Covalent
organic
frameworks
(COFs)
aerogels
solve
the
restrictions
on
processability
and
application
caused
by
insolubility
non-fusibility
of
powders
while
avoiding
inaccessibility
pore
structures
dense
stacking.
At
current
start-up
stage
where
COFs
are
scarce
difficult
to
synthesize,
design
generalized
synthetic
methods
play
an
indispensable
role
in
guiding
developing
aerogels.
Moreover,
evolving
functionality
COF
is
equal
vital,
which
achieves
higher
performance
broader
practical
applications.
In
this
work,
for
first
time,
processable
BrCOFs
have
been
synthesized
without
vacuum
seven
kind
polar
solvents,
realizes
general
preparation
It
extremely
friendly
inapplicability
some
scenarios.
Furthermore,
Suzuki-Miyaura
cross-coupling
reaction,
endows
with
cyano
groups
(-CN),
trifluoromethyl
(-CF
Advanced Science,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 28, 2024
Abstract
Metal–organic
frameworks
(MOFs)
and
covalent–organic
(COFs)‐based
aerogels
are
garnering
significant
attention
owing
to
their
unique
chemical
structural
properties.
These
materials
harmoniously
combine
the
advantages
of
MOFs
COFs—such
as
high
surface
area,
customizable
porosity,
varied
functionality—with
lightweight
structured
porosity
characteristic
aerogels.
This
combination
opens
up
new
avenues
for
advanced
applications
in
fields
where
material
efficiency
enhanced
functionality
critical.
review
provides
a
comparative
overview
synthetic
strategies
utilized
produce
pristine
MOF/COF
well
MOF/COF‐based
hybrid
aerogels,
which
functionalized
with
molecular
precursors
nanoscale
materials.
The
versatility
these
positions
them
promising
candidates
addressing
complex
challenges
environmental
remediation,
energy
storage
conversion,
sustainable
water‐energy
technologies,
separations.
Furthermore,
this
study
discusses
current
future
prospects
related
synthesis
techniques
Covalent
organic
frameworks
(COFs)
have
shown
promise
as
bifunctional
catalysts
to
simultaneously
mitigate
shuttle
effects
and
Li
dendrite
issues
of
lithium–sulfur
(Li–S)
batteries.
However,
the
inherent
low
conductivity
COFs
has
significantly
limited
their
catalytic
activity
stability.
Herein,
durability
COF/MXene
heterostructure
are
activated
by
tuning
surface
curvatures
interfaced
with
MXene.
The
increased
curvature
could
induce
enhanced
electron
delocalization
alter
geometry,
which
in
turn
strengthens
lithium
polysulfide
adsorption,
lowers
energy
barriers,
stabilizes
sites
promote
sulfur
redox
reactions.
Concurrently,
hierarchical
structure
improves
electrolyte
penetration
wettability,
facilitates
rapid
ion
transport,
homogenizes
Li-ion
flux
distribution,
thus
achieving
uniform
deposition.
Consequently,
1D-COF/MXene
Li–S
batteries
demonstrate
a
high-rate
capacity
926
mA
h
g–1
at
4C,
stable
cycling
performance
reversible
589
3C
after
500
cycles,
high
604
cm–2
loading
3.5
mg
under
electrolyte-to-sulfur
ratio
10
μL
mg–1.
This
work
offers
an
efficacious
approach
regulate
stability
catalysts.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(28), С. 37052 - 37062
Опубликована: Июль 5, 2024
Covalent
organic
framework
(COF)
aerogels
with
functional
groups
offer
exceptional
processability
and
functionality
for
various
applications.
These
hierarchical
porous
materials
combine
the
advantages
of
COFs
benefits
aerogels,
overcoming
limitations
conventional
insoluble
nonfusible
COF
powders.
However,
achieving
both
high
crystallinity
shape
retention
remains
a
challenge
functionalized
aerogels.
In
this
work,
we
develop
novel
general
solvent
substitution
method
one-step
synthesis
formyl-functionalized
without
harsh
vacuum
conditions.
exhibit
excellent
processing
capabilities,
superior
mechanical
strength,
enhanced
functionality.
As
proof-of-concept,
they
were
used
in
adsorption
lithium
metal
battery
applications,
significantly
maximizing
structural
COFs,
e.g.:
(i)
structure
is
fully
wetted
by
electrolyte
to
form
continuous
transport
channels;
(ii)
polar
groups,
which
are
easier
be
acquired,
help
desolvation
transfer
Li+;
(iii)
regular
pore
structures
stabilize
deposition
Li+
inhibit
growth
dendrites.
combined
contribute
lighter
improved
energy
density
safety.
Chemistry of Materials,
Год журнала:
2024,
Номер
36(17), С. 8330 - 8337
Опубликована: Авг. 20, 2024
Covalent
organic
frameworks
(COFs),
an
emerging
class
of
crystalline
porous
materials,
have
garnered
significant
interest
due
to
their
low
density,
tunable
chemical
and
physical
properties,
structure,
high
surface
area.
COFs
typically
exhibit
microporosity,
i.e.,
pores
below
2
nm
influenced
by
specific
linkers
binding
patterns.
In
addition,
some
are
reported
small
mesopores,
especially
when
extended
used.
applications
such
as
catalysis,
where
rapid
mass
transport
is
a
crucial
factor,
hierarchical
pore
structures
catalysts
beneficial.
This
involves
the
presence
micropores
generate
large
area
additional
macropores
facilitate
reactants
catalytic
sites
promote
product
diffusion.
study
describes
application
COF
(macro-TpBpy)
for
photocatalysis.
The
macro-TpBpy
architecture
seamlessly
integrates
intrinsic
microporosity
with
macropores,
thereby
yielding
substantial
increase
in
material
demonstrates
promising
performance
photocatalytic
hydrogen
evolution
reaction,
exhibiting
rate
4.88
mmol
g–1
h–1.
Notably,
this
fourfold
improvement
compared
analogue
featuring
only.
Furthermore,
introduction
proved
be
beneficial
production
peroxide
(H2O2).
Specifically,
exhibited
2716
μmol
h–1,
water
without
sacrificial
hole
scavengers,
whereas
pristine
TpBpy
had
2134
work
thus
contributes
further
development
photocatalysis
shows
that,
addition
suitable
band
structure
functionality,
size
substrate
it
must
also
considered
important
factors.
ABSTRACT
The
urgent
demand
for
renewable
energy
solutions,
propelled
by
the
global
crisis
and
environmental
concerns,
has
spurred
creation
of
innovative
materials
solar
thermal
storage.
Photothermal
phase
change
(PTPCMs)
represent
a
novel
type
composite
material
(PCM)
aimed
at
improving
storage
efficiency
incorporating
photothermal
into
traditional
PCMs
encapsulating
them
within
porous
structures.
Various
encapsulation
have
been
studied,
including
carbon,
expanded
graphite,
ceramics,
but
issues
like
brittleness
hinder
their
practical
use.
To
overcome
these
limitations,
flexible
PTPCMs
using
organic
polymers—like
foams,
hydrogels,
wood—have
emerged,
offering
high
porosity
lightweight
characteristics.
This
review
examines
recent
advancements
in
preparation
based
on
polymer
supports
through
techniques
impregnation
situ
polymerization,
assessing
impact
different
PCM
performance
clarifying
mechanisms
conversion
heat
Subsequently,
most
applications
polymer‐based
are
systematically
summarized,
future
research
challenges
possible
solutions
discussed.
aims
to
foster
awareness
about
potential
promoting
environmentally
friendly
practices
catalyzing
further
this
promising
field.
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 28, 2025
Dynamic
visualization
of
strain
and
its
distribution
in
materials
are
still
challenging.
Herein,
dual-fluorophore
three-dimensional
covalent
organic
frameworks
(3D-COFs)
the
PEGylated
3D-COFs
(PEG-3D-COFs)
were
synthesized
for
construction
physically
interacted
assemblies
to
realize
fluorescence
imaging
on
not
only
but
also
strain-related
surface
friction
flow
velocity
distributions
various
media
including
polymer
elastomers,
or
aqueous
dispersions.
The
responsiveness
arises
from
controllability
aggregation
structure
PEG-3D-COFs,
showing
concentration-dependent
morphology
photoluminescence,
meanwhile
having
a
concentration-deformation
equivalence
structural
evolution
dynamics
which
drives
color
change
COF
emission
solids
liquids
with
high
sensitivity
reversibility,
whenever
superstructure
is
affected
by
applied
matrices.
report
will
inspire
further
efforts
construct
responsive
COFs
optical
measurement
aims.
Architecting
hierarchical
structures
in
monolithic
covalent
organic
frameworks
(COFs)
is
vital
for
the
applications
of
COFs
mass
transport
fields.
The
MXene-coated
bilayer
aerogels
containing
β-keto-enamine
COF
(MX-TpX-COF)
with
different
chain
lengths
aromatic
linkers
are
constructed
study.
directional
freezing
method
endowed
part
and
MXene
coating
aligned
channels,
small
pores
mainly
exist
former,
while
larger
ones
latter.
occurrence
multi-level
inside
bulks,
together
locally
ordered
vessels
formed
surfaces
coating,
conducive
to
aerogels.
Accordingly,
MX-TpX-COF
showed
attractive
performance
oil/water
separation
desalination,
even
can
be
used
treating
desalinating
oil-contaminated
seawater
simultaneously.
rate
efficiency,
however,
strongly
depended
on
hydrophilicity
specific
surface
areas
which
easily
tuned
by
tailoring
linkers.
This
study
offers
a
perspective
utilization
bulk
materials
marine
governance,
also
proposes
structural
regulation
way
multi-functional
integration
COF-based
