Small Methods,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 11, 2024
Abstract
In
order
to
improve
the
solubility
of
metallated
monomers
and
product
crystallinity,
metal–covalent
organic
frameworks
(MCOFs)
are
commonly
prepared
via
high‐temperature
sol‐vothermal
synthesis.
However,
it
hampers
direct
extraction
crystallization
evolution
information.
Exploring
facile
room‐temperature
strategies
for
both
synthesizing
MCOFs
exploiting
crystallinity
mechanism
is
extremely
desired.
Herein,
by
a
novel
single‐phase
synthetic
strategy,
three
with
different
microstructure
rapidly
based
on
Schiff
base
reaction
between
planarity‐tunable
C
3v
at
room
temperature.
Based
detailed
time‐dependent
experiments
theoretical
calculations,
found
that
there
planarity‐tuned
competitive
growth
relationship
disordered
structures
crystal
nucleus
first
time.
The
high
planarity
boosts
formation
rapid
growth,
suppressing
forming
amorphous
structures.
addition,
microenvironment
effect
selective
photocatalytic
coupling
benzylamine
(BA)
investigated.
strong
donor‐acceptor
(D‐A)
MCOF
exhibits
efficient
activity
conversion
rate
99%
selectivity
in
5
h
under
520
nm
light
irradiation.
This
work
opens
new
pathway
scalable
synthesis
highly
crystalline
MCOFs.
Accounts of Chemical Research,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 21, 2025
ConspectusMetal-organic
frameworks
(MOFs)
and
covalent
organic
(COFs),
as
emerging
porous
crystalline
materials,
have
attracted
remarkable
attention
in
chemistry,
physics,
materials
science.
MOFs
are
constructed
by
metal
clusters
(or
ions)
linkers
through
coordination
bonds,
while
COFs
prepared
pure
building
blocks
via
bonds.
Because
of
the
nature
linkages,
their
own
shortcomings.
Typically,
relatively
weak
bond
strengths
bonds
lead
to
poor
chemical
stability
MOFs,
which
limits
practical
implementations.
On
other
hand,
due
strong
exhibit
rather
higher
under
harsh
conditions,
compared
MOFs.
However,
lack
open
sites
restricts
functionalization
application.
Therefore,
it
is
hypothesized
that
"cream-skimming"
would
address
these
drawbacks
produce
a
new
class
material,
namely,
metal-organic
(CMOFs),
with
unprecedented
structural
complexity
advanced
functionality.
The
CMOFs
reveal
synthetic
approach
for
preparation
reticular
materials.
Specifically,
ions
reacted
chelating
ligands
assemble
complexes
or
functional
reactive
(e.g.,
-CHO,
-NH2),
can
be
further
connected
form
networked
structures
dynamic
chemistry
(DCC).
isolated
complex
cluster
precursors
show
enhanced
prevents
decomposition
rearrangements
during
self-assembly
process
CMOFs.
Since
topology
preassembled
nodes
well-defined,
structure
readily
predicted
upon
directed
networking
Unaccessible
from
unstable
highly
ion/clusters
traditional
conditions
DCC
approach.
Moreover,
synergize
advantages
COFs,
containing
active
ensuring
various
interesting
properties,
linkages
allow
high
even
conditions.
In
past
few
years,
our
group
has
specifically
focused
on
development
general
strategies
coinage
(Cu,
Ag,
Au)-based
cyclic
trinuclear
units
(CTUs)
DCC.
CTUs
trigonal
planar
functionalized
sites,
such
-NH2
react
afford
Notably,
also
features
properties
including
metallophilic
attraction,
π-acidity/basicity,
luminescence,
redox
activity
catalytic
activity,
incorporated
into
we
envision
promising
platforms
not
only
novel
but
potential
applications
many
research
fields
gas
absorption/separation,
sensing,
full-color
display,
catalysis,
energy,
biological
applications.
this
Account,
summarize
recent
studies
CMOFs,
starting
linkage
topological
design,
transformation,
morphological
control,
fields.
We
discuss
future
opportunities
challenges
rapidly
developed
field
hope
Account
may
promote
scientific
discoveries
CMOF-based
technologies
future.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 9, 2024
Abstract
The
global
energy
crisis
and
environmental
concerns
are
driving
research
into
renewable
sustainable
conversion
storage
technologies.
Solar
energy,
as
an
ideal
resource,
has
significant
potential
to
contribute
the
goal
of
net‐zero
carbon
emissions
if
effectively
harnessed
converted
a
reliable
storable
form
energy.
Photocatalysts
have
convert
sunlight
chemical
carriers.
In
this
respect,
covalent
organic
frameworks
(COFs)
shown
great
promise
due
their
tunable
structure
on
different
length
scales,
high
surface
areas,
beneficial
optical
properties
such
broad
visible
light
absorption.
This
review
offers
comprehensive
overview
key
developments
in
COF‐based
photocatalysts
for
various
applications,
including
water
splitting,
hydrogen
peroxide
generation,
transformations,
dioxide
nitrogen
reduction.
underlying
mechanisms,
essential
principles
material
design,
structure‐function
relationships
COFs
photocatalytic
applications
discussed.
challenges
faced
by
also
summarized
strategies
enhance
performance
explained,
improving
crystallinity,
regulating
molecular
structures,
tailoring
linkages,
incorporating
cocatalysts.
Finally,
critical
proposed
utilization
photocatalytically
generated
chemicals
value‐added
products.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 27, 2024
Abstract
Photocatalysis
leverages
solar
energy
to
overcome
the
thermodynamic
barrier,
enabling
efficient
chemical
reactions
under
mild
conditions.
It
can
greatly
reduce
reliance
on
traditional
sources
and
has
attracted
significant
research
interest.
Reticular
materials,
including
metal‐organic
frameworks
(MOFs)
covalent
organic
(COFs),
represent
a
class
of
crystalline
materials
constructed
from
molecular
building
blocks
linked
by
coordination
bonds,
respectively.
function
as
heterogeneous
catalysts,
combining
well‐defined
structures
high
tailorability
akin
homogeneous
catalysts.
In
this
review,
regulation
light
absorption,
charge
separation,
surface
in
photocatalytic
process
through
precise
molecular‐level
design
based
features
reticular
is
elaborated.
Notably,
for
MOFsmicroenvironment
modulation
around
catalytic
sites
affects
performance
delved,
with
emphasis
their
unique
dynamic
flexible
microenvironments.
For
COFs,
inherent
excitonic
effects
due
fully
nature
discussed
highlight
strategies
regulate
charge‐
and/or
energy‐transfer‐mediated
photocatalysis.
Finally,
current
challenges
future
directions
field,
aiming
provide
comprehensive
understanding
how
be
optimized
enhanced
photocatalysis
discussed.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 26, 2025
Abstract
Covalent
organic
frameworks
(COFs),
known
for
the
precise
tunability
of
molecular
structures,
hold
significant
promise
photocatalytic
hydrogen
peroxide
(H
2
O
)
production.
Herein,
by
systematically
altering
quinoline
(QN)
linkages
in
triazine
(TA)‐based
COFs
via
multi‐component
reactions,
six
R‐QN‐TA‐COFs
are
synthesized
with
identical
skeletons
but
different
substituents.
The
fine‐tuning
optoelectronic
properties
and
local
microenvironment
is
allowed,
thereby
optimizing
charge
separation
improving
interactions
dissolved
oxygen.
Consequently,
MeO‐QN‐TA‐COF
customized
to
achieve
an
impressive
rate
H
production
up
7384
µmol
g⁻
1
h⁻
under
air
atmosphere
water
without
any
sacrificial
agents,
surpassing
most
reported
COF
photocatalysts.
Its
high
stability
demonstrated
through
five
consecutive
recycling
experiments
characterization
recovered
COF.
reaction
mechanism
further
investigated
using
a
suite
quenching
experiments,
situ
spectroscopic
analysis,
theoretical
calculations.
enhanced
over
2e⁻
oxygen
reduction
oxidation
pathways.
Overall,
crucial
role
linkage
modulation
design
solar‐driven
effective
Angewandte Chemie International Edition,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 9, 2025
Photo/electro-catalytic
CO2
reduction
into
high-value
products
are
promising
strategies
for
addressing
both
environmental
problems
and
energy
crisis.
Duo
to
their
advantageous
visible
light
absorption
ability,
adjustable
optic/electronic
properties,
definite
active
center,
post-modification
capability,
excellent
stability,
porphyrin-based
covalent
organic
frameworks
(COFs)
have
emerged
as
attractive
photo/electro-catalysts
towards
reduction.
In
this
review,
the
research
progress
of
COFs
photo/electro-catalytic
is
summarized
including
design
principles,
catalytic
performance,
reaction
mechanism.
addition,
review
also
presents
some
challenges
prospects
application
in
reduction,
laying
base
fundamental
efforts.
Chemical Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
A
novel
CdS@NiV-LDH
heterojunction
with
an
optimized
electric
field
microenvironment
and
reaction
has
been
constructed
for
the
photocatalytic
reduction
of
CO
2
to
tunable
green
syngas
by
rationally
modulating
PCET
process.
