Small Structures,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 11, 2024
Design
and
realization
of
covalent
organic
polymers
(COPs)
with
precise
structure
are
challenging
yet
interesting.
Herein,
light‐yellow
single
crystals
a
novel
1D
COP
(named
as
CityU‐32
)
containing
the
dative
nitrogen→boron
bonds
through
assembly
between
trigonal‐planar
boronic
esters
(derived
from
catechol
benzene‐1,3,5‐triyltriboronic
acid)
2,6‐di(pyridine‐4‐yl)naphthalene
prepared.
The
single‐crystal
X‐ray
diffraction
analysis
shows
that
features
chain‐like
zigzag
multichain
stacking
feature,
where
adjacent
chains
stacked
together
interlocked
each
other
double
hydrogen
bonding
interaction
formed
ester
units.
Additionally,
has
been
demonstrated
to
show
some
potential
applications
in
field
peroxide
(H
2
O
production.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(28)
Published: May 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.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(33), P. 21804 - 21835
Published: Aug. 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.
Small Structures,
Journal Year:
2024,
Volume and Issue:
5(5)
Published: Feb. 5, 2024
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.
ACS Catalysis,
Journal Year:
2023,
Volume and Issue:
14(1), P. 533 - 546
Published: Dec. 23, 2023
Covalent
organic
frameworks
(COFs)
exhibit
relatively
inefficient
exciton
dissociation
and
free
charge
generation,
which
arise
from
their
high
binding
energy.
Here,
a
series
of
crystalline,
acrylonitrile-linked
COFs
are
fabricated
to
regulate
effects
by
strategies
shortening
the
linker
length
(TP-PN
COF),
introducing
nitrogen
atoms
(TP-BPyN
post-protonation
PCOF).
The
temperature-dependent
photoluminescence
(PL)
spectra
Nyquist
plots
reveal
decrease
in
energy
transfer
resistance
TP-PN
COF,
TP-BPyN
PCOF.
Thus,
an
increase
carrier
generation
extension
lifetime
achieved,
as
demonstrated
transient
photocurrents
response
time-resolved
fluorescence
(TRFS).
DFT
calculation
reveals
that
low
could
relate
higher
planarity
structure.
Besides,
light
absorption
performance
was
improved
length,
while
distribution
density
Pt
nanoparticles
H2
evolution
reaction
(HER)
sites
significantly
anchor
points.
As
result,
optimized
COF
show
efficient
photocatalytic
HER
rates
10,890
6457
μmol
g–1
h–1,
respectively,
13.92
8.26
times
compared
without
modification
(TP-BPN
782
h–1).
Through
simple
strategy,
is
redistributed
structural
distortion
reduced.
Consequently,
rate
PCOF
increased
12,276
h–1.
Meanwhile,
further
boosted
15,929
22,438
h–1
optimizing
volume
fractions
sacrificial
agent
pH
system,
respectively.
This
work
pave
way
for
developing
photocatalysts
via
rational
regulation
effect.
FlexMat.,
Journal Year:
2024,
Volume and Issue:
1(2), P. 160 - 172
Published: June 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.
Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(28)
Published: May 7, 2024
Abstract
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,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 27, 2024
Abstract
The
multiple
mortise‐and‐tenon
joint
parts
are
the
core
factors
to
provide
structural
stability
and
diversity
of
Chinese
Luban
locks;
however,
constructing
such
structures
is
very
challenging.
Herein,
single
crystals
a
covalent
organic
nanoribbon
(named
CityU‐27
)
prepared
through
assembly
hexahydroxytriphenylene
(HHTP),
4,4′‐vinylenedipyridine
(BYE),
phenylboronic
acid
(BA)
together
dative
boron←nitrogen
(B←N)
bonds.
single‐crystal
X‐ray
diffraction
analysis
indicates
that
has
structure,
where
each
forms
tight
π–π
interactions
with
four
neighboring
others
generate
lock‐like
configuration.
been
demonstrated
be
an
efficient
photocatalyst
in
one‐pot
tandem
reaction
hydrogen
evolution
(HER)
semi‐hydrogenation
alkynes
series
produce
olefins
without
any
additional
photosensitizers
co‐catalysts
(metal‐free).
Advanced NanoBiomed Research,
Journal Year:
2024,
Volume and Issue:
4(4)
Published: Feb. 8, 2024
Covalent
organic
frameworks
(COFs)
are
a
class
of
porous
crystalline
materials
with
exceptional
properties,
constructed
through
covalently
linked
units.
COFs
extensively
applied
in
the
field
biomedicine,
particularly
context
anticancer
treatments.
First,
this
review
summarizes
diverse
synthetic
methods
COFs,
including
solvothermal
synthesis,
microwave‐assisted
room
temperature
interface
ionothermal
techniques,
mechanical
grinding,
and
electrochemical
methods,
their
impacts
on
material's
structure
performance.
Second,
exhibit
tremendous
potential
cancer
therapy
because
orderly
lattice
structure,
tunable
pore
sizes,
high
surface
area,
excellent
thermal
chemical
stability.
Therefore,
article
deeply
explores
applications
treatment
modalities,
encompassing
early
diagnostic
bioimaging,
drug
delivery,
various
phototherapies,
chemodynamic
therapy,
sonodynamic
radiation
combined
therapeutic
strategies.
Finally,
points
out
current
research
challenges
future
directions
field.
