TY - JOUR
T1 - Third order nonlinear optical properties of bacteriochlorophylls in bacterial photosynthetic light-harvesting proteins
AU - Chen, Lin X.
AU - Laible, Philip D.
N1 - Funding Information:
The authors would like to acknowledge the support for this work by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Chemical Sciences (under Contract No. W-31-109-Eng-38). PDL acknowledges an appointment to the Alexander Hollaender Distinguished Postdoctoral Fellowship Program sponsored by the U.S. Department of Energy, Office of Health and Environmental Research, and administered by the Oak Ridge Institute for Science and Education. We also like to thank Dr. David Tiede for his LH1 samples and useful discussions, and Dr. Scott Greenfield for his help in measuring excited state decay of BChla in LH1 and LH2.
PY - 1997/5/23
Y1 - 1997/5/23
N2 - The third order hyperpolarizability, <γ>, of the ground state S0 of bacteriochlorophyll a (BChla) has been determined using degenerate four wave mixing. The <γ> for BChl a in vivo (the B875 and B850 arrays of light harvesting proteins) is enhanced relative to that in vitro (THF). A significantly higher <γ> in B875 than that in B850 suggests stronger pigment interactions in the former resulting from superior overlap of adjacent macrocycles. In addition, a 50-160 fold increase in <γ> for the S1 excited state of relative to S0 of BChl a in vivo provides an alternative method for probing excited state dynamics and a potential application for molecular switching.
AB - The third order hyperpolarizability, <γ>, of the ground state S0 of bacteriochlorophyll a (BChla) has been determined using degenerate four wave mixing. The <γ> for BChl a in vivo (the B875 and B850 arrays of light harvesting proteins) is enhanced relative to that in vitro (THF). A significantly higher <γ> in B875 than that in B850 suggests stronger pigment interactions in the former resulting from superior overlap of adjacent macrocycles. In addition, a 50-160 fold increase in <γ> for the S1 excited state of relative to S0 of BChl a in vivo provides an alternative method for probing excited state dynamics and a potential application for molecular switching.
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U2 - 10.1016/S0009-2614(97)00373-4
DO - 10.1016/S0009-2614(97)00373-4
M3 - Article
AN - SCOPUS:0031584253
SN - 0009-2614
VL - 270
SP - 255
EP - 262
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 3-4
ER -