Spectroscopic Studies of Cryptophyte Light Harvesting Proteins: Vibrations and Coherent Oscillations

Paul C. Arpin, Daniel Turner, Scott D. McClure, Chanelle C. Jumper, Tihana Mirkovic, J. Reddy Challa, Joohyun Lee, Chang Ying Teng, Beverley R. Green, Krystyna E. Wilk, Paul M G Curmi, Kerstin Hoef-Emden, David W. McCamant, Gregory D. Scholes

Research output: Contribution to journalArticle

Abstract

The first step of photosynthesis is the absorption of light by antenna complexes. Recent studies of light-harvesting complexes using two-dimensional electronic spectroscopy have revealed interesting coherent oscillations. Some contributions to those coherences are assigned to electronic coherence and therefore have implications for theories of energy transfer. To assign these femtosecond data and to gain insight into the interplay among electronic and vibrational resonances, we need detailed information on vibrations and coherences in the excited electronic state compared to the ground electronic state. Here, we used broad-band transient absorption and femtosecond stimulated Raman spectroscopies to record ground- and excited-state coherences in four related photosynthetic proteins: PC577 from Hemiselmis pacifica CCMP706, PC612 from Hemiselmis virescens CCAC 1635 B, PC630 from Chroomonas CCAC 1627 B (marine), and PC645 from Chroomonas mesostigmatica CCMP269. Two of those proteins (PC630 and PC645) have strong electronic coupling while the other two proteins (PC577 and PC612) have weak electronic coupling between the chromophores. We report vibrational spectra for the ground and excited electronic states of these complexes as well as an analysis of coherent oscillations observed in the broad-band transient absorption data.

Original languageEnglish (US)
Pages (from-to)10025-10034
Number of pages10
JournalJournal of Physical Chemistry B
Volume119
Issue number31
DOIs
StatePublished - Aug 6 2015

Fingerprint

Electronic states
proteins
Proteins
vibration
oscillations
electronics
Photosynthesis
Vibrational spectra
Chromophores
Excited states
Energy transfer
Ground state
Vibrations (mechanical)
Raman spectroscopy
Spectroscopy
Antennas
broadband
photosynthesis
vibrational spectra
chromophores

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Chemistry
  • Surfaces, Coatings and Films

Cite this

Arpin, P. C., Turner, D., McClure, S. D., Jumper, C. C., Mirkovic, T., Challa, J. R., ... Scholes, G. D. (2015). Spectroscopic Studies of Cryptophyte Light Harvesting Proteins: Vibrations and Coherent Oscillations. Journal of Physical Chemistry B, 119(31), 10025-10034. https://doi.org/10.1021/acs.jpcb.5b04704

Spectroscopic Studies of Cryptophyte Light Harvesting Proteins : Vibrations and Coherent Oscillations. / Arpin, Paul C.; Turner, Daniel; McClure, Scott D.; Jumper, Chanelle C.; Mirkovic, Tihana; Challa, J. Reddy; Lee, Joohyun; Teng, Chang Ying; Green, Beverley R.; Wilk, Krystyna E.; Curmi, Paul M G; Hoef-Emden, Kerstin; McCamant, David W.; Scholes, Gregory D.

In: Journal of Physical Chemistry B, Vol. 119, No. 31, 06.08.2015, p. 10025-10034.

Research output: Contribution to journalArticle

Arpin, PC, Turner, D, McClure, SD, Jumper, CC, Mirkovic, T, Challa, JR, Lee, J, Teng, CY, Green, BR, Wilk, KE, Curmi, PMG, Hoef-Emden, K, McCamant, DW & Scholes, GD 2015, 'Spectroscopic Studies of Cryptophyte Light Harvesting Proteins: Vibrations and Coherent Oscillations', Journal of Physical Chemistry B, vol. 119, no. 31, pp. 10025-10034. https://doi.org/10.1021/acs.jpcb.5b04704
Arpin, Paul C. ; Turner, Daniel ; McClure, Scott D. ; Jumper, Chanelle C. ; Mirkovic, Tihana ; Challa, J. Reddy ; Lee, Joohyun ; Teng, Chang Ying ; Green, Beverley R. ; Wilk, Krystyna E. ; Curmi, Paul M G ; Hoef-Emden, Kerstin ; McCamant, David W. ; Scholes, Gregory D. / Spectroscopic Studies of Cryptophyte Light Harvesting Proteins : Vibrations and Coherent Oscillations. In: Journal of Physical Chemistry B. 2015 ; Vol. 119, No. 31. pp. 10025-10034.
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