skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effect of the solvent environment on the spectroscopic properties and dynamics of the lowest excited states of carotenoids

Abstract

The spectroscopic properties and dynamics of the lowest excited singlet states of peridinin, fucoxanthin, neoxanthin, uriolide acetate, spheroidene, and spheroidenone in several different solvents have been studied by steady-state absorption and fast-transient optical spectroscopic techniques. Peridinin, fucoxanthin, uriolide acetate, and spheroidenone, which contain carbonyl functional groups in conjugation with the carbon-carbon {pi}-electron system, display broader absorption spectral features and are affected more by the solvent environment than neoxanthin and spheroidene, which do not contain carbonyl functional groups. The possible sources of the spectral broadening are explored by examining the absorption spectra at 77 K in glassy solvents. Also, carotenoids which contain carbonyls have complex transient absorption spectra and show a pronounced dependence of the excited singlet state lifetime on the solvent environment. It is postulated that these effects are related to the presence of an intramolecular charge transfer state strongly coupled to the S{sub 1} (2{sup 1}A{sub g}) excited singlet state. Structural variations in the series of carotenoids studied here make it possible to focus on the general molecular features that control the spectroscopic and dynamic properties of carotenoids.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Univ. of Connecticut, Storrs, CT (US)
Sponsoring Org.:
National Science Foundation (NSF); USDOE
OSTI Identifier:
20075920
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical
Additional Journal Information:
Journal Volume: 104; Journal Issue: 18; Other Information: PBD: 11 May 2000; Journal ID: ISSN 1089-5647
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 14 SOLAR ENERGY; CAROTENOIDS; EXCITED STATES; SPECTROSCOPY; DYNAMICS; CARBONYLS; SOLVENTS; PHOTOCHEMISTRY

Citation Formats

Frank, H.A., Bautista, J.A., Josue, J., Pendon, Z., Hiller, R.G., Sharples, F.P., Gosztola, D., and Wasielewski, M.R. Effect of the solvent environment on the spectroscopic properties and dynamics of the lowest excited states of carotenoids. United States: N. p., 2000. Web. doi:10.1021/jp000079u.
Frank, H.A., Bautista, J.A., Josue, J., Pendon, Z., Hiller, R.G., Sharples, F.P., Gosztola, D., & Wasielewski, M.R. Effect of the solvent environment on the spectroscopic properties and dynamics of the lowest excited states of carotenoids. United States. doi:10.1021/jp000079u.
Frank, H.A., Bautista, J.A., Josue, J., Pendon, Z., Hiller, R.G., Sharples, F.P., Gosztola, D., and Wasielewski, M.R. Thu . "Effect of the solvent environment on the spectroscopic properties and dynamics of the lowest excited states of carotenoids". United States. doi:10.1021/jp000079u.
@article{osti_20075920,
title = {Effect of the solvent environment on the spectroscopic properties and dynamics of the lowest excited states of carotenoids},
author = {Frank, H.A. and Bautista, J.A. and Josue, J. and Pendon, Z. and Hiller, R.G. and Sharples, F.P. and Gosztola, D. and Wasielewski, M.R.},
abstractNote = {The spectroscopic properties and dynamics of the lowest excited singlet states of peridinin, fucoxanthin, neoxanthin, uriolide acetate, spheroidene, and spheroidenone in several different solvents have been studied by steady-state absorption and fast-transient optical spectroscopic techniques. Peridinin, fucoxanthin, uriolide acetate, and spheroidenone, which contain carbonyl functional groups in conjugation with the carbon-carbon {pi}-electron system, display broader absorption spectral features and are affected more by the solvent environment than neoxanthin and spheroidene, which do not contain carbonyl functional groups. The possible sources of the spectral broadening are explored by examining the absorption spectra at 77 K in glassy solvents. Also, carotenoids which contain carbonyls have complex transient absorption spectra and show a pronounced dependence of the excited singlet state lifetime on the solvent environment. It is postulated that these effects are related to the presence of an intramolecular charge transfer state strongly coupled to the S{sub 1} (2{sup 1}A{sub g}) excited singlet state. Structural variations in the series of carotenoids studied here make it possible to focus on the general molecular features that control the spectroscopic and dynamic properties of carotenoids.},
doi = {10.1021/jp000079u},
journal = {Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical},
issn = {1089-5647},
number = 18,
volume = 104,
place = {United States},
year = {2000},
month = {5}
}