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Saytashev I, Glenn R, Murashova GA, Osseiran S, Spence D, Evans CL, Dantus M. Multiphoton excited hemoglobin fluorescence and third harmonic generation for non-invasive microscopy of stored blood. BIOMEDICAL OPTICS EXPRESS 2016; 7:3449-3460. [PMID: 27699111 PMCID: PMC5030023 DOI: 10.1364/boe.7.003449] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 07/20/2016] [Accepted: 08/08/2016] [Indexed: 05/18/2023]
Abstract
Red blood cells (RBC) in two-photon excited fluorescence (TPEF) microscopy usually appear as dark disks because of their low fluorescent signal. Here we use 15fs 800nm pulses for TPEF, 45fs 1060nm pulses for three-photon excited fluorescence, and third harmonic generation (THG) imaging. We find sufficient fluorescent signal that we attribute to hemoglobin fluorescence after comparing time and wavelength resolved spectra of other expected RBC endogenous fluorophores: NADH, FAD, biliverdin, and bilirubin. We find that both TPEF and THG microscopy can be used to examine erythrocyte morphology non-invasively without breaching a blood storage bag.
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Affiliation(s)
- Ilyas Saytashev
- Department of Chemistry, Michigan State University, 578 S Shaw Ln., East Lansing, MI 48824, USA
| | - Rachel Glenn
- Department of Chemistry, Michigan State University, 578 S Shaw Ln., East Lansing, MI 48824, USA
| | - Gabrielle A. Murashova
- Department of Chemistry, Michigan State University, 578 S Shaw Ln., East Lansing, MI 48824, USA
| | - Sam Osseiran
- Harvard-MIT Division of Health Sciences and Technology, 77 Massachusetts Avenue E25-519, Cambridge, MA 02139, USA
- Wellman Center for Photomedicine, Harvard Medical School, Massachusetts General Hospital, 149 13th Street, Charlestown, MA 02129, USA
| | - Dana Spence
- Department of Chemistry, Michigan State University, 578 S Shaw Ln., East Lansing, MI 48824, USA
| | - Conor L. Evans
- Wellman Center for Photomedicine, Harvard Medical School, Massachusetts General Hospital, 149 13th Street, Charlestown, MA 02129, USA
| | - Marcos Dantus
- Department of Chemistry, Michigan State University, 578 S Shaw Ln., East Lansing, MI 48824, USA
- Department of Physics and Astronomy, Michigan State University, 567 Wilson Rd., East Lansing, MI 48824, USA
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2
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Ghosh S, Bishop MM, Roscioli JD, LaFountain AM, Frank HA, Beck WF. Femtosecond Heterodyne Transient Grating Studies of Nonradiative Deactivation of the S2 (11Bu+) State of Peridinin: Detection and Spectroscopic Assignment of an Intermediate in the Decay Pathway. J Phys Chem B 2016; 120:3601-14. [DOI: 10.1021/acs.jpcb.5b12753] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Soumen Ghosh
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322 United States
| | - Michael M. Bishop
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322 United States
| | - Jerome D. Roscioli
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322 United States
| | - Amy M. LaFountain
- Department
of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3036 United States
| | - Harry A. Frank
- Department
of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3036 United States
| | - Warren F. Beck
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322 United States
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3
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Ghosh S, Bishop MM, Roscioli JD, Mueller JJ, Shepherd NC, LaFountain AM, Frank HA, Beck WF. Femtosecond Heterodyne Transient-Grating Studies of Nonradiative Decay of the S2 (11Bu+) State of β-Carotene: Contributions from Dark Intermediates and Double-Quantum Coherences. J Phys Chem B 2015; 119:14905-24. [DOI: 10.1021/acs.jpcb.5b09405] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Soumen Ghosh
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322, United States
| | - Michael M. Bishop
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322, United States
| | - Jerome D. Roscioli
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322, United States
| | - Jenny Jo Mueller
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322, United States
| | - Nolan C. Shepherd
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322, United States
| | - Amy M. LaFountain
- Department
of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| | - Harry A. Frank
- Department
of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| | - Warren F. Beck
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322, United States
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4
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Sun Q, Zheng W, Wang J, Luo Y, Qu JY. Mechanism of two-photon excited hemoglobin fluorescence emission. JOURNAL OF BIOMEDICAL OPTICS 2015; 20:105014. [PMID: 26506468 DOI: 10.1117/1.jbo.20.10.105014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 09/30/2015] [Indexed: 05/21/2023]
Abstract
Hemoglobin, one of the most important proteins in the human body, is composed of “heme” groups (iron-containing rings) and “globins” (proteins). We investigate the two-photon excited fluorescence of hemoglobin and its subunit components (heme and globin). We measure the hemoglobin fluorescence lifetime by using a streak camera of ps resolution and confirm that its lifetime is in femtosecond scale. In the study of the fluorescence properties of heme and globin, the experimental results reveal that heme is the sole fluorophore of hemoglobin. Hemoglobin fluorescence can be effectively excited only via two-photon process, because heme has a centrosymmetric molecular structure and two-photon allowed transition is forbidden for single-photon process and vice versa due to the Laporte parity selection rule.
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Affiliation(s)
- Qiqi Sun
- Hong Kong University of Science and Technology, Department of Electronic and Computer Engineering, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Wei Zheng
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Jiannong Wang
- Hong Kong University of Science and Technology, Department of Physics, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Yi Luo
- University of Science and Technology of China, Bio-X Division, Hefei National Laboratory for Physical Science at the Microscale, Hefei, Anhui, China
| | - Jianan Y Qu
- Hong Kong University of Science and Technology, Department of Electronic and Computer Engineering, Clear Water Bay, Kowloon, Hong Kong SAR, ChinaeHong Kong University of Science and Technology, Center of Systems Biology and Human Health, School of Science
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5
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Chung JK, Thielges MC, Bowman SEJ, Bren KL, Fayer MD. Temperature dependent equilibrium native to unfolded protein dynamics and properties observed with IR absorption and 2D IR vibrational echo experiments. J Am Chem Soc 2011; 133:6681-91. [PMID: 21469666 PMCID: PMC3088310 DOI: 10.1021/ja111009s] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dynamic and structural properties of carbonmonoxy (CO)-coordinated cytochrome c(552) from Hydrogenobacter thermophilus (Ht-M61A) at different temperatures under thermal equilibrium conditions were studied with infrared absorption spectroscopy and ultrafast two-dimensional infrared (2D IR) vibrational echo experiments using the heme-bound CO as the vibrational probe. Depending on the temperature, the stretching mode of CO shows two distinct bands corresponding to the native and unfolded proteins. As the temperature is increased from low temperature, a new absorption band for the unfolded protein grows in and the native band decreases in amplitude. Both the temperature-dependent circular dichroism and the IR absorption area ratio R(A)(T), defined as the ratio of the area under the unfolded band to the sum of the areas of the native and unfolded bands, suggest a two-state transition from the native to the unfolded protein. However, it is found that the absorption spectrum of the unfolded protein increases its inhomogeneous line width and the center frequency shifts as the temperature is increased. The changes in line width and center frequency demonstrate that the unfolding does not follow simple two-state behavior. The temperature-dependent 2D IR vibrational echo experiments show that the fast dynamics of the native protein are virtually temperature independent. In contrast, the fast dynamics of the unfolded protein are slower than those of the native protein, and the unfolded protein fast dynamics and at least a portion of the slower dynamics of the unfolded protein change significantly, becoming faster as the temperature is raised. The temperature dependence of the absorption spectrum and the changes in dynamics measured with the 2D IR experiments confirm that the unfolded ensemble of conformers continuously changes its nature as unfolding proceeds, in contrast to the native state, which displays a temperature-independent distribution of structures.
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Affiliation(s)
- Jean K. Chung
- Department of Chemistry, Stanford University, Stanford, California 94305
| | - Megan C. Thielges
- Department of Chemistry, Stanford University, Stanford, California 94305
| | - Sarah E. J. Bowman
- Department of Chemistry, University of Rochester, Rochester, New York 14627
| | - Kara L. Bren
- Department of Chemistry, University of Rochester, Rochester, New York 14627
| | - M. D. Fayer
- Department of Chemistry, Stanford University, Stanford, California 94305
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6
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Nagasawa Y. Ultrafast photon echo experiments in condensed phase: Detection of solvation dynamics, coherent wavepacket motions and static inhomogeneity. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2011. [DOI: 10.1016/j.jphotochemrev.2011.05.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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7
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Zheng W, Li D, Zeng Y, Luo Y, Qu JY. Two-photon excited hemoglobin fluorescence. BIOMEDICAL OPTICS EXPRESS 2010; 2:71-9. [PMID: 21326637 PMCID: PMC3028500 DOI: 10.1364/boe.2.000071] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Revised: 12/01/2010] [Accepted: 12/02/2010] [Indexed: 05/20/2023]
Abstract
We discovered that hemoglobin emits high energy Soret fluorescence when two-photon excited by the visible femtosecond light sources. The unique spectral and temporal characteristics of hemoglobin fluorescence were measured by using a time-resolved spectroscopic detection system. The high energy Soret fluorescence of hemoglobin shows the spectral peak at 438 nm with extremely short lifetime. This discovery enables two-photon excitation fluorescence microscopy to become a potentially powerful tool for in vivo label-free imaging of blood cells and vessels.
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Affiliation(s)
- Wei Zheng
- Biomedical Engineering Program, Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong, China
- These authors contributed equally to this work
| | - Dong Li
- Biomedical Engineering Program, Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong, China
- These authors contributed equally to this work
| | - Yan Zeng
- Biomedical Engineering Program, Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong, China
| | - Yi Luo
- Bio-X Division, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jianan Y. Qu
- Biomedical Engineering Program, Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong, China
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8
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Tripathy J, Beck WF. Nanosecond-Regime Correlation Time Scales for Equilibrium Protein Structural Fluctuations of Metal-Free Cytochrome c from Picosecond Time-Resolved Fluorescence Spectroscopy and the Dynamic Stokes Shift. J Phys Chem B 2010; 114:15958-68. [DOI: 10.1021/jp1044964] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Jagnyaseni Tripathy
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Warren F. Beck
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
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9
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Ye S, Markelz A. Hydration Effects on Energy Relaxation of Ferric Cytochrome C Films after Soret-Band Photoexcitation. J Phys Chem B 2010; 114:15151-7. [DOI: 10.1021/jp104217j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Shuji Ye
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui, People’s Republic of China 230026, and Department of Physics, University at Buffalo, SUNY, 239 Fronczak Hall, Buffalo, New York 14260-1500, United States
| | - Andrea Markelz
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui, People’s Republic of China 230026, and Department of Physics, University at Buffalo, SUNY, 239 Fronczak Hall, Buffalo, New York 14260-1500, United States
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10
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Oskouei AA, Tortschanoff A, Bräm O, van Mourik F, Cannizzo A, Chergui M. Three pulse UV photon echo studies of molecules in solution: Effect of the chirp. J Chem Phys 2010; 133:064506. [DOI: 10.1063/1.3463448] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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11
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Christensson N, Dietzek B, Yartsev A, Pullerits T. Solute specific polar solvation studied by photon echo spectroscopy. Chem Phys 2009. [DOI: 10.1016/j.chemphys.2008.10.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Christensson N, Dietzek B, Yartsev A, Pullerits T. Probing the strength of the system-bath interaction by three-pulse photon echoes. J Chem Phys 2009; 130:024510. [DOI: 10.1063/1.2990652] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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13
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Kim S, Chung JK, Kwak K, Bowman SEJ, Bren KL, Bagchi B, Fayer MD. Native and unfolded cytochrome c--comparison of dynamics using 2D-IR vibrational echo spectroscopy. J Phys Chem B 2008; 112:10054-63. [PMID: 18646797 PMCID: PMC2671645 DOI: 10.1021/jp802246h] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Unfolded vs native CO-coordinated horse heart cytochrome c (h-cyt c) and a heme axial methionine mutant cyt c552 from Hydrogenobacter thermophilus ( Ht-M61A) are studied by IR absorption spectroscopy and ultrafast 2D-IR vibrational echo spectroscopy of the CO stretching mode. The unfolding is induced by guanidinium hydrochloride (GuHCl). The CO IR absorption spectra for both h-cyt c and Ht-M61A shift to the red as the GuHCl concentration is increased through the concentration region over which unfolding occurs. The spectra for the unfolded state are substantially broader than the spectra for the native proteins. A plot of the CO peak position vs GuHCl concentration produces a sigmoidal curve that overlays the concentration-dependent circular dichroism (CD) data of the CO-coordinated forms of both Ht-M61A and h-cyt c within experimental error. The coincidence of the CO peak shift curve with the CD curves demonstrates that the CO vibrational frequency is sensitive to the structural changes induced by the denaturant. 2D-IR vibrational echo experiments are performed on native Ht-M61A and on the protein in low- and high-concentration GuHCl solutions. The 2D-IR vibrational echo is sensitive to the global protein structural dynamics on time scales from subpicosecond to greater than 100 ps through the change in the shape of the 2D spectrum with time (spectral diffusion). At the high GuHCl concentration (5.1 M), at which Ht-M61A is essentially fully denatured as judged by CD, a very large reduction in dynamics is observed compared to the native protein within the approximately 100 ps time window of the experiment. The results suggest the denatured protein may be in a glassy-like state involving hydrophobic collapse around the heme.
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Affiliation(s)
- Seongheun Kim
- Department of Chemistry, Stanford University, Stanford, CA 94305
| | - Jean K. Chung
- Department of Chemistry, Stanford University, Stanford, CA 94305
| | - Kyungwon Kwak
- Department of Chemistry, Stanford University, Stanford, CA 94305
| | - Sarah E. J. Bowman
- Department of Chemistry, University of Rochester, Rochester, NY 14627-0216
| | - Kara L. Bren
- Department of Chemistry, University of Rochester, Rochester, NY 14627-0216
| | - Biman Bagchi
- Department of Chemistry, Stanford University, Stanford, CA 94305
| | - M. D. Fayer
- Department of Chemistry, Stanford University, Stanford, CA 94305
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14
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Sugisaki M, Fujii R, Cogdell RJ, Hashimoto H. Linear and nonlinear optical responses in bacteriochlorophyll a. PHOTOSYNTHESIS RESEARCH 2008; 95:309-316. [PMID: 17926140 DOI: 10.1007/s11120-007-9266-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2007] [Accepted: 09/13/2007] [Indexed: 05/25/2023]
Abstract
Nonlinear optical responses of bacteriochlorophyll a (BChl a) were investigated by means of the three-pulse four-wave mixing (FWM) technique under the resonant excitation into the Q ( y ) band. The experimental results are explained by a theoretical model calculation including the Brownian oscillation mode of the solvent. We have determined the spectral density, which is the most important function with which to calculate optical signals. The linear absorption spectrum can be reproduced fairly well when the vibronic oscillation modes of the solvent together with those of BChl a are properly taken into consideration. The FWM signal was also calculated using the spectral density. It was found that a simple two-level model could not explain the experimental result. The effect of the higher-order interactions is discussed.
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Affiliation(s)
- Mitsuru Sugisaki
- Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi, Osaka, 558-8585, Japan.
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15
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Dietzek B, Christensson N, Pascher T, Pullerits T, Yartsev A. Ultrafast Excited-State Isomerization Dynamics of 1,1‘-Diethyl-2,2‘-Cyanine Studied by Four-Wave Mixing Spectroscopy. J Phys Chem B 2007; 111:5396-404. [PMID: 17451267 DOI: 10.1021/jp0685277] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Excited-state dynamics and solvent-solute interactions of 1,1'-diethyl-2,2'-cyanine iodine (1122C) in alcoholic solutions are investigated using time-integrated three-pulse photon-echo spectroscopy. 1122C serves as a model compound for ultrafast photoinduced isomerization-a key process in the light reception of plants, bacteria, and human vision. The photoreaction in 1122C is interrogated in dependence on solvent and excitation wavelength. The wavelength-dependent three-pulse photon-echo peak shift indicates strong alterations of the reaction pathways and points to the existence of a direct internal conversion channel in close proximity to the Franck-Condon point of absorption. The solvent-dependent S1-S0 internal conversion time does not follow conventional sheared viscosity dependence, suggesting that the solvent local friction has to be considered to account for the observed isomerization kinetics. The concerted discussion of transient grating and three-pulse photon-echo peak-shift data allows us to derive a complete picture of the solvent-solute interaction-controlled photoreaction. The results obtained are related to other work on reactive systems and are discussed in the framework of multilevel response functions.
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Affiliation(s)
- Benjamin Dietzek
- Department of Chemical Physics, Lund University, P. O. Box 124, SE-22100 Lund, Sweden.
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16
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Cho BM, Carlsson CF, Jimenez R. Photon echo spectroscopy of porphyrins and heme proteins: Effects of quasidegenerate electronic structure on the peak shift decay. J Chem Phys 2006; 124:144905. [PMID: 16626243 DOI: 10.1063/1.2186318] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Three pulse photon echo peak shift spectroscopy and transient grating measurements on Zn-substituted cytochrome c, Zn-tetraphenylporphyrin, and Zn-protoporphyrin IX are reported. The effects of protein conformation, axial ligation, and solvent are investigated. Numerical simulations of the peak shift and transient grating experiments are presented. The simulations employed recently derived optical response functions for square-symmetric molecules with doubly degenerate excited states. Simulations exploring the effects of excited-state energy splitting, symmetric and asymmetric fluctuations, and excited-state lifetime show that the time scales of the peak shift decay in the three-level system largely reflect the same dynamics as in the two-level system. However, the asymptotic peak shift, which is a clear indicator of inhomogeneous broadening in a two-level system, must be interpreted more carefully for three-level systems, as it is also influenced by the magnitude of the excited-state splitting. The calculated signals qualitatively reproduce the data.
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Affiliation(s)
- Byung Moon Cho
- JILA, University of Colorado and National Institute of Standards and Technology, Boulder, Colorado 80309-0440, USA
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17
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Cho BM, Walker RC, Amer H, Mercer I, Klug DR, Gould IR. Effect of Adiabaticity on Electron Dynamics in Zinc Myoglobin. J Phys Chem B 2005; 109:5954-61. [PMID: 16851650 DOI: 10.1021/jp0470748] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Electron-vibration coupling in zinc substituted myoglobin has been calculated using a quantum mechanical/molecular mechanical method. The methodology has been tested by a direct comparison of the calculated optical observables, the steady-state optical spectra and three-pulse-photon-echo-peak-shift (3PEPS) function, to those experimentally measured showing a qualitative agreement. A range of experiments and calculations were performed to explain the discrepancies, which lead to the conclusion that the discrepancy originates from adiabatic coupling of the two nearly degenerate electronic transitions.
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Affiliation(s)
- Byung Moon Cho
- Biological and Biophysical Chemistry Group and Molecular Dynamics Group, Department of Chemistry, Imperial College London, London, U.K
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18
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Halder M, Das K, Chowdhury PK, Kundu S, Hargrove MS, Petrich JW. A Comparative Femtosecond Coherence Study of the Unligated Monomeric Hemeproteins Myoglobin and Leghemoglobin. J Phys Chem B 2003. [DOI: 10.1021/jp034828u] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Halder
- Department of Chemistry and Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, Iowa 50011
| | - K. Das
- Department of Chemistry and Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, Iowa 50011
| | - P. K. Chowdhury
- Department of Chemistry and Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, Iowa 50011
| | - S. Kundu
- Department of Chemistry and Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, Iowa 50011
| | - M. S. Hargrove
- Department of Chemistry and Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, Iowa 50011
| | - J. W. Petrich
- Department of Chemistry and Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, Iowa 50011
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