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.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: May 19, 2023
Three-dimensional
(3D)
covalent
organic
frameworks
(COFs)
possess
higher
surface
areas,
more
abundant
pore
channels,
and
lower
density
compared
to
their
two-dimensional
counterparts
which
makes
the
development
of
3D
COFs
interesting
from
a
fundamental
practical
point
view.
However,
construction
highly
crystalline
COF
remains
challenging.
At
same
time,
choice
topologies
in
is
limited
by
crystallization
problem,
lack
availability
suitable
building
blocks
with
appropriate
reactivity
symmetries,
difficulties
structure
determination.
Herein,
we
report
two
pto
mhq-z
designed
rationally
selecting
rectangular-planar
trigonal-planar
conformational
strains.
The
show
large
size
46
Å
an
extremely
low
calculated
density.
net
topology
solely
constructed
totally
face-enclosed
polyhedra
displaying
precise
uniform
micropore
1.0
nm.
high
CO2
adsorption
capacity
at
room
temperature
can
potentially
serve
as
promising
carbon
capture
adsorbents.
This
work
expands
accessible
topologies,
enriching
structural
versatility
COFs.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(11)
Published: Nov. 27, 2023
Abstract
Covalent
organic
frameworks
(COFs)
are
crystalline
porous
polymers
that
can
be
precisely
integrated
by
building
blocks
to
achieve
pre‐designed
composition,
components,
and
functions,
making
them
a
powerful
platform
for
the
development
of
molecular
devices
in
field
electrocatalysis.
The
precise
control
channel/dopant
positions
highly
ordered
network
structures
COFs
provide
an
ideal
material
system
applications
advanced
In
this
paper,
topological
structure
design
synthesis
methods
reviewed
detail,
their
principles
deeply
analyzed.
addition,
derivatives
electrocatalysis
systematically
summarized
optimization
strategies
proposed.
Finally,
application
prospects
challenges
may
encountered
future
prospected,
providing
helpful
guidance
research.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Jan. 27, 2024
Abstract
The
synthesis
of
three-dimensional
covalent
organic
frameworks
with
highly
connected
building
blocks
presents
a
significant
challenge.
In
this
study,
we
report
two
3D
COFs
the
nia
topology,
named
JUC-641
and
JUC-642,
by
introducing
planar
hexagonal
triangular
prism
nodes.
Notably,
our
adsorption
studies
breakthrough
experiments
reveal
that
both
exhibit
exceptional
separation
capabilities,
surpassing
previously
reported
most
porous
polymers,
factor
up
to
2.02
for
benzene
cyclohexane.
Additionally,
dispersion-corrected
density
functional
theory
analysis
suggests
good
performance
these
can
be
attributed
incorporation
aromatic
presence
extensive
pore
structures.
Consequently,
research
not
only
expands
diversity
but
also
highlights
potential
COF
materials
as
promising
candidates
environmentally-friendly
applications.
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.
