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Chang CW, Gottlieb SM, Kim PW, Rockwell NC, Lagarias JC, Larsen DS. Reactive Ground-State Pathways Are Not Ubiquitous in Red/Green Cyanobacteriochromes. J Phys Chem B 2013; 117:11229-38. [DOI: 10.1021/jp402112u] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Che-Wei Chang
- Department of Chemistry and ‡Department of
Molecular and Cellular Biology, University of California, Davis, One Shields Avenue, Davis, California
95616
| | - Sean M. Gottlieb
- Department of Chemistry and ‡Department of
Molecular and Cellular Biology, University of California, Davis, One Shields Avenue, Davis, California
95616
| | - Peter W. Kim
- Department of Chemistry and ‡Department of
Molecular and Cellular Biology, University of California, Davis, One Shields Avenue, Davis, California
95616
| | - Nathan C. Rockwell
- Department of Chemistry and ‡Department of
Molecular and Cellular Biology, University of California, Davis, One Shields Avenue, Davis, California
95616
| | - J. Clark Lagarias
- Department of Chemistry and ‡Department of
Molecular and Cellular Biology, University of California, Davis, One Shields Avenue, Davis, California
95616
| | - Delmar S. Larsen
- Department of Chemistry and ‡Department of
Molecular and Cellular Biology, University of California, Davis, One Shields Avenue, Davis, California
95616
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Hauer J, Maiuri M, Viola D, Lukes V, Henry S, Carey AM, Cogdell RJ, Cerullo G, Polli D. Explaining the temperature dependence of spirilloxanthin's S* signal by an inhomogeneous ground state model. J Phys Chem A 2013; 117:6303-10. [PMID: 23577754 PMCID: PMC3725610 DOI: 10.1021/jp4011372] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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We
investigate the nature of the S* excited state in carotenoids by performing
a series of pump–probe experiments with sub-20 fs time resolution
on spirilloxanthin in a polymethyl-methacrylate matrix varying the
sample temperature. Following photoexcitation, we observe sub-200
fs internal conversion of the bright S2 state into the
lower-lying S1 and S* states, which in turn relax to the
ground state on a picosecond time scale. Upon cooling down the sample
to 77 K, we observe a systematic decrease of the S*/S1 ratio.
This result can be explained by assuming two thermally populated ground
state isomers. The higher lying one generates the S* state, which
can then be effectively frozen out by cooling. These findings are
supported by quantum chemical modeling and provide strong evidence
for the existence and importance of ground state isomers in the photophysics
of carotenoids.
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Affiliation(s)
- J Hauer
- Photonics Institute, Vienna University of Technology, Gusshausstrasse 27, 1040 Vienna, Austria
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5
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Harvey PD, Stern C, Gros CP, Guilard R. Through space singlet energy transfers in light-harvesting systems and cofacial bisporphyrin dyads. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424610001702] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Recent discoveries from our research groups on the photophysics of a few cofacial bisporphyrin dyads for through space singlet and triplet energy transfers raised several important investigations about the mechanism of energy transfers and energy migration in light-harvesting devices, notably LH II, in the heavily investigated purple photosynthetic bacteria. The key feature is that for face-to-face and slipped dyads with controlled structure using rigid spacers or spacers with limited flexibilities, our fastest rates for singlet energy transfer are in the 10 × 109 s -1 (i.e. 100 ps time scale) for donor-acceptor distances of ~3.5–3.6 Å. The time scale for energy transfers between different bacteriochlorophylls, notably B800*→B850, is in the ps despite the long Mg ⋯ Mg separation (~18 Å). This short rate drastically contrasts with the well-accepted Förster theory. This review focuses on the photophysical processes and dynamics in LH II and compares these parameters with our investigated model dyads build upon octa-etio-porphyrin chromophores and rigid and semi-rigid spacers. The recently discovered role of the rhodopin glucoside (carotenoid) will be analyzed as possible relay for energy transfers, including the possibility of uphill processes at room temperature. In this context the concept of energy migration may be complemented by parallel relays and uphill processes. It is also becoming more obvious that the irreversible electron transfer at the reaction center (electron transfer from the special pair to the phaeophytin) renders the rates for energy transfer and migration faster precluding all possibility of back transfers.
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Affiliation(s)
- Pierre D. Harvey
- Département de Chimie, Université de Sherbrooke, Sherbrooke J1K 2R1, Québec, Canada
| | - Christine Stern
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB, UMR 5260), 9 Avenue Alain Savary, BP 47870, 21078 Dijon Cedex, France
| | - Claude P. Gros
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB, UMR 5260), 9 Avenue Alain Savary, BP 47870, 21078 Dijon Cedex, France
| | - Roger Guilard
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB, UMR 5260), 9 Avenue Alain Savary, BP 47870, 21078 Dijon Cedex, France
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6
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Jailaubekov AE, Vengris M, Song SH, Kusumoto T, Hashimoto H, Larsen DS. Deconstructing the Excited-State Dynamics of β-Carotene in Solution. J Phys Chem A 2011; 115:3905-16. [DOI: 10.1021/jp1082906] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Askat E. Jailaubekov
- Department of Chemistry, University of California Davis, One Shields Avenue, Davis, California 95616, United States
| | - Mikas Vengris
- Quantum Electronics Department, Faculty of Physics, Vilnius University, Sauletekio 10, LT10223 Vilnius, Lithuania
| | - Sang-Hun Song
- Department of Chemistry, University of California Davis, One Shields Avenue, Davis, California 95616, United States
| | - Toshiyuki Kusumoto
- Department of Physics and CREST/JST, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Hideki Hashimoto
- Department of Physics and CREST/JST, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Delmar S. Larsen
- Department of Chemistry, University of California Davis, One Shields Avenue, Davis, California 95616, United States
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9
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Polívka T, Frank HA, Enriquez MM, Niedzwiedzki DM, Liaaen-Jensen S, Hemming J, Helliwell JR, Helliwell M. X-ray Crystal Structure and Time-Resolved Spectroscopy of the Blue Carotenoid Violerythrin. J Phys Chem B 2010; 114:8760-9. [DOI: 10.1021/jp101296a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tomáš Polívka
- Institute of Physical Biology, University of South Bohemia, 373-33 Nove Hrady, Czech Republic, Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway, School of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom, and Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Czech Republic
| | - Harry A. Frank
- Institute of Physical Biology, University of South Bohemia, 373-33 Nove Hrady, Czech Republic, Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway, School of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom, and Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Czech Republic
| | - Miriam M. Enriquez
- Institute of Physical Biology, University of South Bohemia, 373-33 Nove Hrady, Czech Republic, Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway, School of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom, and Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Czech Republic
| | - Dariusz M. Niedzwiedzki
- Institute of Physical Biology, University of South Bohemia, 373-33 Nove Hrady, Czech Republic, Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway, School of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom, and Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Czech Republic
| | - Synnøve Liaaen-Jensen
- Institute of Physical Biology, University of South Bohemia, 373-33 Nove Hrady, Czech Republic, Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway, School of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom, and Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Czech Republic
| | - Joanna Hemming
- Institute of Physical Biology, University of South Bohemia, 373-33 Nove Hrady, Czech Republic, Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway, School of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom, and Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Czech Republic
| | - John R. Helliwell
- Institute of Physical Biology, University of South Bohemia, 373-33 Nove Hrady, Czech Republic, Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway, School of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom, and Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Czech Republic
| | - Madeleine Helliwell
- Institute of Physical Biology, University of South Bohemia, 373-33 Nove Hrady, Czech Republic, Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway, School of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom, and Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Czech Republic
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12
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Harvey PD, Stern C, Gros CP, Guilard R. Comments on the through-space singlet energy transfers and energy migration (exciton) in the light harvesting systems. J Inorg Biochem 2007; 102:395-405. [PMID: 18160130 DOI: 10.1016/j.jinorgbio.2007.09.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2007] [Revised: 09/20/2007] [Accepted: 09/30/2007] [Indexed: 10/22/2022]
Abstract
Recent findings on the photophysical investigations of several cofacial bisporphyrin dyads for through space singlet and triplet energy transfers raised several serious questions about the mechanism of the energy transfers and energy migration in the light harvesting devices, notably LH II, in the heavily studied purple photosynthetic bacteria. The key issue is that for simple cofacial or slipped dyads with controlled geometry using rigid spacers or spacers with limited flexibilities, the fastest possible rates for singlet energy transfer for three examples are in the 10 x 10(9)s(-1) (i.e. just in the 100 ps time scale) for donor-acceptor distances approaching 3.5-3.6 A. The reported time scale for energy transfers between different bacteriochlorophylls, notably B800*-->B850, is in the picosecond time scale despite the long Mg...Mg separation of approximately 18 A. Such a short rate drastically contrasts with the well accepted Förster theory. This article reviews the modern knowledge of the structure, bacteriochlorophyll a transition moments, and photophysical processes and dynamics in LH II, and compares these parameters with the recently investigated model bisporphyrin dyads build upon octa-etio-porphyrin chromophores and rigid and semi-rigid spacers. The recently discovered role of the rhodopin glucoside residue called carotenoid will be commented as the possible relay for energy transfer, including the possibility of uphill processes at room temperature. In this context, the concept of energy migration, called exciton, may also be affected by relays and uphill processes. Also, it is becoming more and more apparent that the presence of an irreversible electron transfer reaction at the reaction center, i.e. electron transfer from the special pair to the phyophytin macrocycle and so on, renders the rates for energy transfer and migration more rapid precluding all possibility of back transfers.
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Affiliation(s)
- Pierre D Harvey
- Département de Chimie, Université de Sherbrooke, Sherbrooke, PQ, Canada J1K 2R1.
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