Chemical Science,
Год журнала:
2024,
Номер
15(6), С. 1924 - 1937
Опубликована: Янв. 1, 2024
Porous
organic
frameworks
(POFs)
are
novel
porous
materials
that
have
attracted
much
attention
due
to
their
extraordinary
properties,
such
as
high
specific
surface
area,
tunable
pore
size,
stability
and
ease
of
functionalisation.
However,
conventional
synthesised
POFs
mostly
large-sized
particles
or
insoluble
powders,
which
difficult
recycle
low
mass
transfer
efficiencies,
limiting
the
development
cutting-edge
applications.
Therefore,
processing
POF
into
membrane
structures
is
great
significance.
In
recent
years,
interface
engineering
strategies
proved
be
efficient
methods
for
formation
membranes.
this
perspective,
advances
in
use
interfaces
prepare
membranes
reviewed.
The
challenges
strategy
potential
applications
formed
discussed.
RSC Advances,
Год журнала:
2024,
Номер
14(29), С. 20609 - 20645
Опубликована: Янв. 1, 2024
The
photocatalytic
field
revolves
around
the
utilization
of
photon
energy
to
initiate
various
chemical
reactions
using
non-adsorbing
substrates,
through
processes
such
as
single
electron
transfer,
or
atom
transfer.
Eco-Environment & Health,
Год журнала:
2023,
Номер
2(3), С. 117 - 130
Опубликована: Июль 13, 2023
To
date,
significant
efforts
have
been
devoted
to
eliminating
hazardous
components
purify
wastewater
through
the
development
of
various
nanomaterials.
Covalent
organic
frameworks
(COFs),
an
important
branch
porous
crystalline
family,
possess
peculiarity
ultrahigh
surface
area,
adjustable
pore
size,
and
facile
functionality.
Exciting
studies
from
design
fabrication
potential
applications
in
water
treatment
by
COF-based
membranes
(COMs)
emerged.
This
review
summarizes
preparation
strategies
synthesis
mechanisms
for
COMs,
including
layer-by-layer
stacking,
situ
growth,
interfacial
polymerization,
electrochemical
synthesis,
briefly
describes
advanced
characterization
techniques
COMs.
Moreover,
application
COMs
heavy
metal
removal,
dye
separation,
purification
radionuclides,
pollutant
detection,
sea
desalination,
so
on,
is
described
discussed.
Finally,
perspectives
on
future
opportunities
designing
proposed.
Chemical Reviews,
Год журнала:
2024,
Номер
124(12), С. 7829 - 7906
Опубликована: Июнь 3, 2024
Covalent
network
polymers,
as
materials
composed
of
atoms
interconnected
by
covalent
bonds
in
a
continuous
network,
are
known
for
their
thermal
and
chemical
stability.
Over
the
past
two
decades,
these
have
undergone
significant
transformations,
gaining
properties
such
malleability,
environmental
responsiveness,
recyclability,
crystallinity,
customizable
porosity,
enabled
development
integration
dynamic
chemistry
(DCvC).
In
this
review,
we
explore
innovative
realm
polymers
focusing
on
recent
advances
achieved
through
application
DCvC.
We
start
examining
history
fundamental
principles
DCvC,
detailing
its
inception
core
concepts
noting
key
role
reversible
bond
formation.
Then
reprocessability
DCvC
is
thoroughly
discussed,
starting
from
milestones
that
marked
evolution
progressing
to
current
trends
applications.
The
influence
crystallinity
then
reviewed,
covering
diversity,
synthesis
techniques,
functionalities.
concluding
section,
address
challenges
faced
field
speculates
potential
future
directions.
Journal of the American Chemical Society,
Год журнала:
2023,
Номер
146(1), С. 742 - 751
Опубликована: Дек. 19, 2023
Covalent
organic
frameworks
(COFs)
are
usually
synthesized
under
solvothermal
conditions
that
require
the
use
of
toxic
solvents,
high
reaction
temperatures,
and
complicated
procedures.
Additionally,
their
insolubility
infusibility
present
substantial
challenges
in
processing
COFs.
Herein,
we
report
a
facile,
green
approach
for
synthesis
imine-linked
COFs
an
aqueous
solution
at
room
temperature.
The
key
behind
is
regulation
rate.
preactivation
aldehyde
monomers
using
acetic
acid
significantly
enhances
reactivity
solutions.
Meanwhile,
still
somewhat
lower
imine
formation
rate
higher
breaking
rates
solution,
contrast
to
conventional
synthesis,
allow
modulation
equilibrium
crystallization
products.
As
result,
highly
crystalline
with
large
surface
areas
can
be
formed
relatively
yields
few
minutes.
In
total,
16
successfully
from
different
molecular
sizes,
geometries,
pendant
groups,
core
structures,
demonstrating
versatility
this
approach.
Notably,
method
works
well
on
gram
scale
Furthermore,
facilitates
interfacial
growth
COF
nanolayers
cellulose
nanofibers
(CNFs).
resulting
CNF@COF
hybrid
easily
processed
into
freestanding
nanopapers,
efficiency
removing
trace
amounts
antibiotics
wastewater.
This
study
provides
route
various
COFs,
paving
way
practical
applications
diverse
fields.
Green Chemistry,
Год журнала:
2024,
Номер
26(5), С. 2645 - 2652
Опубликована: Янв. 1, 2024
A
unique
imine-based
covalent
organic
framework
heterogeneous
catalyst
with
missing-linker
defects
was
designed
and
synthesized,
the
exhibited
excellent
photocatalytic
activity
for
efficient
synthesis
of
tetrahydroquinolines.
Controllable
modulation
of
the
stacking
modes
2D
(two-dimensional)
materials
can
significantly
influence
their
properties
and
functionalities
but
remains
a
formidable
synthetic
challenge.
Here,
an
effective
strategy
is
proposed
to
control
layer
imide-linked
covalent
organic
frameworks
(COFs)
by
altering
methods.
Specifically,
modulator-assisted
method
afford
COF
with
rare
ABC
without
need
for
any
additives,
while
solvothermal
synthesis
leads
AA
stacking.
The
variation
interlayer
influences
chemical
physical
properties,
including
morphology,
porosity,
gas
adsorption
performance.
resultant
shows
much
higher
C2
H2
capacity
selectivity
over
CO2
H4
than
stacking,
which
not
demonstrated
in
field
yet.
Furthermore,
outstanding
practical
separation
ability
confirmed
breakthrough
experiments
/CO2
(50/50,
v/v)
/C2
(1/99,
v/v),
selectively
remove
good
recyclability.
This
work
provides
new
direction
produce
COFs
controllable
modes.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Май 8, 2024
Abstract
As
one
of
the
most
attractive
methods
for
synthesis
ordered
hierarchically
porous
crystalline
materials,
soft-template
method
has
not
appeared
in
covalent
organic
frameworks
(COFs)
due
to
incompatibility
surfactant
self-assembly
and
guided
crystallization
process
COF
precursors
phase.
Herein,
we
connect
soft
templates
backbone
through
ionic
bonds,
avoiding
their
incompatibilities,
thus
introducing
an
additional
arrangement
into
anionic
microporous
COFs.
The
ion
exchange
is
used
remove
while
maintaining
high
crystallinity
COFs,
resulting
construction
COFs
with
micropores/mesopores,
herein
named
OHMMCOFs
(OHMMCOF-1
OHMMCOF-2).
exhibit
significantly
enhanced
functional
group
accessibility
faster
mass
transfer
rate.
extrinsic
porosity
can
be
adjusted
by
changing
template
length,
concentration,
ratio.
Cationic
guanidine-based
(OHMMCOF-3)
are
also
constructed
using
same
method,
which
verifies
scalability
strategy.
This
work
provides
a
path
constructing
tunable
greatly
improved
efficiency
accessibility.
