Angewandte Chemie,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 5, 2024
Abstract
Lithium
(Li)
metal
batteries
with
remarkable
energy
densities
are
restrained
by
short
lifetime
and
low
Coulombic
efficiency
(CE),
resulting
from
the
accumulative
Li
dendrites
dead
during
cycling.
Here,
we
prepared
a
new
three‐dimensional
(3D)
covalent
organic
framework
(COF)
dense
lithiophilic
sites
(heteoatom
weight
contents
of
32.32
wt
%)
as
an
anodic
protective
layer
batteries.
The
3D
COF
was
synthesized
using
[6+4]
synthesis
strategy
inducing
flexible
6‐connected
cyclotriphosphazene
derivative
aldehyde
4‐connected
porphyrin‐based
tetraphenylamines.
Both
phosphazene
porphyrin
rings
in
served
electron‐rich
sites,
enhancing
homogeneous
+
flux
via
direction
towards
highly
smooth
compact
deposition.
Li/Por‐PN‐COF‐Cu
cells
achieved
record
average
CE
99.1
%
for
320
cycles
Meanwhile,
abundant
can
promote
fast
transport
transference
number
0.87,
enabling
LiFePO
4
full
cell
stable
stripping/plating
processes
even
at
harsh
rate
5
C.
Theoretical
calculations
revealed
that
strong
interaction
force
between
facilitated
dissolution
electrolyte,
migration
barrier
1.08
eV
indicated
favorable
ions
π‐electron
system.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(47), С. 32161 - 32205
Опубликована: Ноя. 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,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 5, 2024
Lithium
(Li)
metal
batteries
with
remarkable
energy
densities
are
restrained
by
short
lifetime
and
low
Coulombic
efficiency
(CE),
resulting
from
the
accumulative
Li
dendrites
dead
during
cycling.
Here,
we
prepared
a
new
three-dimensional
(3D)
covalent
organic
framework
(COF)
dense
lithiophilic
sites
(heteoatom
weight
contents
of
32.32
wt
%)
as
an
anodic
protective
layer
batteries.
The
3D
COF
was
synthesized
using
[6+4]
synthesis
strategy
inducing
flexible
6-connected
cyclotriphosphazene
derivative
aldehyde
4-connected
porphyrin-based
tetraphenylamines.
Both
phosphazene
porphyrin
rings
in
served
electron-rich
sites,
enhancing
homogeneous
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
64(1)
Опубликована: Авг. 16, 2024
The
design
of
three-dimensional
covalent
organic
frameworks
(3D
COFs)
using
linear
and
trigonal
linkers
remains
challenging
due
to
the
difficulty
in
achieving
a
specific
non-planar
spatial
arrangement
with
low-connectivity
building
units.
Here,
we
report
novel
3D
COFs
linkers,
termed
TMB-COFs,
exhibiting
srs
topology.
steric
hindrance
provides
an
additional
force
alter
torsion
angles
peripheral
triangular
units,
guiding
unit
connect
into
frameworks,
rather
than
more
commonly
observed
two-dimensional
(2D)
hcb
structures.
Furthermore,
comprehensively
examined
hydrogen
peroxide
photocatalytic
production
capacity
TMB-COFs
comparison
analogous
2D
COFs.
experimental
results
DFT
calculations
demonstrate
significant
enhancement
efficacy
through
framework
regulation.
This
work
emphasizes
configuration
low
connectivity
offering
fresh
perspective
on
application
Angewandte Chemie International Edition,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 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.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
unknown
Опубликована: Апрель 12, 2024
Unraveling
the
mechanism
of
chirality
transfer
across
length
scales
is
crucial
to
rational
development
functional
materials
with
hierarchical
chirality.
The
key
obstacle
lack
structural
information,
especially
at
mesoscopic
level.
We
report
herein
identification
helical
covalent
organic
frameworks
(heliCOFs)
chirality,
which
integrate
molecular
channel
and
morphology
into
one
crystalline
entity.
Specifically,
benefiting
from
highly
ordered
structure
heliCOFs,
existence
chiral
channels
level
has
been
confirmed
by
electron
crystallography,
handedness
these
directly
determined
through
stereopair
imaging
technique.
Accordingly,
in
heliCOFs
microscopic
macroscopic
levels
could
be
rationalized
a
layer-rotating
model
that
supported
both
crystal
analysis
theoretical
calculations.
Observation
not
only
provides
unprecedented
data
for
understanding
process
but
also
sheds
new
light
on
construction
polymeric
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 30, 2024
Asymmetric
catalysis
is
essential
for
addressing
the
increasing
demand
enantiopure
compounds.
Recent
advances
in
reticular
chemistry
have
demonstrated
that
metal-organic
frameworks
(MOFs)
and
covalent
organic
(COFs)
possess
highly
regular
porous
architectures,
exceptional
tunability,
ability
to
incorporate
chiral
functionalities
through
their
open
channels
or
cavities.
These
characteristics
make
them
effective
enantioselective
catalysts
a
wide
range
of
asymmetric
transformations.
The
microenvironments
within
these
facilitate
precise
control
over
reactant
orientation
transition
states,
enhancing
both
catalytic
activity
enantioselectivity,
thereby
offering
significant
advantages
traditional
systems.
This
review
overviews
recent
developments
MOFs
(CMOFs)
COFs
(CCOFs),
focusing
on
design
strategies,
synthetic
methods,
highlights
structure-property
relationships
connect
key
structural
features
performance.
Additionally,
current
challenges
future
prospects
this
field
are
addressed,
highlighting
pivotal
role
creation
materials.
It
anticipated
will
inspire
further
research
into
application
crystalline
materials
promote
rational
novel
heterogeneous
industrial
use.
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 8, 2025
The
diversity
of
covalent
organic
frameworks
(COFs)
is
continuously
expanding,
providing
various
materials
with
tailor-made
structures
and
properties.
However,
the
development
crystalline
three-dimensional
(3D)
COFs
new
topologies
an
essential
but
arduous
challenge.
In
this
study,
we
first
developed
one
kind
3D
lil
topological
structure,
which
were
assembled
by
D4h-
C2h-symmetric
building
blocks.
determined
in
a
space
group
Imma,
each
D4h-symmetric
unit
connected
four
units,
forming
noninterpenetrated
network.
densely
packed
copper
phthalocyanine
stable
polyimide
linkage
render
these
as
polymeric
material
high
dielectric
constant
low
loss
at
frequencies
(>1
kHz).
Significantly,
was
63,
constitutes
record
value
among
phthalocyanine-based
polymers.
Therefore,
study
not
only
provides
important
guidance
for
design
lil-net
also
supplies
promising
application
high-energy-density
pulsed
capacitors.
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY (CHINESE VERSION),
Год журнала:
2024,
Номер
52(4), С. 100391 - 100391
Опубликована: Апрель 1, 2024
Chirality,
also
known
as
handedness,
is
one
of
the
most
widespread
and
intriguing
properties
in
nature,
touching
upon
various
fields
including
physics,
chemistry,
biology,
medicine
beyond.
Chiral
interface
place
where
chirality
related
process
occurs.
The
development
synthetic
chiral
not
only
deepens
understanding
mechanism,
but
provides
basis
for
application
phenomenon.
In
this
review,
we
provide
a
summary
types
interfaces,
their
construction
methods,
recent
recognition,
separation,
catalysis,
well
prospect
further
direction.
