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Vibronic Excitons in Molecular Systems

Andersson, Andreas LU (2012) KEMR19 20112
Department of Chemistry
Abstract
Absorption and emission of photons by any molecule is strongly in
uenced by the molecular environment. When several chromophores are packed together
their spectral properties are known to be altered and this is canonically ex-
plained by quantum theory as electromagnetic interactions between the dipole
moments. If the interaction is strong, the absorption process might be best
described as the creation of a so-called exciton. These are not fully understood,
especially not in biologically relevant systems. In addition, electronic transitions
are in some molecules accompanied by vibrational transitions by such a high
probability that these cannot be neglected. Models including these eects have
not been used for many systems so far.... (More)
Absorption and emission of photons by any molecule is strongly in
uenced by the molecular environment. When several chromophores are packed together
their spectral properties are known to be altered and this is canonically ex-
plained by quantum theory as electromagnetic interactions between the dipole
moments. If the interaction is strong, the absorption process might be best
described as the creation of a so-called exciton. These are not fully understood,
especially not in biologically relevant systems. In addition, electronic transitions
are in some molecules accompanied by vibrational transitions by such a high
probability that these cannot be neglected. Models including these eects have
not been used for many systems so far. The peridinin-binding protein complex
PCP is an interesting system for exciton investigations but the vibrational
coupling in carotenoids need to be accounted for. The present work deals with
this problem in PCP. (Less)
Please use this url to cite or link to this publication:
author
Andersson, Andreas LU
supervisor
organization
course
KEMR19 20112
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Kemisk fysik
language
English
id
2862852
date added to LUP
2012-08-14 14:09:33
date last changed
2012-08-14 14:09:33
@misc{2862852,
  abstract     = {Absorption and emission of photons by any molecule is strongly in
uenced by the molecular environment. When several chromophores are packed together
their spectral properties are known to be altered and this is canonically ex-
plained by quantum theory as electromagnetic interactions between the dipole
moments. If the interaction is strong, the absorption process might be best
described as the creation of a so-called exciton. These are not fully understood,
especially not in biologically relevant systems. In addition, electronic transitions
are in some molecules accompanied by vibrational transitions by such a high
probability that these cannot be neglected. Models including these eects have
not been used for many systems so far. The peridinin-binding protein complex
PCP is an interesting system for exciton investigations but the vibrational
coupling in carotenoids need to be accounted for. The present work deals with
this problem in PCP.},
  author       = {Andersson, Andreas},
  keyword      = {Kemisk fysik},
  language     = {eng},
  note         = {Student Paper},
  title        = {Vibronic Excitons in Molecular Systems},
  year         = {2012},
}