PMID- 27505442
OWN - NLM
STAT- MEDLINE
DCOM- 20180426
LR  - 20180426
IS  - 1520-5207 (Electronic)
IS  - 1520-5207 (Linking)
VI  - 120
IP  - 35
DP  - 2016 Sep 8
TI  - Bacterial Light-Harvesting Complexes Showing Giant Second-Order Nonlinear Optical 
      Response as Revealed by Hyper-Rayleigh Light Scattering.
PG  - 9395-401
LID - 10.1021/acs.jpcb.6b07461 [doi]
AB  - The second-order nonlinear optical (NLO) properties of light-harvesting complexes 
      (LHs) from the purple photosynthetic bacteria Thermochromatium (Tch.) tepidum 
      were investigated for the first time by means of hyper-Rayleigh scattering (HRS). 
      The carotenoid (Car) molecules bound to the isolated LH1 and LH2 proteins gave 
      rise to second-harmonic scattering; however, they showed an opposite effect of 
      the collective contribution from Car, that is, the first hyperpolarizability (beta) 
      reduced substantially from (10 510 +/- 370) x 10(-30) esu for LH1 to (360 +/- 120) x 
      10(-30) esu for LH2. Chromatophores of Tch. tepidum also showed a giant 
      hyperpolarizability of (11 640 +/- 630) x 10(-30) esu. On the basis of the 
      structural information on bacterial LHs, it is found that the effective beta of an 
      LH is governed by the microenvironment and orientational correlation among the 
      Car chromophores, which is concluded to be coherently enhanced for LH1. For LH2, 
      however, additional destructive effects between different Car molecules may 
      account for the small beta value. This work demonstrates that LH1 and native 
      membranes of purple bacteria can be potent NLO materials and that HRS is a 
      promising spectroscopic means for investigating structural information of 
      pigment-protein supramolecules.
FAU - Ma, Fei
AU  - Ma F
AD  - Department of Chemistry, Renmin University of China , Beijing 1000872, P. R. 
      China.
FAU - Yu, Long-Jiang
AU  - Yu LJ
AD  - Faculty of Science, Ibaraki University , Mito, Ibaraki 310-8512, Japan.
FAU - Ma, Xiao-Hua
AU  - Ma XH
AD  - Department of Chemistry, Renmin University of China , Beijing 1000872, P. R. 
      China.
FAU - Wang, Peng
AU  - Wang P
AD  - Department of Chemistry, Renmin University of China , Beijing 1000872, P. R. 
      China.
FAU - Wang-Otomo, Zheng-Yu
AU  - Wang-Otomo ZY
AD  - Faculty of Science, Ibaraki University , Mito, Ibaraki 310-8512, Japan.
FAU - Zhang, Jian-Ping
AU  - Zhang JP
AD  - Department of Chemistry, Renmin University of China , Beijing 1000872, P. R. 
      China.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20160825
PL  - United States
TA  - J Phys Chem B
JT  - The journal of physical chemistry. B
JID - 101157530
RN  - 0 (Light-Harvesting Protein Complexes)
SB  - IM
MH  - Chromatiaceae/*chemistry
MH  - *Light
MH  - Light-Harvesting Protein Complexes/*chemistry
MH  - *Scattering, Radiation
EDAT- 2016/08/10 06:00
MHDA- 2018/04/27 06:00
CRDT- 2016/08/10 06:00
PHST- 2016/08/10 06:00 [entrez]
PHST- 2016/08/10 06:00 [pubmed]
PHST- 2018/04/27 06:00 [medline]
AID - 10.1021/acs.jpcb.6b07461 [doi]
PST - ppublish
SO  - J Phys Chem B. 2016 Sep 8;120(35):9395-401. doi: 10.1021/acs.jpcb.6b07461. Epub 
      2016 Aug 25.