ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(6), P. 3778 - 3787
Published: Feb. 22, 2024
In
recent
years,
significant
progress
has
been
achieved
in
the
field
of
three-dimensional
covalent
organic
frameworks
(3D
COFs).
However,
there
is
still
a
great
challenge
to
use
flexible
building
units
synthesize
high-connectivity
3D
COFs.
this
work,
we
showed
that
[6
+
3]
COFs
could
be
constructed
by
inducing
highly
planar
blocks
from
C3
antitriangular
prismed
blocks.
Herein,
two
with
spn
topology
based
on
cyclotriphosphazene
were
and
denoted
as
TAA/TAB-CTP-COF,
their
redox
ability
photophysical
features
can
finely
regulated
coupled
functional
group,
such
benzene
triazine
groups.
As
result,
heteromotif
molecular
junction
TAA-CTP-COF
fully
exposed
active
sites
high
photocatalytic
production
hydrogen
peroxide
(H2O2)
yield
1041
μM
h–1
without
any
additional
photosensitizers,
scavengers,
or
cocatalysts.
Furthermore,
presence
an
electron
donor,
rate
H2O2
reach
up
2221
h–1,
exhibiting
one
best
performances
for
crystalline
materials.
This
work
showcases
potential
using
highlights
versatility
efficacy
metal-free
solar
energy
conversion.
Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
61(13)
Published: Jan. 24, 2022
Owing
to
the
finite
building
blocks
and
difficulty
in
structural
identification,
it
remains
a
tremendous
challenge
elaborately
design
synthesize
three-dimensional
covalent
organic
frameworks
(3D
COFs)
with
predetermined
topologies.
Herein,
we
report
first
two
cases
of
3D
COFs
non-interpenetrated
hea
net,
termed
JUC-596
JUC-597,
by
using
combination
tetrahedral
triangular
prism
units.
Due
presence
triptycene
functional
groups
fluorine
atoms,
exhibits
an
exceptional
performance
H2
adsorption
up
305
cm3
g-1
(or
2.72
wt%)
at
77
K
1
bar,
which
is
higher
than
previous
benchmarks
from
porous
materials
reported
so
far.
Furthermore,
strong
interaction
between
COF
verified
through
DFT
theoretical
calculations.
This
work
represents
captivating
example
rational
based
on
reticular
chemistry
guide
demonstrates
its
promising
application
clean
energy
storage.
Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
62(3)
Published: Oct. 18, 2022
Abstract
Three‐dimensional
covalent
organic
frameworks
(3D
COFs)
with
spatially
periodic
networks
demonstrate
significant
advantages
over
their
2D
counterparts,
including
enhanced
specific
surface
areas,
interconnected
channels,
and
more
sufficiently
exposed
active
sites.
Nevertheless,
research
on
these
materials
has
met
an
impasse
due
to
serious
problems
in
crystallization
stability,
which
must
be
solved
for
practical
applications.
In
this
Minireview,
we
first
summarize
some
strategies
preparing
functional
3D
COFs,
techniques
functionalization
methods.
Hereafter,
applications
of
are
presented,
covering
adsorption,
separation,
catalysis,
fluorescence,
sensing,
batteries.
Finally,
the
future
challenges
perspectives
development
COFs
discussed.
Journal of Materials Chemistry A,
Journal Year:
2022,
Volume and Issue:
10(9), P. 4653 - 4659
Published: Jan. 1, 2022
A
3D
cobalt
porphyrin-based
covalent
organic
framework,
3D-Por(Co/H)-COF,
was
prepared
to
maximize
the
accessibility
of
active
sites
for
enhanced
activity
electrochemical
CO
2
reduction
reaction.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(11)
Published: Jan. 24, 2023
Two-dimensional
conductive
metal-organic
frameworks
(2D-c-MOFs)
have
attracted
extensive
attention
owing
to
their
unique
structures
and
physical-chemical
properties.
However,
the
planarly
extended
structure
of
2D-c-MOFs
usually
limited
accessibility
active
sites.
Herein,
we
designed
a
triptycene-based
2D
vertically
MOF
(2D-vc-MOF)
by
coordinating
2,3,6,7,14,15-hexahydroxyltriptycene
(HHTC)
with
Cu2+
.
The
2D-vc-MOF(Cu)
possesses
weak
interlayer
interaction,
which
leads
facile
exfoliation
nanosheet.
Compared
classical
structures,
exhibits
100
%
increased
catalytic
activity
in
terms
turnover
number
two-fold
selectivity.
Density
functional
theory
(DFT)
calculations
further
revealed
that
higher
originated
from
lower
energy
barriers
during
CO2
reduction
reaction
process.
Journal of the American Chemical Society,
Journal Year:
2023,
Volume and Issue:
145(17), P. 9679 - 9685
Published: April 18, 2023
Although
isomerism
is
a
typical
and
significant
phenomenon
in
organic
chemistry,
it
rarely
found
covalent
framework
(COF)
materials.
Herein,
for
the
first
time,
we
report
controllable
synthesis
of
topological
isomers
three-dimensional
COFs
via
distinctive
tetrahedral
building
unit
under
different
solvents.
Based
on
this
strategy,
both
with
dia
or
qtz
net
(termed
JUC-620
JUC-621)
have
been
obtained,
their
structures
are
determined
by
combining
powder
X-ray
diffraction
transmission
electron
microscopy.
Remarkably,
these
architectures
show
distinct
difference
porous
features;
example,
JUC-621
exhibits
permanent
mesopores
(up
to
∼23
Å)
high
surface
area
(∼2060
m2
g-1),
which
far
surpasses
those
(pore
size
∼12
Å
980
g-1).
Furthermore,
mesoporous
can
remove
dye
molecules
efficiently
achieves
excellent
iodine
adsorption
6.7
g
2.3
times
that
microporous
(∼2.9
This
work
thus
provides
new
way
constructing
COF
promotes
structural
diversity
promising
applications
