Rotational reorientation dynamics of ionic dye solutes in polar solvents with the application of a general model for the solvation shell

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7 Citations (Scopus)

Abstract

The rotational reorientation times of two cationic dyes, nile blue A and oxazine 720 have been determined in various protic and aprotic polar solvents from the picosecond decay of their transient absorption. The results have shown a good agreement with those obtained from theoretical calculations based on Stokes-Einstein-Debye theory, using a simple model for the rotating species. In this model these large closely planar solutes are treated as oblate symmetric tops, their solvent shells are represented by layers with uniform thickness of γ • 2rS, where 2rS is the diameter of the solvent molecule, and γ is a common fitting parameter for all types of solvent.

Original languageEnglish
Pages (from-to)247-253
Number of pages7
JournalChemical Physics
Volume322
Issue number3
DOIs
Publication statusPublished - Mar 20 2006

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Solvation
retraining
solvation
solutes
Coloring Agents
dyes
Oxazines
Molecules
decay
molecules

Keywords

  • Fluorescent probe
  • Hydrodynamic friction
  • Rotational diffusion
  • Solvent attachment

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

Cite this

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abstract = "The rotational reorientation times of two cationic dyes, nile blue A and oxazine 720 have been determined in various protic and aprotic polar solvents from the picosecond decay of their transient absorption. The results have shown a good agreement with those obtained from theoretical calculations based on Stokes-Einstein-Debye theory, using a simple model for the rotating species. In this model these large closely planar solutes are treated as oblate symmetric tops, their solvent shells are represented by layers with uniform thickness of γ • 2rS, where 2rS is the diameter of the solvent molecule, and γ is a common fitting parameter for all types of solvent.",
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T1 - Rotational reorientation dynamics of ionic dye solutes in polar solvents with the application of a general model for the solvation shell

AU - Kubinyi, M.

AU - Grofcsik, A.

AU - Kárpáti, T.

AU - Jones, W. Jeremy

PY - 2006/3/20

Y1 - 2006/3/20

N2 - The rotational reorientation times of two cationic dyes, nile blue A and oxazine 720 have been determined in various protic and aprotic polar solvents from the picosecond decay of their transient absorption. The results have shown a good agreement with those obtained from theoretical calculations based on Stokes-Einstein-Debye theory, using a simple model for the rotating species. In this model these large closely planar solutes are treated as oblate symmetric tops, their solvent shells are represented by layers with uniform thickness of γ • 2rS, where 2rS is the diameter of the solvent molecule, and γ is a common fitting parameter for all types of solvent.

AB - The rotational reorientation times of two cationic dyes, nile blue A and oxazine 720 have been determined in various protic and aprotic polar solvents from the picosecond decay of their transient absorption. The results have shown a good agreement with those obtained from theoretical calculations based on Stokes-Einstein-Debye theory, using a simple model for the rotating species. In this model these large closely planar solutes are treated as oblate symmetric tops, their solvent shells are represented by layers with uniform thickness of γ • 2rS, where 2rS is the diameter of the solvent molecule, and γ is a common fitting parameter for all types of solvent.

KW - Fluorescent probe

KW - Hydrodynamic friction

KW - Rotational diffusion

KW - Solvent attachment

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