230 likes | 325 Views
Rotational reorientation dynamics of cationic fluorescent dyes in solution and in complex systems. Miklós Kubinyi Budapest University of Technology and Economics. Aberystwyth 1982. Pump-probe laser spectroscopic system. Transient absorption signal. t. a. Determination of t S1 and t or.
E N D
Rotational reorientation dynamics of cationic fluorescent dyes in solution and in complex systems Miklós Kubinyi Budapest University of Technology and Economics
Determination of tS1 and tor Magic angle experiment Polarization dichroism experiment
DT decay curves of NB PM MA ethanol ethyleneglycol
Temperature dependence of tS1 (NB) water methanol ethanol ethyleneglycol
Orientation relaxation time dielectric hydrodynamic
Hydrodynamic friction solvent viscosity solute volume shape factor interaction factor 0 < C < 1
Dielectric friction solvent permittivity solute dipole solvent relaxation time cavity volume
temperature dependence of tor 4000 ethanol 200 ethylenglycol 100 2000 2 3 1 40 120 80 NB OX
viscosity dependence of tor (cacd. values, SED theory) OX NB
viscosity dependence of tor (cacd. values, shell model OX NB
Microscopy: CFSE stained cell K. Suhling, Opt. Lett. 29, 584 (2004)
nile blue A in porous sol-gel glasses R. Baumann, J. Chem. Phys. 114, 5781 (2001)