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Zeitschrift für Naturforschung B

A Journal of Chemical Sciences


IMPACT FACTOR 2018: 0.961

CiteScore 2018: 0.91

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1865-7117
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Volume 60, Issue 1

Issues

Photoswitching of Redox Potentials and Spectroscopic Properties in the UV/vis Region

Nedko Drebov
  • University of Sofia, Faculty of Chemistry, Chair of Physical Chemistry, 1 J. Bourchier blvd, BG-1126 Sofia, Bulgaria
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/ Nikolai Tyutyulkov
  • University of Sofia, Faculty of Chemistry, Chair of Physical Chemistry, 1 J. Bourchier blvd, BG-1126 Sofia, Bulgaria
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/ Stojan Karabunarliev
  • University of Houston, Department of Chemistry, 136 Fleming Building, Houston, TX 77204-5003, USA
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/ Fritz Dietz
  • Universität Leipzig, Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Johannisallee 29, D-04103 Leipzig, Germany
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Published Online: 2014-06-02 | DOI: https://doi.org/10.1515/znb-2005-0112

The photoswitching of optical and electrochemical properties of di-donor, di-acceptor and donor-acceptor substituted photochromic tetrahydropyrene - [2,2]metacyclophanene and dihydropyrene - [2,2]metacyclophanediene systems has been studied theoretically. A switching of the halfwave oxidation and reduction potentials should be possible in the case of bis(pyridinium) and bis(hydroxyphenyl) substituted systems. Because of the relatively great perturbation of the planarity of the π-electron systems by large torsion of the substituents out of the π-electron structure of the photochromic system and the stair-like structure of the ring-opened isomer, relatively large excitation energies for CT transitions have been calculated with the AM1-CI procedure. The ring-closed structures should absorb in the visible spectral region, and the open-ring isomers should have a longest-wavelength absorption in the UV region.

Keywords: Photoswitching; Redox Properties; Absorption spectra in UV/vis

About the article

Received: 2004-04-27

Published Online: 2014-06-02

Published in Print: 2005-01-01


Citation Information: Zeitschrift für Naturforschung B, Volume 60, Issue 1, Pages 75–82, ISSN (Online) 1865-7117, ISSN (Print) 0932-0776, DOI: https://doi.org/10.1515/znb-2005-0112.

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© 1946 – 2014: Verlag der Zeitschrift für Naturforschung. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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