Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 23, 2024
Abstract
Kinetic
factors
frequently
emerge
as
the
primary
constraints
in
photocatalysis,
exerting
a
critical
influence
on
efficacy
of
polymeric
photocatalysts.
The
diverse
conjugation
systems
within
covalent
organic
frameworks
(COFs)
can
significantly
impact
photon
absorption,
energy
level
structures,
charge
separation
and
migration
kinetics.
Consequently,
these
limitations
often
manifest
unsatisfactory
kinetic
behavior,
which
adversely
affects
photocatalytic
activity
COFs.
To
address
challenges,
we
propose
methoxy
(−OMe)
molecular
engineering
strategy
designed
to
enhance
carrier
kinetics
mitigate
mass
transfer
resistance.
Through
strategic
modulation
position
quantity
−OMe
units,
effectively
manipulate
p‐π
conjugation,
thereby
enhancing
migration.
Moreover,
COFs
enriched
with
moieties
exhibit
enhanced
dynamics
due
hydrophilic
nature
groups,
facilitate
diffusion
reactants
products
porous
structure.
This
approach
is
hypothesized
drive
an
efficient
hydrogen
evolution
reaction.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(22)
Published: April 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
Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(22)
Published: April 2, 2024
Abstract
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
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(47), P. 32161 - 32205
Published: Nov. 18, 2024
Covalent
organic
frameworks
(COFs)
are
created
by
the
condensation
of
molecular
building
blocks
and
nodes
to
form
two-dimensional
(2D)
or
three-dimensional
(3D)
crystalline
frameworks.
The
diversity
with
different
properties
functionalities
large
number
possible
framework
topologies
open
a
vast
space
well-defined
porous
architectures.
Besides
more
classical
applications
materials
such
as
absorption,
separation,
catalytic
conversions,
interest
in
optoelectronic
COFs
has
recently
increased
considerably.
electronic
both
their
linkage
chemistry
can
be
controlled
tune
photon
absorption
emission,
create
excitons
charge
carriers,
use
these
carriers
photocatalysis,
luminescence,
chemical
sensing,
photovoltaics.
In
this
Perspective,
we
will
discuss
relationship
between
structural
features
properties,
starting
connectivity,
layer
stacking
2D
COFs,
control
over
defects
morphology
including
thin
film
synthesis,
exploring
theoretical
modeling
structural,
electronic,
dynamic
discussing
recent
intriguing
focus
on
photocatalysis
photoelectrochemistry.
We
conclude
some
remarks
about
present
challenges
future
prospects
powerful
architectural
paradigm.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 16, 2024
Polycyclic
aromatic
hydrocarbons
(PAHs)
hold
the
predominant
role
either
as
individual
molecules
or
building
blocks
in
field
of
organic
semiconductors
nanocarbons.
Connecting
PAHs
via
sp
The Journal of Chemical Physics,
Journal Year:
2024,
Volume and Issue:
160(5)
Published: Feb. 6, 2024
We
designed
a
trigonal
symmetric
imine-linked
covalent
organic
framework
(COF),
TFPC-DAB,
with
control
over
the
angularity
of
building
units,
where
bent
C2-symmetric
diamine,
such
as
1,3-diaminobenzene
(1,3-DAB
or
DAB),
an
exo-angle
120°
was
used
instead
those
180°,
in
combination
C3-symmetric
trialdehyde,
tri(4-formylphenoxy)cyanurate
(TFPC).
Its
synthesis
accomplished
by
reacting
units
mixture
mesitylene/dioxane/6
M
acetic
acid
under
solvothermal
conditions.
The
phase
purity,
thermal
stability,
and
porosity
TFPC-DAB
were
established
various
analytical
techniques.
Utilizing
Density
Functional
Tight
Binding
(DFTB+)
simulation
Pawley
refinement,
best
fit
small
angle
x-ray
pattern
found
to
have
AA
stacking
space
group
P3
low
refinement
parameters.
Such
smart
materials
are
huge
demand
detect
hazardous
corrosive
chemicals,
HCl
NH3.
dual
features
electron
deficient
π-acidic
triazine
moiety
heteroatoms
(N/O)
from
TFPC
rich
phenyl
DAB
embodied
enhance
its
luminescent
property
thereby
make
it
suitable
for
solvent-based
NH3
sensing.
detection
limits
methanol
be
14
82
ppb,
respectively.
effect
solvent
polarity
on
sensing
studies
observed
much
lower
dioxane:
2.5
11
ppb
NH3,
A
detailed
theoretical
calculation
using
density
functional
theory
configurational
bias
Monte
Carlo
modules
conducted
understanding
interactions
between
COF
analytes.
