Covalent
organic
frameworks
(COFs)
are
a
class
of
porous
materials
with
exceptional
crystallinity,
porosity,
and
well-defined
structure,
which
crucial
for
detection
removal
applications.
In
this
study,
we
report
the
synthesis
emissive
stable
COFs
via
Schiff
base
condensation
reaction.
The
stability,
emission
properties
TT-COFs
attributed
to
intramolecular
hydrogen
bonding
between
OH
units
imine
bonds.
Through
π–π
stacking
interactions
adsorbed
bisphenol
molecules
COF
host,
demonstrate
sensitivity
selectivity
toward
A
(BPA)
in
water,
achieving
lower
limit
through
quenching
placing
them
among
best-reported
sensor
systems.
Additionally,
exhibit
rapid
adsorption
BPA
high
performance
(548
mg
g–1)
at
room
temperature,
along
efficient
sustained
cyclic
capability
without
significant
efficiency
loss.
This
research
represents
advancement
COF-based
approaches
substance
water
treatment.
Smart Molecules,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 4, 2024
Abstract
Azobenzene
and
its
derivatives
are
the
most
extensively
investigated
applied
molecular
photoswitches,
which
can
undergo
reversible
transformation
between
trans
cis
isomers
upon
irradiation
with
light
at
specific
wavelengths.
Through
structural
geometry
transformation,
property
alterations
be
integrated
into
smart
materials
to
meet
diverse
application
requirements.
Most
azo‐based
photoswitches
require
UV
for
activation.
However,
complete
activation
within
visible
or
even
near‐infrared
range
could
offer
several
benefits
photoswitch
applications,
including
improved
biocompatibility,
better
penetration,
enhanced
solar
utilization
efficiency.
This
review
presents
an
overview
of
development
visible‐light
responsive
materials,
covering
design
strategies
their
applications
in
energy
storage.
Recent
efforts
aimed
enhancing
performance
storage
highlighted.
According
different
improving
properties,
these
categorized
as
those
that
directly
increase
isomerization
introduce
phase
transition
energy.
Furthermore,
we
discuss
challenges
opportunities
this
field
a
view
inspire
further
exploration.
Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(45)
Published: July 18, 2024
Abstract
Helicenes
represent
a
class
of
fascinating
π
compounds
with
fused
yet
folded
backbones.
Despite
their
broad
structural
diversity,
harnessing
helicenes
to
develop
well‐defined
materials
is
still
formidable
challenge.
Here
we
report
the
synthesis
crystalline
porous
helicene
by
exploring
synthesize
covalent
2D
lattices
and
layered
frameworks.
Topology‐directed
polymerization
[6]helicenes
porphyrin
creates
networks
alternate
helicene‐porphyrin
alignment
along
x
y
directions
at
1.5‐nm
interval
develops
[6]helicene
frameworks
through
reversed
anti‐AA
stack
z
direction
form
segregated
columnar
arrays.
Notably,
this
configuration
enables
be
highly
red
luminescent
benchmark
quantum
yields.
The
trigger
effieicnt
intra‐framework
singlet‐to‐singlet
state
energy
transfer
from
facilitate
intermolecular
triplet‐to‐triplet
molecular
oxygen
produce
reactive
species,
harvesting
wide
range
photons
ultraviolet
near‐infrared
regions
for
light
emitting
photo‐to‐chemical
conversion.
This
study
introduces
new
family
extended
frameworks,
laying
groundwork
unprecedented
structures
functions.
Polymer Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
Two
emissive
hydrazone-linked
COFs
with
abundance
of
interaction
sites
were
synthesized,
showing
high
sensitivity
and
selectivity
for
hydrazine
sensing.
Covalent
organic
frameworks
(COFs)
are
a
class
of
porous
materials
with
exceptional
crystallinity,
porosity,
and
well-defined
structure,
which
crucial
for
detection
removal
applications.
In
this
study,
we
report
the
synthesis
emissive
stable
COFs
via
Schiff
base
condensation
reaction.
The
stability,
emission
properties
TT-COFs
attributed
to
intramolecular
hydrogen
bonding
between
OH
units
imine
bonds.
Through
π–π
stacking
interactions
adsorbed
bisphenol
molecules
COF
host,
demonstrate
sensitivity
selectivity
toward
A
(BPA)
in
water,
achieving
lower
limit
through
quenching
placing
them
among
best-reported
sensor
systems.
Additionally,
exhibit
rapid
adsorption
BPA
high
performance
(548
mg
g–1)
at
room
temperature,
along
efficient
sustained
cyclic
capability
without
significant
efficiency
loss.
This
research
represents
advancement
COF-based
approaches
substance
water
treatment.
