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Light-induced linear dichroism in photoreversibly photochromic sensor pigments 1. Theory

Björn, Lars Olof LU (1981) In Photochemistry and Photobiology 33(5). p.707-711
Abstract
With a photoreversibly photochromic regulator pigment such as phytochrome, linear action dichroism could theoretically be obtained after photoselection even if the molecules are initially randomly oriented. If randomly oriented Pr (red-absorbing phytochrome) (plant photoregulators) molecules are partially converted to Pfr (far-red absorbing phytochrome) molecules by plane-polarized red light, those molecules will preferentially be converted which have their red transition moments nearly parallel to the electric vector of the red light. The effect of subsequent plane-polarized far-red light will depend on the plane of polarization. A general theory is developed for how this can be used to determine whether or not the transition moment... (More)
With a photoreversibly photochromic regulator pigment such as phytochrome, linear action dichroism could theoretically be obtained after photoselection even if the molecules are initially randomly oriented. If randomly oriented Pr (red-absorbing phytochrome) (plant photoregulators) molecules are partially converted to Pfr (far-red absorbing phytochrome) molecules by plane-polarized red light, those molecules will preferentially be converted which have their red transition moments nearly parallel to the electric vector of the red light. The effect of subsequent plane-polarized far-red light will depend on the plane of polarization. A general theory is developed for how this can be used to determine whether or not the transition moment changes direction during conversion. The pigment need not be isolated, since only physiological reactions (such as germination or chromatic adaptation) are measured. (Less)
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organization
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Contribution to journal
publication status
published
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in
Photochemistry and Photobiology
volume
33
issue
5
pages
707 - 711
publisher
American Society for Photobiology
ISSN
0031-8655
language
English
LU publication?
yes
id
7e2a4709-a85d-4c56-9639-fb142dfb700f (old id 134630)
date added to LUP
2007-07-30 10:50:56
date last changed
2016-04-15 19:13:57
@article{7e2a4709-a85d-4c56-9639-fb142dfb700f,
  abstract     = {With a photoreversibly photochromic regulator pigment such as phytochrome, linear action dichroism could theoretically be obtained after photoselection even if the molecules are initially randomly oriented. If randomly oriented Pr (red-absorbing phytochrome) (plant photoregulators) molecules are partially converted to Pfr (far-red absorbing phytochrome) molecules by plane-polarized red light, those molecules will preferentially be converted which have their red transition moments nearly parallel to the electric vector of the red light. The effect of subsequent plane-polarized far-red light will depend on the plane of polarization. A general theory is developed for how this can be used to determine whether or not the transition moment changes direction during conversion. The pigment need not be isolated, since only physiological reactions (such as germination or chromatic adaptation) are measured.},
  author       = {Björn, Lars Olof},
  issn         = {0031-8655},
  language     = {eng},
  number       = {5},
  pages        = {707--711},
  publisher    = {American Society for Photobiology},
  series       = {Photochemistry and Photobiology},
  title        = {Light-induced linear dichroism in photoreversibly photochromic sensor pigments 1. Theory},
  volume       = {33},
  year         = {1981},
}