Journal of the American Chemical Society,
Journal Year:
2022,
Volume and Issue:
145(2), P. 1022 - 1030
Published: Dec. 30, 2022
The
development
of
conductive
covalent
organic
frameworks
(COFs)
with
high
stability
is
desirable
for
the
practical
applications
in
optoelectronics
and
energy
storage.
Herein,
we
developed
a
new
kind
Janus
dione-based
COF,
which
fully
sp2
carbon-conjugated
through
connection
by
olefin
units.
electrical
conductivity
carrier
mobility
reached
up
to
10-3
S
cm-1
7.8
cm2
V-1
s-1,
respectively.
In
addition,
these
COFs
are
strongly
robust
against
various
harsh
conditions.
well-ordered
two-dimensional
crystalline
structures,
excellent
porosity,
conductivity,
abundant
redox-active
carbonyl
units
render
serviceable
as
high-performance
cathode
materials
lithium-ion
batteries.
It
worth
noting
that
TFPPy-ICTO-COF
exhibits
capacity
338
mAh
g-1
at
discharge
rate
0.1
C,
sets
record
among
COF-based
Its
retention
was
100%
even
after
1000
cycles,
demonstrating
remarkable
COF
materials.
This
work
not
only
expands
diversity
olefin-linked
but
also
makes
breakthrough
ACS Nano,
Journal Year:
2021,
Volume and Issue:
15(8), P. 12723 - 12740
Published: Aug. 16, 2021
Covalent
organic
frameworks
(COFs)
prevail
as
diverse
forms
of
solids
in
bulk,
e.g.,
powders,
monoliths,
thin
films,
etc.
These
architectures
constructed
from
a
similar
net
design
at
the
molecular
to
framework
level
differ
their
hierarchical
assembly
laid
upon
nano-
mesoscale
structures.
However,
even
after
decade
and
half
research,
primary
focus
field
lies
on
covalent
reticular
structure,
chemistry
COFs
nano
regime
is
often
overlooked.
The
COF
nanostructures
(nanosheets,
nanofibers,
nanospheres)
are
quite
distinct
bulk
influence
properties
counterparts.
Although
strong
directional
bonds
generates
these
building
blocks,
divergent
chemical
supramolecular
interactions
assemble
nanomotifs
into
macroscale
solids.
We
believe
that
synthetic
can
be
extended
beyond
molecule
→
meso
hierarchy
COFs.
In
this
review,
we
take
closer
look
"supramolecular
nanosynthesis"
discuss
how
reciprocate
forms.
Journal of the American Chemical Society,
Journal Year:
2021,
Volume and Issue:
143(37), P. 15011 - 15016
Published: Sept. 13, 2021
The
synthesis
of
three-dimensional
(3D)
covalent
organic
frameworks
(COFs)
requires
high-connectivity
polyhedral
building
blocks
or
the
controlled
alignment
blocks.
Here,
we
use
latter
strategy
to
assemble
square-planar
cobalt(II)
phthalocyanine
(PcCo)
units
into
nbo
topology
by
using
tetrahedral
spiroborate
(SPB)
linkages
that
were
chosen
provide
necessary
90°
dihedral
angles
between
neighboring
PcCo
units.
This
yields
a
porous
3D
COF,
SPB-COF-DBA,
with
noninterpenetrated
topology.
SPB-COF-DBA
shows
high
crystallinity
and
long-range
order,
11
resolved
diffraction
peaks
in
experimental
powder
X-ray
(PXRD)
pattern.
well-ordered
crystal
lattice
can
also
be
imaged
high-resolution
transmission
electron
microscopy
(HR-TEM).
has
cubic
pores
exhibits
permanent
porosity
Brunauer–Emmett–Teller
(BET)
surface
area
1726
m2
g–1.
ACS Central Science,
Journal Year:
2022,
Volume and Issue:
8(7), P. 926 - 932
Published: June 16, 2022
We
report
a
postsynthetic
strategy
and
its
implementation
to
make
covalent
organic
frameworks
(COFs)
with
irreversible
hydrazide
linkages.
This
involved
the
synthesis
of
three
2D
3D
hydrazine-linked
their
partial
oxidation.
The
linkage
functional
group
transformation-hydrazine
hydrazide-were
evidenced
by
15N
multi-CP-MAS
NMR.
In
addition,
isothermal
water
uptake
profiles
these
were
studied,
leading
discovery
one
hydrazine-hydrazide-linked
COF
suitable
for
harvesting
from
air
in
arid
conditions.
displayed
characteristic
S-shaped
sorption
profiles,
steep
pore-filling
step
below
18%
relative
humidity
at
25
°C,
total
capacity
0.45
g
g-1.
found
that
even
small
changes
made
on
molecular
level
can
lead
major
differences
isotherm
therefore
pointing
utility
analysis
as
complementary
analytical
tool
study
transformations.
Journal of the American Chemical Society,
Journal Year:
2022,
Volume and Issue:
144(13), P. 5728 - 5733
Published: March 23, 2022
The
connectivity
of
building
units
for
3D
covalent
organic
frameworks
(COFs)
has
long
been
primarily
4
and
6,
which
have
severely
curtailed
the
structural
diversity
COFs.
Here
we
demonstrate
successful
design
synthesis
a
porphyrin
based,
8-connected
block
with
cubic
configuration,
could
be
further
reticulated
into
an
unprecedented
interpenetrated
pcb
topology
by
imine
condensation
linear
amine
monomers.
This
study
presents
first
case
high-connectivity
bearing
nodes,
thus
greatly
enriching
topological
possibilities
Journal of the American Chemical Society,
Journal Year:
2022,
Volume and Issue:
145(2), P. 1022 - 1030
Published: Dec. 30, 2022
The
development
of
conductive
covalent
organic
frameworks
(COFs)
with
high
stability
is
desirable
for
the
practical
applications
in
optoelectronics
and
energy
storage.
Herein,
we
developed
a
new
kind
Janus
dione-based
COF,
which
fully
sp2
carbon-conjugated
through
connection
by
olefin
units.
electrical
conductivity
carrier
mobility
reached
up
to
10-3
S
cm-1
7.8
cm2
V-1
s-1,
respectively.
In
addition,
these
COFs
are
strongly
robust
against
various
harsh
conditions.
well-ordered
two-dimensional
crystalline
structures,
excellent
porosity,
conductivity,
abundant
redox-active
carbonyl
units
render
serviceable
as
high-performance
cathode
materials
lithium-ion
batteries.
It
worth
noting
that
TFPPy-ICTO-COF
exhibits
capacity
338
mAh
g-1
at
discharge
rate
0.1
C,
sets
record
among
COF-based
Its
retention
was
100%
even
after
1000
cycles,
demonstrating
remarkable
COF
materials.
This
work
not
only
expands
diversity
olefin-linked
but
also
makes
breakthrough
