Chl-a triplet quenching by peridinin in H-PCP and organic solvent revealed by step-scan FTIR time-resolved spectroscopy

C. Bonetti; M. T A Alexandre; R. G. Hiller; J. T M Kennis; R. van Grondelle

doi:10.1016/j.chemphys.2008.10.001

Chl-a triplet quenching by peridinin in H-PCP and organic solvent revealed by step-scan FTIR time-resolved spectroscopy

C. Bonetti, M. T A Alexandre^*, R. G. Hiller, J. T M Kennis, R. van Grondelle

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

Triplet-state dynamics in Chl-a/Per mixtures in organic solvent and in native H-PCP were studied by means of step-scan FTIR spectroscopy. A single decay component of 10 μs was observed for the H-PCP triplet, the spectrum of which closely matches the 13 μs component of A-PCP [Alexandre et al., Biophysical Journal 93 (2007) 2118-2128], implying that in H-PCP, as in A-PCP, the peridinin triplet state is shared with Chl-a. In a mixture of Chl-a and Per in THF, TEET from ³Chl-a to ³Per proceeds in 3.5 μs followed by ³Per decay in 7 μs. Using a target analysis procedure, ³Chl-a and ³Per infrared difference spectra were obtained. The specific carbonyl frequencies of ³Per and ³Chl-a in THF confirm our assignment of their co-existence in the infrared spectra of H-PCP and A-PCP.

Original language	English
Pages (from-to)	63-69
Number of pages	7
Journal	Chemical Physics
Volume	357
Issue number	1-3
DOIs	https://doi.org/10.1016/j.chemphys.2008.10.001
Publication status	Published - 23 Feb 2009

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title = "Chl-a triplet quenching by peridinin in H-PCP and organic solvent revealed by step-scan FTIR time-resolved spectroscopy",

abstract = "Triplet-state dynamics in Chl-a/Per mixtures in organic solvent and in native H-PCP were studied by means of step-scan FTIR spectroscopy. A single decay component of 10 μs was observed for the H-PCP triplet, the spectrum of which closely matches the 13 μs component of A-PCP [Alexandre et al., Biophysical Journal 93 (2007) 2118-2128], implying that in H-PCP, as in A-PCP, the peridinin triplet state is shared with Chl-a. In a mixture of Chl-a and Per in THF, TEET from 3Chl-a to 3Per proceeds in 3.5 μs followed by 3Per decay in 7 μs. Using a target analysis procedure, 3Chl-a and 3Per infrared difference spectra were obtained. The specific carbonyl frequencies of 3Per and 3Chl-a in THF confirm our assignment of their co-existence in the infrared spectra of H-PCP and A-PCP.",

author = "C. Bonetti and Alexandre, {M. T A} and Hiller, {R. G.} and Kennis, {J. T M} and Grondelle, {R. van}",

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doi = "10.1016/j.chemphys.2008.10.001",

language = "English",

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T1 - Chl-a triplet quenching by peridinin in H-PCP and organic solvent revealed by step-scan FTIR time-resolved spectroscopy

AU - Bonetti, C.

AU - Alexandre, M. T A

AU - Hiller, R. G.

AU - Kennis, J. T M

AU - Grondelle, R. van

PY - 2009/2/23

Y1 - 2009/2/23

N2 - Triplet-state dynamics in Chl-a/Per mixtures in organic solvent and in native H-PCP were studied by means of step-scan FTIR spectroscopy. A single decay component of 10 μs was observed for the H-PCP triplet, the spectrum of which closely matches the 13 μs component of A-PCP [Alexandre et al., Biophysical Journal 93 (2007) 2118-2128], implying that in H-PCP, as in A-PCP, the peridinin triplet state is shared with Chl-a. In a mixture of Chl-a and Per in THF, TEET from 3Chl-a to 3Per proceeds in 3.5 μs followed by 3Per decay in 7 μs. Using a target analysis procedure, 3Chl-a and 3Per infrared difference spectra were obtained. The specific carbonyl frequencies of 3Per and 3Chl-a in THF confirm our assignment of their co-existence in the infrared spectra of H-PCP and A-PCP.

AB - Triplet-state dynamics in Chl-a/Per mixtures in organic solvent and in native H-PCP were studied by means of step-scan FTIR spectroscopy. A single decay component of 10 μs was observed for the H-PCP triplet, the spectrum of which closely matches the 13 μs component of A-PCP [Alexandre et al., Biophysical Journal 93 (2007) 2118-2128], implying that in H-PCP, as in A-PCP, the peridinin triplet state is shared with Chl-a. In a mixture of Chl-a and Per in THF, TEET from 3Chl-a to 3Per proceeds in 3.5 μs followed by 3Per decay in 7 μs. Using a target analysis procedure, 3Chl-a and 3Per infrared difference spectra were obtained. The specific carbonyl frequencies of 3Per and 3Chl-a in THF confirm our assignment of their co-existence in the infrared spectra of H-PCP and A-PCP.

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U2 - 10.1016/j.chemphys.2008.10.001

DO - 10.1016/j.chemphys.2008.10.001

M3 - Article

AN - SCOPUS:59649097830

SN - 0301-0104

VL - 357

SP - 63

EP - 69

JO - Chemical Physics

JF - Chemical Physics

IS - 1-3

ER -

Chl-a triplet quenching by peridinin in H-PCP and organic solvent revealed by step-scan FTIR time-resolved spectroscopy

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