyanine-to-Spiropyran Ring Closure Mechanism through an Extended Conical Intersection Seam. A Model CASSCF/CASPT2 Study. J Phys Chem A 2006; 110:3986-91. [PMID: 16539421 DOI: 10.1021/jp056208u] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A mechanism of the thermal and photochemical bleaching of merocyanine to spiropyran is proposed on the basis of CASSCF/CASPT2 calculations on the 6-(2-propenyliden)cyclohexadienone model system. Our results suggest that this photochemical transformation takes place in two steps. First, the initially pumped 1(pi-pi) S2 undergoes radiationless decay to 1(n-pi) S1 via an extended S2/S1 conical intersection seam that runs approximately parallel to the trans-to-cis isomerization coordinate, a few kilocalories per mole higher in energy. Thus, S2 --> S1 internal conversion is possible at all values of the S2 trans-to-cis reaction coordinate. Second, on the S1 potential energy surface, there is a barrierless ring closure reaction path from the S1 cis minimum that leads to a peaked S1/S0 conical intersection where the deactivation to the ground state takes place. The inertia of the moving nuclei then drives the system toward the ground-state minimum of the 2H-chromene product. Thus, the extended seam topology of the S2/S1 conical intersection and the coordinate of the branching space of the S1/S0 conical intersection are essential to explain the efficiency and high speed of this reaction.
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Affiliation(s)
- Isabel Gómez
- Department Química Física i Inorganica, Universitat Rovira i Virgili, C. Marcel lí Domingo s/n, Tarragona 43007, Spain
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14
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Sheng Y, Leszczynski J, Garcia AA, Rosario R, Gust D, Springer J. Comprehensive Theoretical Study of the Conversion Reactions of Spiropyrans: Substituent and Solvent Effects. J Phys Chem B 2004. [DOI: 10.1021/jp0488867] [Citation(s) in RCA: 146] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Buntinx G, Foley S, Lefumeux C, Lokshin V, Poizat O, Samat A. Evidence for a photophysical deactivation pathway competing with the photochromic transformation in a cyano-substituted spironaphthoxazine. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.04.057] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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16
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Minkin VI. Photo-, Thermo-, Solvato-, and Electrochromic Spiroheterocyclic Compounds. Chem Rev 2004; 104:2751-76. [PMID: 15137806 DOI: 10.1021/cr020088u] [Citation(s) in RCA: 625] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vladimir I Minkin
- Institute of Physical and Organic Chemistry, Rostov State University, 194/2 Stachka Avenue, 344090 Rostov on Don, Russian Federation.
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17
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Konorov S, Sidorov-Biryukov D, Bugar I, Chorvat D, Chorvat D, Zheltikov A. Femtosecond two-photon-absorption-resonant four-wave mixing for time-resolved studies of photochromism in three dimensions. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)01313-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Feneyrou P, Soyer F, Le Barny P, Ishow E, Sliwa M, Delaire JA. Photochromic compounds as optical limiters in the nanosecond time range: the example of mercury dithizonate complex. Photochem Photobiol Sci 2003; 2:195-202. [PMID: 12713217 DOI: 10.1039/b210944c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although being an efficient photochromic compound which absorbs in the blue in its stable form and in the orange in its photoactivated form, the mercury dithizonate complex is shown to be a poor optical limiter for nanosecond laser pulses at the wavelengths where both isomers absorb. Optical limiting effect, which is a consequence of reverse saturable absorption due to the photoactivated form, is demonstrated to be weak because of the back photobleaching of this form, which is important all the more as the laser intensity is high. Numerical integration of the spatiotemporal evolution of the laser beam intensity across the solution helps the understanding of the respective roles of the laser fluence and pulse duration. Finally, we draw the conclusion that photochromic compounds can only be used as optical limiters if the time constant for the back photochemical reaction is slow compared to the pulse duration.
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Affiliation(s)
- Patrick Feneyrou
- Thales Research and Technology France, Domaine de Corbeville 91404 Orsay Cedex, France
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19
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Casades I, Alvaro M, García H, Pillai MN. Modified mesoporous MCM-41 as hosts for photochromic spirobenzopyrans. Photochem Photobiol Sci 2002; 1:219-23. [PMID: 12659520 DOI: 10.1039/b110936g] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The influence of the chemical composition and silylation of mesoporous MCM-41 materials on the photochromic behaviour of adsorbed spiropyran (BIPS) and 6-nitrospiropyran was studied. Upon incorporation, the spiropyrans underwent ring opening to form either zwitterionic merocyanine or its corresponding O-protonated form. In all silica MCM-41 or in the MCM-41 containing aluminium, the O-protonated merocyanine was predominantly formed. In the case of MCM-41 modified by silylation of the OH groups, a mixture of zwitterionic merocyanine and spiropyran was present. The photochromic response was studied by means of steady-state irradiation and by laser flash photolysis. Steady-state irradiation (lambda > 450 nm) of the solid samples gives rise in all cases to an intensity decrease of the absorption bands corresponding to either the protonated or the unprotonated merocyanine form (reverse photochromism). In contrast, laser flash photolysis at 308 nm of spiropyrans supported on silylated MCM-41 allows observation of the photochemical ring opening of residual spiropyran to the corresponding zwitterionic form (normal photochromism).
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Affiliation(s)
- Isabel Casades
- Instituto de Tecnología Química, Departamento de Química, Universidad Politécnica de Valencia, Camino de Vera, 46022, Valencia, Spain
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Asahi T, Suzuki M, Masuhara H. Cooperative Photochemical Reaction in Molecular Crystal Induced by Intense Femtosecond Laser Excitation: Photochromism of Spironaphthooxazine. J Phys Chem A 2001. [DOI: 10.1021/jp0129838] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tsuyoshi Asahi
- Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan
| | - Mototsugu Suzuki
- Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hiroshi Masuhara
- Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan
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21
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Horii T, Abe Y, Nakao R. Theoretical quantum chemical study of spironaphthoxazines and their merocyanines. J Photochem Photobiol A Chem 2001. [DOI: 10.1016/s1010-6030(01)00541-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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22
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Metelitsa AV, Micheau JC, Voloshin NA, Voloshina EN, Minkin VI. Kinetic and Thermodynamic Investigations of the Photochromism and Solvatochromism of Semipermanent Merocyanines. J Phys Chem A 2001. [DOI: 10.1021/jp010419r] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- A. V. Metelitsa
- Institute of Physical Organic Chemistry, Stachka Str., 194/2, Rostov on Don 344090, Russia, and IMRCP, UMR au CNRS no. 5623, Université Paul Sabatier, F-31062 Toulouse, France
| | - J. C. Micheau
- Institute of Physical Organic Chemistry, Stachka Str., 194/2, Rostov on Don 344090, Russia, and IMRCP, UMR au CNRS no. 5623, Université Paul Sabatier, F-31062 Toulouse, France
| | - N. A. Voloshin
- Institute of Physical Organic Chemistry, Stachka Str., 194/2, Rostov on Don 344090, Russia, and IMRCP, UMR au CNRS no. 5623, Université Paul Sabatier, F-31062 Toulouse, France
| | - E. N. Voloshina
- Institute of Physical Organic Chemistry, Stachka Str., 194/2, Rostov on Don 344090, Russia, and IMRCP, UMR au CNRS no. 5623, Université Paul Sabatier, F-31062 Toulouse, France
| | - V. I. Minkin
- Institute of Physical Organic Chemistry, Stachka Str., 194/2, Rostov on Don 344090, Russia, and IMRCP, UMR au CNRS no. 5623, Université Paul Sabatier, F-31062 Toulouse, France
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Osako H, Kono H, Sasaki M, Takahashi T, Ohga Y, Asano T. Solvent and Pressure Dependence of the Energy Profile for the Thermal Fading of a Merocyanine Formed from a Spironaphthoxazine. CHEM LETT 2001. [DOI: 10.1246/cl.2001.506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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24
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Affiliation(s)
- Naoto Tamai
- Department of Chemistry, Faculty of Science, Kwansei Gakuin University, Uegahara, Nishinomiya, Hyogo 660-8581, Japan, Department of Polymer Science and Engineering, Kyoto Institute of Technology, and CREST, Japan Science and Technology Corporation, Matsugasaki, Sakyo, Kyoto 606-8585, Japan
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Affiliation(s)
| | - Helmut Görner
- Max-Planck-Institut für Strahlenchemie, D-45413 Mülheim an der Ruhr, Germany
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26
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Kinetic modelling of the photochromism and photodegradation of a spiro[indoline-naphthoxazine]. J Photochem Photobiol A Chem 1999. [DOI: 10.1016/s1010-6030(99)00023-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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27
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Asahi T, Masuhara H. Photocoloration of Spironaphthoxazine Microcrystalline Powder by Femtosecond Laser Pulse Excitation. CHEM LETT 1997. [DOI: 10.1246/cl.1997.1165] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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28
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Horii T, Miyake Y, Nakao R, Abe Y. Another Photochromism of a Spironaphtoxazine Due to the Geometric Isomerization of the Open-Form. CHEM LETT 1997. [DOI: 10.1246/cl.1997.655] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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29
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Affiliation(s)
| | - Helmut Görner
- Max-Planck-Institut für Strahlenchemie, D-45413 Mülheim an der Ruhr, Germany
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30
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Malatesta V, Neri C, Wis ML, Montanari L, Millini R. Thermal and Photodegradation of Photochromic Spiroindolinenaphthooxazines and -pyrans: Reaction with Nucleophiles. Trapping of the Merocyanine Zwitterionic Form. J Am Chem Soc 1997. [DOI: 10.1021/ja961784c] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vincenzo Malatesta
- Contribution from the Great Lakes Chemical Italia s. r. l., Via Maritano 26, 20097 S. Donato (MI), Italy, and Eniricerche s. p. a., Via Maritano 26, 20097 S. Donato (MI), Italy
| | - Carlo Neri
- Contribution from the Great Lakes Chemical Italia s. r. l., Via Maritano 26, 20097 S. Donato (MI), Italy, and Eniricerche s. p. a., Via Maritano 26, 20097 S. Donato (MI), Italy
| | - Maria Lucia Wis
- Contribution from the Great Lakes Chemical Italia s. r. l., Via Maritano 26, 20097 S. Donato (MI), Italy, and Eniricerche s. p. a., Via Maritano 26, 20097 S. Donato (MI), Italy
| | - Luciano Montanari
- Contribution from the Great Lakes Chemical Italia s. r. l., Via Maritano 26, 20097 S. Donato (MI), Italy, and Eniricerche s. p. a., Via Maritano 26, 20097 S. Donato (MI), Italy
| | - Roberto Millini
- Contribution from the Great Lakes Chemical Italia s. r. l., Via Maritano 26, 20097 S. Donato (MI), Italy, and Eniricerche s. p. a., Via Maritano 26, 20097 S. Donato (MI), Italy
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Effect of substituents on the photochromism of a spiro[indoline-napthoxazine] under laser excitation. J Photochem Photobiol A Chem 1995. [DOI: 10.1016/1010-6030(95)04110-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Schwartz BJ, King JC, Zhang JZ, Harris CB. Direct femtosecond measurements of single collision dominated geminate recombination times of small molecules in liquids. Chem Phys Lett 1993. [DOI: 10.1016/0009-2614(93)85300-d] [Citation(s) in RCA: 100] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Laser photolysis studies of photochromic processes in spirooxazines: solvent effects on photomerocyanine behavior. J Photochem Photobiol A Chem 1992. [DOI: 10.1016/1010-6030(92)85121-a] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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