Coherent oscillations in the PC577 cryptophyte antenna occur in the excited electronic state

Scott D. McClure; Daniel B. Turner; Paul C. Arpin; Tihana Mirkovic; Gregory D. Scholes

doi:10.1021/jp411924c

Coherent oscillations in the PC577 cryptophyte antenna occur in the excited electronic state

Scott D. McClure, Daniel B. Turner, Paul C. Arpin, Tihana Mirkovic, Gregory D. Scholes

Research output: Contribution to journal › Article › peer-review

84 Scopus citations

Abstract

Transient absorption spectroscopy is a useful measurement for investigating ultrafast dynamics in molecules. We have developed a transient absorption spectrometer that utilizes balanced and fast detection methods to suppress noise and maintain high temporal and spectral resolution. We use the spectrometer to investigate the ultrafast dynamics in a photosynthetic pigment-protein complex, the phycobiliprotein PC577 isolated from the cryptophyte alga Hemiselmis pacifica CCMP706. We analyze coherent oscillations in the transient absorption data and attribute them to vibrational coherences. Analysis of the dynamic Stokes shift and motion of the wave packet on the potential-energy surface indicate that the coherences arise from vibrational wave packets in the excited electronic state of the protein.

Original language	English (US)
Pages (from-to)	1296-1308
Number of pages	13
Journal	Journal of Physical Chemistry B
Volume	118
Issue number	5
DOIs	https://doi.org/10.1021/jp411924c
State	Published - Feb 6 2014
Externally published	Yes

All Science Journal Classification (ASJC) codes

Materials Chemistry
Surfaces, Coatings and Films
Physical and Theoretical Chemistry

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10.1021/jp411924c

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title = "Coherent oscillations in the PC577 cryptophyte antenna occur in the excited electronic state",

abstract = "Transient absorption spectroscopy is a useful measurement for investigating ultrafast dynamics in molecules. We have developed a transient absorption spectrometer that utilizes balanced and fast detection methods to suppress noise and maintain high temporal and spectral resolution. We use the spectrometer to investigate the ultrafast dynamics in a photosynthetic pigment-protein complex, the phycobiliprotein PC577 isolated from the cryptophyte alga Hemiselmis pacifica CCMP706. We analyze coherent oscillations in the transient absorption data and attribute them to vibrational coherences. Analysis of the dynamic Stokes shift and motion of the wave packet on the potential-energy surface indicate that the coherences arise from vibrational wave packets in the excited electronic state of the protein.",

author = "McClure, {Scott D.} and Turner, {Daniel B.} and Arpin, {Paul C.} and Tihana Mirkovic and Scholes, {Gregory D.}",

year = "2014",

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doi = "10.1021/jp411924c",

language = "English (US)",

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T1 - Coherent oscillations in the PC577 cryptophyte antenna occur in the excited electronic state

AU - McClure, Scott D.

AU - Turner, Daniel B.

AU - Arpin, Paul C.

AU - Mirkovic, Tihana

AU - Scholes, Gregory D.

PY - 2014/2/6

Y1 - 2014/2/6

N2 - Transient absorption spectroscopy is a useful measurement for investigating ultrafast dynamics in molecules. We have developed a transient absorption spectrometer that utilizes balanced and fast detection methods to suppress noise and maintain high temporal and spectral resolution. We use the spectrometer to investigate the ultrafast dynamics in a photosynthetic pigment-protein complex, the phycobiliprotein PC577 isolated from the cryptophyte alga Hemiselmis pacifica CCMP706. We analyze coherent oscillations in the transient absorption data and attribute them to vibrational coherences. Analysis of the dynamic Stokes shift and motion of the wave packet on the potential-energy surface indicate that the coherences arise from vibrational wave packets in the excited electronic state of the protein.

AB - Transient absorption spectroscopy is a useful measurement for investigating ultrafast dynamics in molecules. We have developed a transient absorption spectrometer that utilizes balanced and fast detection methods to suppress noise and maintain high temporal and spectral resolution. We use the spectrometer to investigate the ultrafast dynamics in a photosynthetic pigment-protein complex, the phycobiliprotein PC577 isolated from the cryptophyte alga Hemiselmis pacifica CCMP706. We analyze coherent oscillations in the transient absorption data and attribute them to vibrational coherences. Analysis of the dynamic Stokes shift and motion of the wave packet on the potential-energy surface indicate that the coherences arise from vibrational wave packets in the excited electronic state of the protein.

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JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

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Coherent oscillations in the PC577 cryptophyte antenna occur in the excited electronic state

Abstract

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