Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(42), С. 28932 - 28940
Опубликована: Окт. 11, 2024
Single-crystalline
covalent
organic
frameworks
(COFs)
are
highly
desirable
toward
understanding
their
pore
chemistry
and
functions.
Herein,
two
50–100
μm
single-crystalline
three-dimensional
(3D)
COFs,
TAM-TFPB-COF
TAPB-TFS-COF,
were
prepared
from
the
condensation
of
4,4′,4″,4‴-methanetetrayltetraaniline
(TAM)
with
3,3′,5,5′-tetrakis(4-formylphenyl)bimesityl
(TFPB)
3,3′,5,5′-tetrakis(4-aminophenyl)bimesityl
(TAPB)
4,4′,4″,4‴-silanetetrayltetrabenzaldehyde
(TFS),
respectively,
in
1,4-dioxane
under
catalysis
acetic
acid.
Single-crystal
3D
electron
diffraction
reveals
triply
interpenetrated
dia-b
networks
atom
resolution,
while
isostructure
TAPB-TFS-COF
was
disclosed
by
synchrotron
single-crystal
X-ray
powder
Le
Bail
refinements.
The
nitrogen
sorption
measurements
at
77
K
disclose
microporosity
nature
both
activated
COFs
exceptionally
high
Brunauer–Emmett–Teller
surface
areas
3533
4107
m2
g–1,
representing
thus
far
record
specific
area
among
imine-bonded
COFs.
This
enables
to
exhibit
also
methane
uptake
capacities
up
28.9
wt
%
(570
cm3
g–1)
25
°C
200
bar
all
reported
far.
work
not
only
presents
structures
exceptional
but
provides
an
example
engineering
adjust
permanent
microporous
for
storage.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(15)
Опубликована: Фев. 9, 2024
Developing
high
connectivity
(>8)
three-dimensional
(3D)
covalent
organic
frameworks
(COFs)
towards
new
topologies
and
functions
remains
a
great
challenge
owing
to
the
difficulty
in
getting
building
blocks.
This
however
represents
most
important
step
promoting
diversity
of
COFs
due
still
limited
dynamic
bonds
available
for
constructing
at
this
stage.
Herein,
highly
connected
phthalocyanine-based
(Pc-based)
3D
MPc-THHI-COFs
(M=H
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(52)
Опубликована: Авг. 27, 2024
Abstract
Herein,
a
rational
strategy
is
presented
to
reduce
the
energy
barrier
of
singlet
ground
state
excited
transitions,
whilst
simultaneously
reducing
losses
in
populating
triplet
states.
The
approach
relies
on
constructing
3D
space
connected
donor–acceptor
systems
COFs.
D–A
system
8‐connected
COFs
(denoted
as
COF‐1
and
COF‐2)
allows
efficient
transfer
electrons,
overcoming
traditional
electron
transport
limitations
2D
significantly
boosting
solar
utilization
efficiency
under
visible
light
irradiation.
COF‐2,
possessing
an
extended
π‐conjugated
structure
relative
COF‐1,
demonstrated
high
selectivity
for
photocatalytic
generation
H
2
O
(6.93
mmol
g
−1
h
)
natural
seawater
without
need
sacrificial
reagents,
exceeding
performance
most
previously
reported
COF‐based
photocatalysts.
this
work
offers
new
optimizing
photocatalysts
production
other
applications.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(26)
Опубликована: Апрель 15, 2024
Abstract
The
synthesis
and
characterization
of
porphyrin
center
regulated
three‐dimensional
covalent
organic
frameworks
(COFs)
with
2‐fold
interpenetrated
scu
or
sqc
topology
have
been
investigated.
These
COFs
exhibit
unique
structural
features
properties,
making
them
promising
candidates
for
photocatalytic
applications
in
CO
2
reduction
artemisinin
synthesis.
serves
as
an
anchor
metal
ions,
allowing
precise
control
over
structures
functions
the
frameworks.
Furthermore,
coordination
within
framework
imparts
desirable
catalytic
enabling
their
potential
use
reactions.
Overall,
these
metal‐controlled
offer
exciting
opportunities
development
advanced
materials
tailored
functionalities.
Abstract
The
development
of
efficient
drug
delivery
systems
is
essential
for
improving
the
efficacy
and
safety
cancer
drugs,
particularly
aggressive
difficult‐to‐treat
cancers.
Covalent
organic
frameworks
(COFs)
are
emerging
as
innovative
porous
nanomaterials
in
(DDS),
due
to
their
unique
properties,
including
metal‐free
skeleton,
predetermined
structures
pore
geometries,
high
porosity,
large
surface
area,
facile
modification
potential,
good
biocompatibility.
These
characteristics
make
COFs
excellent
candidates
by
enhancing
loading
capacity
enabling
precise
encapsulation.
This
review
emphasizes
importance
donor‐acceptor‐based
COFs,
which
provide
channels
charge
transportation,
we
also
explore
how
π‐conjugated
skeleton
enhances
its
long‐acting
fluorescent
properties
facilitates
uptake
via
cell
endocytosis.
While
this
primarily
focuses
on
recent
advancements
COF‐based
targeted
DDS,
it
acknowledges
challenges
posed
diverse
geometries
materials
discusses
potential
solutions.
Further,
underlines
developing
future
carriers
that
can
successfully
specifically
target
cells,
treatment
efficiency
while
reducing
adverse
side
effects.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(42), С. 28932 - 28940
Опубликована: Окт. 11, 2024
Single-crystalline
covalent
organic
frameworks
(COFs)
are
highly
desirable
toward
understanding
their
pore
chemistry
and
functions.
Herein,
two
50–100
μm
single-crystalline
three-dimensional
(3D)
COFs,
TAM-TFPB-COF
TAPB-TFS-COF,
were
prepared
from
the
condensation
of
4,4′,4″,4‴-methanetetrayltetraaniline
(TAM)
with
3,3′,5,5′-tetrakis(4-formylphenyl)bimesityl
(TFPB)
3,3′,5,5′-tetrakis(4-aminophenyl)bimesityl
(TAPB)
4,4′,4″,4‴-silanetetrayltetrabenzaldehyde
(TFS),
respectively,
in
1,4-dioxane
under
catalysis
acetic
acid.
Single-crystal
3D
electron
diffraction
reveals
triply
interpenetrated
dia-b
networks
atom
resolution,
while
isostructure
TAPB-TFS-COF
was
disclosed
by
synchrotron
single-crystal
X-ray
powder
Le
Bail
refinements.
The
nitrogen
sorption
measurements
at
77
K
disclose
microporosity
nature
both
activated
COFs
exceptionally
high
Brunauer–Emmett–Teller
surface
areas
3533
4107
m2
g–1,
representing
thus
far
record
specific
area
among
imine-bonded
COFs.
This
enables
to
exhibit
also
methane
uptake
capacities
up
28.9
wt
%
(570
cm3
g–1)
25
°C
200
bar
all
reported
far.
work
not
only
presents
structures
exceptional
but
provides
an
example
engineering
adjust
permanent
microporous
for
storage.
