Advances in Physical Chemistry / 2011 / Article / Tab 1 / Review Article
Transient Exciplex Formation Electron Transfer Mechanism Table 1 Parameters of exciplex formation and decay, obtained from the dependences of
𝑘
𝑄
on
Δ
𝐺
∗
𝐸
𝑇
(
16 ) in various systems.
Figure System
l
o
g
𝜏
′
0
+
𝑎
/
2
.
3
𝑅
𝑇
a /eVa (
l
o
g
𝜏
0
)b /eVc /eV
𝜆
b
/
e
V
Reference 7 Various aromatics (in MeCN) (charge separation) −2.8 0.3 (−8) 0.06 0.3 0.35 0.11c [31 ] 8 1
(
M
e
C
=
O
)
2
∗
and 3
(
M
e
C
=
O
)
2
+ alkenes (in MeCN) (charge separation)−4.7 0.24 (−9) 0.35 0.28 0.9 [33 ] 9 Oxonine+ + substituted benzenes (in MeOH) (charge shift) −7.8 0.24 (−12) −0.05 0.28 0.3 [43 ] 10 1 Aromatics* + chlorobenzenes (in MeCN) (charge separation)−4.9 0.25 (−9) 0.32 0.3 (0.2–0.37) 0.7 [12 ] 11 3 Quinones + methylbenzenes (in MeCN and CH2 Cl2 ) (charge separation)−4.5 0.25 (−9) −0.22 0.2 0.1 [14 ] 12 1 Cyanoaromatics* + methoxy- benzenes and methylnaphthalenes in MeCN (charge separation)−4.7 0.25 (−8) −0.23 0.2 0.25 [15 ] 13 1 3-Carboxyethyl-7-methyl-thioxanthen-9-one* + Methyl- benzenes in MeCN −7.3 0.18 (−11) 0.13 0.1 0.1
[39 ] + Methoxybenzenes in MeCN (charge separation) −5.9 0.35 (−11) 0.13 0.1 0.5 14 1 Cyanoaromatics* + pyridine in MeCN−3.5 0.34 (−10.5) −0.05 0.5 <0
[48 ] + Lutidine in MeCN (charge separation) −1.2 0.34 (−8) −0.05 0.5 0.1
a Values of
𝑎
are obtained for the estimated values of
l
o
g
𝜏
′
0
.
b Values of
𝜆
for (3 ) are estimated for
Δ
𝐺
E
T
∗
>
−
0
.
3
eV (they are not valid at
Δ
𝐺
E
T
∗
<
−
0
.
3
eV). c Estimated values of
Δ
𝐺
‡
0
for (6 ).