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Rotational reorientation dynamics of cationic fluorescent dyes in solution and in complex systems

This study explores the rotational reorientation dynamics of cationic fluorescent dyes in various solution and complex systems. It discusses the use of pump-probe laser spectroscopy to determine the transient absorption signal, time constants (tS1 and tor), and temperature dependence of the dye molecules. The research also investigates the influence of solvent characteristics, dielectric friction, solvent viscosity, and solute properties on the dye's orientation relaxation time.

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Rotational reorientation dynamics of cationic fluorescent dyes in solution and in complex systems

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  1. Rotational reorientation dynamics of cationic fluorescent dyes in solution and in complex systems Miklós Kubinyi Budapest University of Technology and Economics

  2. Aberystwyth 1982

  3. Pump-probe laser spectroscopic system

  4. Transient absorption signal t a

  5. Determination of tS1 and tor Magic angle experiment Polarization dichroism experiment

  6. nile blue A and oxazine 170

  7. DT decay curves of NB PM MA ethanol ethyleneglycol

  8. Temperature dependence of tS1 (NB)  water  methanol  ethanol  ethyleneglycol

  9. Orientation relaxation time dielectric hydrodynamic

  10. Hydrodynamic friction solvent viscosity solute volume shape factor interaction factor 0 < C < 1

  11. Dielectric friction solvent permittivity solute dipole solvent relaxation time cavity volume

  12. Solvent characteristics at 20 C

  13. Isodensity surface of OX,re = 0.0035 e/bohr3

  14. inertia axes OX

  15. solute properties

  16. temperature dependence of tor 4000 ethanol 200 ethylenglycol 100 2000 2 3 1 40 120 80 NB OX

  17. viscosity dependence of tor (exp. values) OX NB

  18. viscosity dependence of tor (cacd. values, SED theory) OX NB

  19. viscosity dependence of tor (cacd. values, shell model OX NB

  20. solvent shell

  21. Microscopy: CFSE stained cell K. Suhling, Opt. Lett. 29, 584 (2004)

  22. nile blue A in porous sol-gel glasses R. Baumann, J. Chem. Phys. 114, 5781 (2001)

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