Chemistry Reference
In-Depth Information
ULTRAFAST TIME-RESOLVED
STUDIES OF THE PHOTOCHEMISTRY
OF ARYL AZIDES
J
IN
W
ANG
,G
OTARD
B
URDZINSKI
,
AND
M
ATTHEW
S. P
LATZ
1.1 Introduction
1.2 Aryl Azide Excited States and Nitrenes
1.2.1 Ultrafast UV-Vis Studies
1.2.2 Ultrafast IR Studies
1.3 Aryl Nitrenium Ions
1.3.1
p
-Biphenylyl Nitrenium Cation
1.3.2
o
-Biphenylyl Nitrenium Cation
1.3.3 1-Naphthyl Nitrenium Cation
1.3.4 2-Naphthyl Nitrenium Cation
1.3.5 Phenyl Nitrenium Cation
1.3.6 2-Fluorenyl Nitrenium Cation and the Influence of Solvent
1.4 Conclusions
Acknowledgments
References
1.1
INTRODUCTION
Kasha's rule states that a photophysical and/or photochemical process originates
from the lowest vibrational level of the lowest excited state.
1
This rule is very
successful in explaining the commonly observed mirror image symmetry between
the vibronic structure of absorption and fluorescence spectra
2
and wavelength-
