Chemical Science,
Journal Year:
2024,
Volume and Issue:
15(45), P. 18818 - 18824
Published: Jan. 1, 2024
A
chiral
ionic
organic
single-crystal
(CIOC)
was
prepared
for
the
first
time
through
self-assembly
using
bipyridium
liquid
(CIL)
and
4,4'-biphenyldisulfonic
acid
(BDA).
The
CIOC
can
be
ultrasonically
exfoliated
to
produce
two-dimensional
nanosheets
(2D-NSs).
2D-NSs
presented
enhanced
enantioseparation
compared
CIL
when
used
as
gas
chromatography
stationary
phase,
which
may
due
exhibiting
greater
exposure
of
functional
groups.
Additionally,
better
resolution
other
compounds
such
positional
isomers,
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(29), P. 19680 - 19685
Published: July 9, 2024
The
pore
shapes
of
two-dimensional
covalent
organic
frameworks
(2D
COFs)
significantly
limit
their
practical
applications
in
separation
and
catalysis.
Although
various
2D
COFs
with
polygonal
pores
have
been
well
developed,
constructing
pentagonal
remains
an
enormous
challenge.
In
this
work,
we
developed
one
kind
the
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 2, 2025
The
development
of
new
chiral
building
blocks
for
constructing
complex
architectures,
such
as
macrocycles
and
cages,
is
both
crucial
challenging.
Although
concave-shaped
calixarenes
have
been
established
versatile
the
synthesis
cage
compounds,
there
are
no
reports
on
cages
constructed
from
calix[4]arene
derivatives.
Herein,
we
present
a
straightforward
effective
method
gram-scale
member
macrocycle
enantiomers,
namely,
phenol[4]arene
(PC[4]A).
As
proof
concept,
functionalized
these
enantiomers
into
tetraformylphenol[4]arene
(PC[4]ACHO)
derivatives
via
Duff
reaction
to
construct
porous
organic
(CPOCs)
using
polyamine
synthons.
Specifically,
employ
two
fluorescent
amine
synthons,
bis(4-aminophenyl)phenylamine
tris(4-aminophenyl)amine,
assemble
with
PC[4]ACHO
resulting
in
[2
+
4]
lantern-shaped
[6
8]
truncated
octahedral
CPOCs,
respectively.
These
structures
unambiguously
characterized
by
single-crystal
X-ray
diffraction
circular
dichroism
(CD)
spectroscopy.
Notably,
CPOCs
exhibit
internal
diameters
approximately
3.1
nm,
cavity
volume
around
5300
Å3,
high
specific
surface
areas
up
1300
m2
g-1
after
desolvation,
making
them
among
largest
reported.
Additionally,
investigations
their
sensing
performance
demonstrate
that
PC[4]A-based
enable
enantioselective
recognition
amino
acids
This
work
strongly
suggests
PC[4]A
can
serve
an
excellent
block
rational
design
materials
practical
applications.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
unknown
Published: April 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
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
64(1)
Published: Sept. 27, 2024
Abstract
Exploring
new
strategies
for
construction
of
chiral
covalent
organic
frameworks
(COFs)
is
paramount
importance
yet
remains
a
challenge.
Herein,
we
report
the
rational
design
and
COFs
through
linker
decomposition
induction
(LDCI)
strategy.
Three
pairs
azine‐linked
are
successfully
synthesized
by
condensation
reactions
C
3
‐symmetric
4,4′,4′′‐(1,3,5‐triazine‐2,4,6‐triyl)tribenzaldehyde
(Tz)
with
flexible
dihydrazide
linkers
derived
from
malic
acid,
aspartic
acid
tartaric
respectively.
Remarkably,
upon
complete
or
partial
dihydrazides
to
hydrazine
during
COF
synthesis,
homochirality
these
COFs,
originating
single‐handedness
conformation
propeller‐like
Tz
cores,
well
preserved.
Such
stereoselective
memory
realized
via
LDCI
strategy
confirmed
time‐dependent
powder
X‐ray
diffraction
(PXRD),
Fourier
transform
infrared
(FT‐IR)
diffuse
reflectance
circular
dichroism
(DRCD).
Moreover,
resultant
used
as
active
materials
fabricate
photodetectors
directly
distinguish
circularly
polarized
light
(CPL),
showing
impressive
recognition
performances
on
identification
left‐handed
(LHC)
right‐handed
(RHC)
lights.
Notably,
residual
undecomposed
within
found
be
conducive
improving
polarization
discrimination
ratio.
This
work
highlights
effective
constructing
homochiral
promising
future
in
optical
application.
Chemical Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
Recent
advances
and
outlook
of
porous
organic
cage-based
materials
(pristine
POCs,
POC
composites
derivatives)
in
the
field
energy
applications,
including
photocatalysis,
electrocatalysis,
separation,
batteries
proton
conductivity.
Journal of Separation Science,
Journal Year:
2025,
Volume and Issue:
48(2)
Published: Feb. 1, 2025
ABSTRACT
Chiral
covalent
organic
frameworks
(CCOFs)
are
emerging
porous
materials
with
tunable
chiral
structures,
abundant
pores,
and
high
surface
areas,
gaining
significant
attentions
in
separation,
sensing,
asymmetric
catalysis.
This
review
summarizes
the
synthesis
methods
of
CCOFs
their
applications
recognition.
It
discusses
advantages
limitations
three
strategies,
including
post‐modification,
direct
synthesis,
chiral‐induced
synthesis.
The
also
highlights
potential
catalysis
for
efficient
purification,
detection,
molecules.
Challenges
future
directions
preparation
application
addressed,
aiming
to
guide
further
research
practical
applications.
