Page 72 - Photoreactive Organic Thin Films
P. 72
2. ULTRAFAST DYNAMICS IN THE EXCITED STATES OF AZO COMPOUNDS Si
Ph Ph
-N ,
COOT 0
A H
N \\ * N H
ATI r HT1 f
Ph Ph
HO
Ph 0
AT2 HT2
^ - h
N
HO N=N- -PH V// "~%
HCl
ACl M
-Ph
Ph
AC2 HC2
FIG. 2.1 Azo tautomers (A) and hydrazo tautomers (H) of IPA2N.
on(7t-Jt*excitation)
inversion(n-7t*excitation)
B
high
freq.
~400fs
torsional
\ //
H 3C-N;
CH 3
+ X
CH 3
FIG. 2.2 Rotation and inversion pathways of isomerization (A). Dynamic mode-coupling mode! of
DMAAB in the excited state (B and C).
