Angewandte Chemie,
Год журнала:
2024,
Номер
137(1)
Опубликована: Сен. 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.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(50)
Опубликована: Авг. 28, 2024
Abstract
Exploring
self‐standing
chiral
covalent
organic
framework
(COF)
thin
films
with
controllable
circularly
polarized
luminescence
(CPL)
is
of
paramount
significance
but
remains
a
challenging
task.
Herein,
we
demonstrate
the
first
example
COF
employing
polymerization‐dispersion‐filtration
strategy.
Pristine,
low‐quality
were
produced
by
interfacial
polymerization
and
then
re‐dispersed
into
colloidal
solutions.
Via
vacuum
assisted
assembly,
these
colloids
densely
stacked
assembled
self‐standing,
pure
(
L‐
/
D‐
CCOF‐F)
that
transparent,
smooth,
crack‐free
highly
crystalline.
These
tunable
in
thicknesses,
areas,
roughness,
along
strong
diffuse
reflectance
circular
dichroism
(DRCD)
cyan
CPL
signals,
showing
an
intrinsic
asymmetric
factor
g
lum
)
~4.3×10
−3
.
Furthermore,
served
as
host
adsorbents
to
load
various
achiral
dye
guests
through
adsorption.
The
effective
transfer
energy
between
CCOF‐F
fluorescent
dyes
endowed
chirality
DRCD,
resulting
intense,
full‐color‐tunable
solid‐state
CPL.
Notably,
ordered
arrangement
guest
molecules
within
preferentially
oriented
pores
contributed
amplified
|
up
7.2×10
−2
,
which
state‐of‐the‐art
for
COF‐based
materials.
This
work
provides
new
insights
design
fabrication
films,
demonstrating
their
great
potential
chiroptical
applications.
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 Separation Science,
Год журнала:
2025,
Номер
48(2)
Опубликована: Фев. 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.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
64(1)
Опубликована: Сен. 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.
Chemistry - An Asian Journal,
Год журнала:
2024,
Номер
19(20)
Опубликована: Авг. 13, 2024
The
design
and
synthesis
of
chiral
covalent
organic
frameworks
(COFs)
with
controlled
defect
sites
are
highly
desirable
but
still
remain
largely
unexplored.
Herein,
we
report
the
a
defective
HD-TAPB-DMTP
COF
by
modifying
monomer
helicid
(HD)
into
framework
an
achiral
imine-linked
TAPB-DMTP
using
exchange
strategy.
Upon
introduction
HD
unit,
obtained
not
only
displays
excellent
crystallinity,
large
specific
surface
area
(up
to
2338
m
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(43), С. 59379 - 59387
Опубликована: Окт. 17, 2024
Aqueous
asymmetric
catalysis
using
chiral
covalent
organic
frameworks
(COFs)
represents
a
significant
advancement
but
remains
to
be
explored.
Herein,
we
present
the
first
example
of
aqueous
catalyzed
by
primary
amine-tagged
D-ADP-TAPB
COF.
The
COF
was
synthesized
postsynthetic
deprotection
D-ADP-TAPB-Boc
bearing
protective
tert-butoxycarbonyl
(Boc)
group,
which
constructed
Schiff-base
reaction
between
an
alanine-derived
building
block
(D-ADP-Boc)
and
1,3,5-tris(4-aminophenyl)benzene
(TAPB).
crystalline
exhibits
uniform,
spherical
morphology
with
abundant,
well-distributed
amines,
rendering
it
highly
active
in
aldol
cyclohexanone
4-nitrobenzaldehyde.
Notably,
this
is
conducted
entirely
water,
achieving
impressive
yields
enantiomeric
excess
(ee)
values
up
90
85%,
respectively.
To
best
our
knowledge,
catalyst
high
reactivity
enantioselectivity
for
solely
eliminating
need
conventional
solvents.
Moreover,
plausible
mechanism
COF-mediated
reactions
elucidated.
This
work
not
only
expands
toolbox
designing
rare
amine-functionalized
COFs
also
opens
exciting
avenues
developing
green
water-based
enantioselective
catalysis.
