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Time-Resolved Spectroelectrochemical Dynamics of Carotenoid 8’-apo-β-Carotenal

Keşan, Gürkan ; Özcan, Emrah ; Chábera, Pavel LU ; Polívka, Tomáš and Fuciman, Marcel (2023) In ChemPlusChem 88(11).
Abstract

This work examines the influence of applied external voltage in bulk electrolysis on the excited-state properties of 8′-apo-β-carotenal in acetonitrile by steady-state and ultrafast time-resolved absorption spectroscopy. The data collected under bulk electrolysis were compared with those taken without applied voltage. The steady-state measurements showed that although intensity of the S0-S2 absorption band varies with the applied voltage, the spectral position remain nearly constant. Comparison of transient absorption spectra shows that the magnitude of the ICT-like band decreases during the experiment under applied voltage condition, and is associated with a prolongation of the S1/ICT-like lifetime from... (More)

This work examines the influence of applied external voltage in bulk electrolysis on the excited-state properties of 8′-apo-β-carotenal in acetonitrile by steady-state and ultrafast time-resolved absorption spectroscopy. The data collected under bulk electrolysis were compared with those taken without applied voltage. The steady-state measurements showed that although intensity of the S0-S2 absorption band varies with the applied voltage, the spectral position remain nearly constant. Comparison of transient absorption spectra shows that the magnitude of the ICT-like band decreases during the experiment under applied voltage condition, and is associated with a prolongation of the S1/ICT-like lifetime from 8 ps to 13 ps. Furthermore, switching off the applied voltage resulted in returning to no-voltage data within about 30 min. Our results show that the amplitude of the signal associated with the ICT state can be tuned by applying an external voltage.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
8’-apo-β-carotenal, carotenoid, cyclic voltammetry, spectroelectrochemistry, transient absorption
in
ChemPlusChem
volume
88
issue
11
article number
e202300404
publisher
Institute of Organic Chemistry and Biochemistry
external identifiers
  • pmid:37747302
  • scopus:85173747969
ISSN
2192-6506
DOI
10.1002/cplu.202300404
language
English
LU publication?
yes
id
ff22a3af-c586-4901-8205-0166f543c5b1
date added to LUP
2024-01-11 15:21:10
date last changed
2024-04-26 11:07:00
@article{ff22a3af-c586-4901-8205-0166f543c5b1,
  abstract     = {{<p>This work examines the influence of applied external voltage in bulk electrolysis on the excited-state properties of 8′-apo-β-carotenal in acetonitrile by steady-state and ultrafast time-resolved absorption spectroscopy. The data collected under bulk electrolysis were compared with those taken without applied voltage. The steady-state measurements showed that although intensity of the S<sub>0</sub>-S<sub>2</sub> absorption band varies with the applied voltage, the spectral position remain nearly constant. Comparison of transient absorption spectra shows that the magnitude of the ICT-like band decreases during the experiment under applied voltage condition, and is associated with a prolongation of the S<sub>1</sub>/ICT-like lifetime from 8 ps to 13 ps. Furthermore, switching off the applied voltage resulted in returning to no-voltage data within about 30 min. Our results show that the amplitude of the signal associated with the ICT state can be tuned by applying an external voltage.</p>}},
  author       = {{Keşan, Gürkan and Özcan, Emrah and Chábera, Pavel and Polívka, Tomáš and Fuciman, Marcel}},
  issn         = {{2192-6506}},
  keywords     = {{8’-apo-β-carotenal; carotenoid; cyclic voltammetry; spectroelectrochemistry; transient absorption}},
  language     = {{eng}},
  number       = {{11}},
  publisher    = {{Institute of Organic Chemistry and Biochemistry}},
  series       = {{ChemPlusChem}},
  title        = {{Time-Resolved Spectroelectrochemical Dynamics of Carotenoid 8’-apo-β-Carotenal}},
  url          = {{http://dx.doi.org/10.1002/cplu.202300404}},
  doi          = {{10.1002/cplu.202300404}},
  volume       = {{88}},
  year         = {{2023}},
}