Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(34)
Опубликована: Июнь 11, 2024
In
this
study,
we
successfully
developed
two
novel
vinylene-linked
covalent
organic
frameworks
(COFs)
using
2-connected
3,6-dimethylpyridazine
through
Knoevenagel
condensation.
These
COFs
featured
finely
tailored
micro-/nano-scale
pore
sizes,
high
surface
areas
and
stable
non-polar
vinylene
linkages.
Finely
resolved
powder
X-ray
diffraction
patterns
demonstrated
highly
crystalline
structures
with
a
hexagonal
lattice
in
the
AA
layer
stacking.
The
resulting
one-dimensional
channels
possess
strong
hydrogen-bond
accepting
sites
arising
from
decorated
cis-azo/azine
units
pairs
of
fully
exposed
lone
pair
electrons,
endowing
as-prepared
exceptional
water
absorption
properties.
g-DZPH-COF
exhibited
successive
steep
uptake
steps
starting
low
relative
pressures
(P/P
Chemical Science,
Год журнала:
2023,
Номер
14(47), С. 13601 - 13628
Опубликована: Янв. 1, 2023
This
review
summarizes
the
recent
advances
in
electrode
application
of
covalent
organic
frameworks
(COFs)
for
supercapacitors,
including
design
strategies
from
molecular
scale
to
morphology
control
level
and
their
device
performance.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(28)
Опубликована: Май 7, 2024
Alkali
metals
(e.g.
Li,
Na,
and
K)
multivalent
Zn,
Mg,
Ca,
Al)
have
become
star
anodes
for
developing
high-energy-density
rechargeable
batteries
due
to
their
high
theoretical
capacity
excellent
conductivity.
However,
the
inevitable
dendrites
unstable
interfaces
of
metal
pose
challenges
safety
stability
batteries.
To
address
these
issues,
covalent
organic
frameworks
(COFs),
as
emerging
materials,
been
widely
investigated
regular
porous
structure,
flexible
molecular
design,
specific
surface
area.
In
this
minireview,
we
summarize
research
progress
COFs
in
stabilizing
anodes.
First,
present
origins
delve
into
advantages
based
on
physical/chemical
properties
alkali
metals.
Then,
special
attention
has
paid
application
host
design
anodes,
artificial
solid
electrolyte
interfaces,
additives,
solid-state
electrolytes,
separator
modifications.
Finally,
a
new
perspective
is
provided
from
pore
modulation,
synthesis
COFs.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(22)
Опубликована: Апрель 2, 2024
The
ion
extraction
and
electro/photo
catalysis
are
promising
methods
to
address
environmental
energy
issues.
Covalent
organic
frameworks
(COFs)
a
class
of
template
construct
absorbents
catalysts
because
their
stable
frameworks,
high
surface
areas,
controllable
pore
environments,
well-defined
catalytic
sites.
Among
them,
ionic
COFs
as
unique
crystalline
porous
materials,
with
charges
in
the
or
along
walls,
have
shown
different
properties
resulting
performance
these
applications
those
from
charge-neutral
COFs.
In
this
review,
current
research
progress
based
on
for
conversion,
including
cationic/anionic
materials
is
reviewed
terms
synthesis
strategy,
modification
methods,
mechanisms
adsorption
catalysis,
well
applications.
Finally,
we
demonstrated
challenges
future
development
design
strategies
ACS Nano,
Год журнала:
2024,
Номер
18(33), С. 21804 - 21835
Опубликована: Авг. 8, 2024
Covalent
organic
frameworks
(COFs)
are
crystalline
networks
with
extended
backbones
cross-linked
by
covalent
bonds.
Due
to
the
semiconductive
properties
and
variable
metal
coordinating
sites,
along
rapid
development
in
linkage
chemistry,
utilization
of
COFs
photocatalytic
CO2RR
has
attracted
many
scientists'
interests.
In
this
Review,
we
summarize
latest
research
progress
on
for
CO2
reduction.
first
part,
present
COF
linkages
that
have
been
used
CO2RR,
discuss
four
mechanisms
including
as
intrinsic
photocatalysts,
photosensitive
motifs
metalated
semiconductors
heterojunction
photocatalysts.
Then,
principles
structural
designs
functional
building
units
stacking
mode
exchange.
Finally,
outlook
challenges
provided.
This
Review
is
intended
give
some
guidance
design
synthesis
diverse
different
linkages,
various
structures,
divergent
modes
efficient
photoreduction
CO2.
In
current
research,
achieving
carbon
neutrality
has
become
a
primary
focus
through
the
utilization
of
various
conversion
technologies
that
transform
dioxide
(CO
2
)
into
valuable
chemicals
or
fuels.
Covalent
organic
frameworks
(COFs),
as
emerging
crystalline
polymers,
offer
distinct
advantages
in
CO
compared
to
other
materials.
These
include
controllable
nanoscale
pores,
predefined
functional
units,
editable
framework
structures,
and
rich
conjugated
systems.
The
unique
characteristics
COFs
make
them
highly
promising
electrocatalysts
for
conversion.
This
review
provides
comprehensive
overview
pioneering
works
recent
research
on
COF‐based
materials
electrochemical
reduction
reaction.
offers
analysis
design
principles
reactive
sites,
skeleton
pore
functionalities,
3D
frameworks,
morphologies,
composite
COFs,
aiming
enhance
electrocatalysis.
Finally,
this
presents
some
recommendations
material
design,
reaction
mechanisms,
theoretical
computations
understanding
mechanisms
further
facilitate
high‐performance
electrocatalysts.
Chemical Society Reviews,
Год журнала:
2024,
Номер
53(14), С. 7531 - 7565
Опубликована: Янв. 1, 2024
Covalent
organic
frameworks
(COFs)
have
recently
seen
significant
advancements.
Large
quantities
of
structurally
&
functionally
oriented
COFs
with
a
wide
range
applications,
such
as
gas
adsorption,
catalysis,
separation,
and
drug
delivery,
been
explored.
Recent
achievements
in
this
field
are
primarily
focused
on
advancing
synthetic
methodologies,
catalysts
playing
crucial
role
achieving
highly
crystalline
COF
materials,
particularly
those
featuring
novel
linkages
chemistry.
A
series
reviews
already
published
over
the
last
decade,
covering
fundamentals,
synthesis,
applications
COFs.
However,
despite
pivotal
that
auxiliaries
play
forming
materials
adjusting
their
properties
(
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 8, 2024
Organic
piezoelectric
nanogenerators
(PENGs)
are
attractive
in
harvesting
mechanical
energy
for
various
self-powering
systems.
However,
their
practical
applications
severely
restricted
by
low
output
open
circuit
voltage.
To
address
this
issue,
herein,
we
prepared
two
two-dimensional
(2D)
covalent
organic
frameworks
(COFs,
CityU-13
and
CityU-14),
functionalized
with
fluorinated
alkyl
chains
PENGs.
The
piezoelectricity
of
both
COFs
was
evidenced
switchable
polarization,
characteristic
butterfly
amplitude
loops,
phase
hysteresis
conspicuous
surface
potentials
high
coefficient
value
(d
FlexMat.,
Год журнала:
2024,
Номер
1(2), С. 160 - 172
Опубликована: Июнь 24, 2024
Abstract
Covalent
organic
frameworks
(COFs)
are
porous
materials
with
good
crystallinity,
highly
ordered
stacking,
tunable
channels,
and
diverse
functional
groups
that
have
been
demonstrated
to
show
great
potential
applications
in
flexible
electronic
devices,
including
energy
storage
devices
(batteries
supercapacitors),
memristors
sensors.
Although
research
progress
on
the
usage
of
COFs
as
active
elements
electronics
has
witnessed,
summary
this
direction
is
rare.
Thus,
it
right
time
write
a
review
COFs‐based
electronics.
In
review,
we
will
first
discuss
different
synthesis
strategies
prepare
COF
materials.
Then,
summarized.
Finally,
future
performance
improvement
development
directions
field
briefly
outlined.
This
could
provide
basic
concepts
some
guidelines
stimulate
novel
devices.
