Quadrupole parameters of nitrogen nuclei in the cation radical P.+700 determined by ESEEM of single crystals of photosystem I

H. Käß; P. Fromme; W. Lubitz

doi:10.1016/0009-2614(96)00533-7

Quadrupole parameters of nitrogen nuclei in the cation radical P^.+₇₀₀ determined by ESEEM of single crystals of photosystem I

H. Käß, P. Fromme, W. Lubitz

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Abstract

The cation radical of the primary donor P₇₀₀ of photosystem I (PS I) is investigated by ESEEM on single crystals of PS I from the cyanobacterium Synechococcus elongatus. The nuclear quadrupole parameters Κ and η of five different ¹⁴N nuclei are determined and ¹⁴N hyperfine couplings (hfc's) of P^.+₇₀₀ are evaluated. For comparison the cation of methyl-chlorophyllide a is studied in frozen solution. The ¹⁴N hfc data agree with published results for the ¹⁵N-labeled cation radicals of P₇₀₀ and chlorophyll a and are discussed in terms of a chlorophyll a dimer model for the cation radical P^.+₇₀₀.

Original language	English (US)
Pages (from-to)	197-206
Number of pages	10
Journal	Chemical Physics Letters
Volume	257
Issue number	1-2
DOIs	https://doi.org/10.1016/0009-2614(96)00533-7
State	Published - Jul 19 1996
Externally published	Yes

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General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "Quadrupole parameters of nitrogen nuclei in the cation radical P.+700 determined by ESEEM of single crystals of photosystem I",

abstract = "The cation radical of the primary donor P700 of photosystem I (PS I) is investigated by ESEEM on single crystals of PS I from the cyanobacterium Synechococcus elongatus. The nuclear quadrupole parameters Κ and η of five different 14N nuclei are determined and 14N hyperfine couplings (hfc's) of P.+700 are evaluated. For comparison the cation of methyl-chlorophyllide a is studied in frozen solution. The 14N hfc data agree with published results for the 15N-labeled cation radicals of P700 and chlorophyll a and are discussed in terms of a chlorophyll a dimer model for the cation radical P.+700.",

author = "H. K{\"a}{\ss} and P. Fromme and W. Lubitz",

year = "1996",

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doi = "10.1016/0009-2614(96)00533-7",

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T1 - Quadrupole parameters of nitrogen nuclei in the cation radical P.+700 determined by ESEEM of single crystals of photosystem I

AU - Käß, H.

AU - Fromme, P.

AU - Lubitz, W.

PY - 1996/7/19

Y1 - 1996/7/19

N2 - The cation radical of the primary donor P700 of photosystem I (PS I) is investigated by ESEEM on single crystals of PS I from the cyanobacterium Synechococcus elongatus. The nuclear quadrupole parameters Κ and η of five different 14N nuclei are determined and 14N hyperfine couplings (hfc's) of P.+700 are evaluated. For comparison the cation of methyl-chlorophyllide a is studied in frozen solution. The 14N hfc data agree with published results for the 15N-labeled cation radicals of P700 and chlorophyll a and are discussed in terms of a chlorophyll a dimer model for the cation radical P.+700.

AB - The cation radical of the primary donor P700 of photosystem I (PS I) is investigated by ESEEM on single crystals of PS I from the cyanobacterium Synechococcus elongatus. The nuclear quadrupole parameters Κ and η of five different 14N nuclei are determined and 14N hyperfine couplings (hfc's) of P.+700 are evaluated. For comparison the cation of methyl-chlorophyllide a is studied in frozen solution. The 14N hfc data agree with published results for the 15N-labeled cation radicals of P700 and chlorophyll a and are discussed in terms of a chlorophyll a dimer model for the cation radical P.+700.

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JO - Chemical Physics Letters

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Quadrupole parameters of nitrogen nuclei in the cation radical P^.+₇₀₀ determined by ESEEM of single crystals of photosystem I

Abstract

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