Arpin, Paul C., Turner, Daniel B., 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. and Scholes, Gregory D. (2015). Spectroscopic Studies of Cryptophyte Light Harvesting Proteins: Vibrations and Coherent Oscillations. J. Phys. Chem. B, 119 (31). S. 10025 - 10035. WASHINGTON: AMER CHEMICAL SOC. ISSN 1520-5207

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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 CCIVIP269. Two of those proteins (PC630 and PC645)- have strong electronic coupling while the other two proteins (PC577 and PC612) hare weak electronic coupling between the chromophores. We report vibrational spectra for the gronrid and excited electronic states of these complexes as well as an analysis of coherent oscillations observed in the broadband transient absorption data.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Arpin, Paul C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Turner, Daniel B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
McClure, Scott D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jumper, Chanelle C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mirkovic, TihanaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Challa, J. ReddyUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lee, JoohyunUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Teng, Chang YingUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Green, Beverley R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wilk, Krystyna E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Curmi, Paul M. G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hoef-Emden, KerstinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
McCamant, David W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Scholes, Gregory D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-396591
DOI: 10.1021/acs.jpcb.5b04704
Journal or Publication Title: J. Phys. Chem. B
Volume: 119
Number: 31
Page Range: S. 10025 - 10035
Date: 2015
Publisher: AMER CHEMICAL SOC
Place of Publication: WASHINGTON
ISSN: 1520-5207
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
STIMULATED RAMAN-SPECTROSCOPY; ENERGY-TRANSFER; QUANTUM COHERENCE; FEMTOSECOND; EXCITATION; DYNAMICS; RESONANCE; SYSTEM; PHASE; PHYCOCYANINMultiple languages
Chemistry, PhysicalMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/39659

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