Universität zu Köln

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:	Creators Email ORCID ORCID Put Code Arpin, Paul C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Turner, Daniel B. UNSPECIFIED UNSPECIFIED UNSPECIFIED McClure, Scott D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jumper, Chanelle C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mirkovic, Tihana UNSPECIFIED UNSPECIFIED UNSPECIFIED Challa, J. Reddy UNSPECIFIED UNSPECIFIED UNSPECIFIED Lee, Joohyun UNSPECIFIED UNSPECIFIED UNSPECIFIED Teng, Chang Ying UNSPECIFIED UNSPECIFIED UNSPECIFIED Green, Beverley R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wilk, Krystyna E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Curmi, Paul M. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hoef-Emden, Kerstin UNSPECIFIED UNSPECIFIED UNSPECIFIED McCamant, David W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Scholes, Gregory D. UNSPECIFIED UNSPECIFIED UNSPECIFIED
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:	Keywords Language STIMULATED RAMAN-SPECTROSCOPY; ENERGY-TRANSFER; QUANTUM COHERENCE; FEMTOSECOND; EXCITATION; DYNAMICS; RESONANCE; SYSTEM; PHASE; PHYCOCYANIN Multiple languages Chemistry, Physical Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/39659