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Lee Y, Lee M. Volume increment effect on the photoisomerization of hemicyanine dyes in oligo(ethylene glycol)s. J Phys Chem A. 2013;117(48):12878-83doi: 10.1021/jp4101043.
Lee, Y., & Lee, M. (2013). Volume increment effect on the photoisomerization of hemicyanine dyes in oligo(ethylene glycol)s. The journal of physical chemistry. A, 117(48), 12878-83. https://doi.org/10.1021/jp4101043
Lee, Youmin, and Lee, Minyung. "Volume increment effect on the photoisomerization of hemicyanine dyes in oligo(ethylene glycol)s." The journal of physical chemistry. A vol. 117,48 (2013): 12878-83. doi: https://doi.org/10.1021/jp4101043
Lee Y, Lee M. Volume increment effect on the photoisomerization of hemicyanine dyes in oligo(ethylene glycol)s. J Phys Chem A. 2013 Dec 05;117(48):12878-83. doi: 10.1021/jp4101043. Epub 2013 Nov 25. PMID: 24266422.
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J Phys Chem A. 2013 Dec 05;117(48):12878-83. doi: 10.1021/jp4101043. Epub 2013 Nov 25.

Volume increment effect on the photoisomerization of hemicyanine dyes in oligo(ethylene glycol)s.

The journal of physical chemistry. A

Youmin Lee, Minyung Lee

Affiliations

  1. Department of Chemistry and Nanoscience, Ewha Womans University , Seoul 120-750, Republic of Korea.

PMID: 24266422 DOI: 10.1021/jp4101043

Abstract

We studied the excited-state dynamics of three hemicyanine dyes that undergo internal twisting from the localized excited state to the twisted intramolecular charge-transfer state. The dyes differ in the length of the alkyl chain in the aniline moiety and, thus, the volume of the motional moiety increases without having much of an effect on the excited-state potential surface. By employing oligo(ethylene glycol)s as a new homologous series of solvents that covers a high viscosity region, we showed that the excited-state lifetime of the hemicyanines gradually increases at any given viscosity when the size of the substituent increases. We describe our results for the solution-phase photoisomerization processes in terms of the breakdown of Stokes' law, multidimensionality, and the Hubbard relation.

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