Chemistry Reference
In-Depth Information
Fig. 6.7 a
Schematic representation of the synthesis of 2D-NiPc-BTDA COF with metalloph-
thalocyanine at the vertices and BTDA at the edges of the tetragonal framework;
b
top
and
side
views
of a graphical representation of a 2 2 tetragonal grid showing the eclipsed stacking of
2D polymer sheets (Pc
sky
blue
; BTDA
violet
; Ni
green
; N
blue
; S
yellow
; O
red
; B
orange
;
and H
white
). Reprinted with permission from Ref. [
15
]. Copyright 2011, American Chemical
Society
Other two porphyrin COF materials (COF-66 and COF-366) reported by Yaghi
et al. are hole-conducting and their mobilities reach as high as 8.1 and 3.9 cm
2
V
−
1
s
−
1
,
respectively (Fig.
6.9
) [
17
]. It is notable that the interlayer spacing in COF-366 (5.64 Å)
is much larger than that of COF-66 (3.81 Å). However, the carrier mobility of COF-366
is twice that of COF-66, suggesting that the charge carriers can move not only through
the stacking layers but also over the intralayer planes in the
π
-conjugated imine-linked
plane.
6.3.3 Photoconduction
The development of photofunctional materials has attracted much attention thanks
to their important applications in the fields of artificial photosynthesis, light energy
conversion, and optoelectronics. The molecular ordering of the
π
electronic com-
ponents is important, which could influence the performance of these devices.
