UNIGE document Scientific Article
previous document  unige:2979  next document
add to browser collection
Title

Energetics of Exciplex Formation Using Picosecond Transient Thermal Phase Grating Spectroscopy

Authors
Henseler, Arthur
Published in Journal of Physical Chemistry. C. 1996, vol. 100, no. 1, p. 170-175
Abstract A study of the energetics of electron transfer (e.t.) quenching of 9-cyanoanthracene fluorescence by aromatic (π) and aliphatic (n) donors in n-hexane using picosecond transient thermal phase grating spectroscopy is reported. The results show that the enthalpy of exciplex formation is well correlated with the redox potentials of the partners and independent of the nature of the donor, as long as exciton interaction is small. The main difference between exciplexes with donors of the two classes is the larger ground-state repulsion energy with n-donors. However, if the adiabatic ionization potentials are considered, the enthalpy of exciplex formation with n-donors is larger than expected by about 0.4 eV. These two contradictory results reflect an inconsistency between the values for adiabatic ionization potentials and oxidation potentials of n-donors. The occurrence of two distinct Rehm−Weller plots for e.t. quenching with π- and n-donors shifted by about 0.8 eV on the horizontal axis seems to originate to some extent from the use of adiabatic ionization potentials.
Identifiers
Full text
Structures
Research group Groupe Vauthey
Citation
(ISO format)
VAUTHEY, Eric, HENSELER, Arthur. Energetics of Exciplex Formation Using Picosecond Transient Thermal Phase Grating Spectroscopy. In: Journal of Physical Chemistry. C, 1996, vol. 100, n° 1, p. 170-175. https://archive-ouverte.unige.ch/unige:2979

225 hits

0 download

Update

Deposited on : 2009-09-21

Export document
Format :
Citation style :