Excited state kinetics of anthracene-bridge-aniline intramolecular exciplexes.
(2014) In Photochemical and Photobiological Sciences 13(7). p.1093-1105- Abstract
- We report on the synthesis and characterization of fluorescent halogen substituted anthracene-bridge-aniline (ABA) supermolecules that undergo structural reorganization on photoexcitation to form transient complexes. The syntheses were achieved in high yields on a large scale and the molecular structures were confirmed by single crystal X-ray diffraction. The photophysics of the ABA supermolecules were investigated using steady state and time resolved optical spectroscopy. Despite the presence of heavy atoms the series of ABA molecules have high quantum yields of fluorescence from both a locally excited anthracene state (LE) and an excited state complex (exciplex, EP) in non-polar solvents. The kinetics of the excited state processes were... (More)
- We report on the synthesis and characterization of fluorescent halogen substituted anthracene-bridge-aniline (ABA) supermolecules that undergo structural reorganization on photoexcitation to form transient complexes. The syntheses were achieved in high yields on a large scale and the molecular structures were confirmed by single crystal X-ray diffraction. The photophysics of the ABA supermolecules were investigated using steady state and time resolved optical spectroscopy. Despite the presence of heavy atoms the series of ABA molecules have high quantum yields of fluorescence from both a locally excited anthracene state (LE) and an excited state complex (exciplex, EP) in non-polar solvents. The kinetics of the excited state processes were established in decalin from the time-resolved emission, and was shown to be strongly influenced by an electron-transfer state (ET). For quantitative studies of the excited state dynamics, the presence of this state required the development of a numerical three-excited-state kinetic model to replace the commonly used two-excited-state model. The experimental results shows that the reaction rates are strongly influenced both by substituents and solvent, illustrating the importance of including all relevant states in the kinetic modeling. Ultimately it is established that the excited state dynamics can conveniently be followed by optical methods, and the applicability of the system as a model system in time-resolved X-ray scattering experiments is discussed. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4529394
- author
- Thyrhaug, Erling LU ; Hammershøj, Peter ; Kjær, Kasper S ; Sørensen, Thomas Just ; Harrit, Niels H ; Nielsen, Martin M and Bechgaard, Klaus
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Photochemical and Photobiological Sciences
- volume
- 13
- issue
- 7
- pages
- 1093 - 1105
- publisher
- Royal Society of Chemistry
- external identifiers
-
- pmid:24888329
- wos:000338122300014
- scopus:84902795111
- pmid:24888329
- ISSN
- 1474-9092
- DOI
- 10.1039/c4pp00073k
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)
- id
- 517a5b37-22c3-4e4d-a65e-b25795f00c3e (old id 4529394)
- date added to LUP
- 2016-04-01 10:42:08
- date last changed
- 2022-01-26 01:41:27
@article{517a5b37-22c3-4e4d-a65e-b25795f00c3e,
abstract = {{We report on the synthesis and characterization of fluorescent halogen substituted anthracene-bridge-aniline (ABA) supermolecules that undergo structural reorganization on photoexcitation to form transient complexes. The syntheses were achieved in high yields on a large scale and the molecular structures were confirmed by single crystal X-ray diffraction. The photophysics of the ABA supermolecules were investigated using steady state and time resolved optical spectroscopy. Despite the presence of heavy atoms the series of ABA molecules have high quantum yields of fluorescence from both a locally excited anthracene state (LE) and an excited state complex (exciplex, EP) in non-polar solvents. The kinetics of the excited state processes were established in decalin from the time-resolved emission, and was shown to be strongly influenced by an electron-transfer state (ET). For quantitative studies of the excited state dynamics, the presence of this state required the development of a numerical three-excited-state kinetic model to replace the commonly used two-excited-state model. The experimental results shows that the reaction rates are strongly influenced both by substituents and solvent, illustrating the importance of including all relevant states in the kinetic modeling. Ultimately it is established that the excited state dynamics can conveniently be followed by optical methods, and the applicability of the system as a model system in time-resolved X-ray scattering experiments is discussed.}},
author = {{Thyrhaug, Erling and Hammershøj, Peter and Kjær, Kasper S and Sørensen, Thomas Just and Harrit, Niels H and Nielsen, Martin M and Bechgaard, Klaus}},
issn = {{1474-9092}},
language = {{eng}},
number = {{7}},
pages = {{1093--1105}},
publisher = {{Royal Society of Chemistry}},
series = {{Photochemical and Photobiological Sciences}},
title = {{Excited state kinetics of anthracene-bridge-aniline intramolecular exciplexes.}},
url = {{http://dx.doi.org/10.1039/c4pp00073k}},
doi = {{10.1039/c4pp00073k}},
volume = {{13}},
year = {{2014}},
}