Angewandte Chemie,
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 3, 2024
Abstract
Covalent
adaptable
networks
(CANs),
leveraging
the
dynamic
exchange
of
covalent
bonds,
emerge
as
a
promising
material
to
address
challenge
irreversible
cross‐linking
in
thermosetting
polymers.
In
this
work,
we
explore
introduction
catalyst‐free
and
associative
C=C/C=N
metathesis
reaction
into
polyurethanes,
creating
CANs
with
superior
stability,
solvent
resistance,
thermal/mechanical
properties.
By
incorporating
reaction,
stress‐relaxation
is
significantly
accelerated
compared
imine‐bond‐only
networks,
rate
adjustable
by
modifying
substituents
ortho
position
double
bonds.
The
obtained
plasticity
enables
recycle
without
altering
chemical
structure
or
mechanical
properties,
also
found
be
vital
for
achieving
shape
memory
functions
complex
spatial
structures.
This
new
crosslinker
polymer
has
potential
accelerate
ongoing
exploration
malleable
functional
thermoset
Advanced Materials,
Год журнала:
2024,
Номер
36(28)
Опубликована: Май 14, 2024
Abstract
Constructing
an
anti‐counterfeiting
material
with
non‐interference
dual
optical
modes
is
effective
way
to
improve
information
security.
However,
it
remains
challenging
achieve
multistage
secure
encryption
due
the
limited
stimulus
responsiveness
and
color
tunability
of
current
dual‐mode
materials.
Herein,
a
hydrogel
both
independently
tunable
structural
fluorescent
colors
toward
encryption,
reported.
In
this
system,
rigid
lamellar
structure
poly(dodecylglyceryl
itaconate)
(pDGI)
formed
by
shear
flow‐induced
self‐assembly
provides
restricted
domains
wherein
monomers
undergo
polymerization
form
network,
producing
color.
The
introduction
monomer
6‐acrylamidopicolinate
(6APA)
as
complexation
site
possibility
formation.
hydrogel's
angle‐dependent
can
be
controlled
adjusting
crosslinking
density
water
content.
Additionally,
fluorescence
modulated
ratio
lanthanide
ions.
Information
displayed
separately
in
different
channels
synergistically
overlayed
read
ultimate
message.
Thus,
system
based
on
devised
through
programed
decryption
process.
This
strategy
holds
tremendous
potential
platform
for
encrypting
safeguarding
valuable
authentic
field
anti‐counterfeiting.
Abstract
Room‐temperature
phosphorescence
(RTP)
materials
have
attracted
significant
attention
due
to
their
applications
in
various
fields
such
as
information
storage
and
encryption,
organic
light‐emitting
diode
(OLED),
sensing,
lighting
display,
biological
imaging,
photodynamic
therapy.
Traditionally,
RTP
can
be
efficiently
developed
using
inorganic
systems
with
noble
metals
or
rare
earth
elements.
Recently,
many
efforts
been
devoted
the
development
of
based
on
small
molecules.
The
strategies
construct
include
hydrogen
bonding,
heavy
atom
effect,
n
–π*
transitions,
π–π
stacking,
donor–acceptor
host–guest
doping.
Herein,
we
summarize
recent
examples
molecules
primarily
focusing
design
properties.
Moreover,
promising
OLED,
well
bio‐imaging
phototherapy
are
discussed.
challenges
perspectives
given
provide
inspiration
toward
future
materials.
Abstract
Electronic
switches
have
been
considered
to
be
one
of
the
most
important
components
contemporary
electronic
circuits
for
processing
and
storing
digital
information.
Fabricating
functional
devices
with
building
blocks
atomic/molecular
can
greatly
promote
minimization
meet
requirement
high
integration.
This
review
highlights
key
developments
in
fabrication
application
molecular
switching
devices.
overview
offers
valuable
insights
into
mechanisms
under
various
stimuli,
emphasizing
structural
energy
state
changes
core
molecules.
Beyond
switches,
typical
individual
metal
atomic
are
further
introduced.
A
critical
discussion
main
challenges
realizing
developing
practical
molecular/atomic
is
provided.
These
analyses
summaries
will
contribute
a
comprehensive
understanding
switch
mechanisms,
providing
guidance
rational
design
nanoswitch
toward
applications.
Abstract
Considering
the
continuous
advances
in
synthesis
and
clinical
applications
of
monoclonal
antibodies
(mAbs),
precision
therapies
that
employ
mAbs
are
essential.
In
recent
years,
extensive
efforts
have
been
invested
developing
novel
strategies
or
technologies
for
detection
mAbs.
Given
availability
advanced
biosensing
materials,
various
assemblies
multifunctional
materials
can
be
prepared
by
intelligent
design
when
evaluating
targets
This
article
provides
an
overview
functional
mAb
detection.
Subsequently,
we
present
approaches
which
receptors
combined
with
to
construct
stimulus‐responsive
analytical
platforms
evaluate
contents
activities
biological
systems,
enabling
real‐time
monitoring
diagnosis
could
facilitate
administration
during
treatment.
Furthermore,
review
examines
implications
real‐world
contexts;
it
also
discusses
ongoing
challenges
future
prospects.
Abstract
Over
the
past
decade,
4D
printing
has
revolutionized
field
of
advanced
manufacturing
by
fabricating
structures
that
dynamically
respond
to
environmental
stimuli.
During
this
process,
shape‐memory
polymers
(SMPs)
stand
out,
enabling
transformations
triggered
temperature,
light,
or
other
factors,
and
show
great
potential
for
applications
in
biomedicine
beyond.
Notably,
biodegradable
SMPs
offer
a
compelling
advantage
medical
devices
due
their
ability
adapt
within
body's
temperature
range
be
absorbed
tissues,
reducing
risks
associated
with
permanent
implants.
While
extrusion
techniques
have
laid
groundwork
biomedicine,
vat
photopolymerization
methods
like
stereolithography
digital
light
processing
are
now
at
forefront,
favored
high
resolution
flexibility
material
design.
However,
search
suitable
materials
these
continues,
current
research
focusing
on
developing
systems
meet
both
mechanical
demands
degradation
profiles
required
applications.
This
review
aims
critically
analyze
advancements
photopolymers,
particularly
elastomers,
discuss
challenges
lie
ahead
clinical
translation.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(38)
Опубликована: Июнь 21, 2024
Facile
fabrication,
low
material
complexity
and
closed-loop
recycling
are
essential
for
polymer
plastics
to
alter
their
linear
product
economy
towards
a
cradle-to-cradle
one.
Covalent
adaptable
networks
(CANs)
one
way
achieve
that,
which
intrinsically
exhibit
decent
mechanical
properties
like
the
thermosets
but
could
also
be
easily
recycled
thermoplastics.
In
this
work,
we
introduce
rigid
ester
structural
motifs
into
dynamic
poly(disulfide)s
form
series
of
dual
networks.
Owning
coherence
soft/rigid
segments
reversible
sacrificial
crosslinking,
they
tailorable
good
resistance
different
chemicals.
Their
is
achieved
via
mild
solvolysis,
maintaining
materials'
integrities.
It
offers
solution
as
sustainable
replacement
engineering
massively
under
production
hard
recycled.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 3, 2024
Covalent
adaptable
networks
(CANs),
leveraging
the
dynamic
exchange
of
covalent
bonds,
emerge
as
a
promising
material
to
address
challenge
irreversible
cross-linking
in
thermosetting
polymers.
In
this
work,
we
explore
introduction
catalyst-free
and
associative
C=C/C=N
metathesis
reaction
into
polyurethanes,
creating
CANs
with
superior
stability,
solvent
resistance,
thermal/mechanical
properties.
By
incorporating
reaction,
stress-relaxation
is
significantly
accelerated
compared
imine-bond-only
networks,
rate
adjustable
by
modifying
substituents
ortho
position
double
bonds.
The
obtained
plasticity
enables
recycle
without
altering
chemical
structure
or
mechanical
properties,
also
found
be
vital
for
achieving
shape
memory
functions
complex
spatial
structures.
This
new
crosslinker
polymer
has
potential
accelerate
ongoing
exploration
malleable
functional
thermoset
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(29)
Опубликована: Май 7, 2024
Responsive
organic
luminescent
aggregates
have
a
wide
range
of
application
fields,
but
currently
there
is
still
lack
reasonable
molecular
design
strategies.
Introducing
ion-π
interactions
into
molecules
can
effectively
alter
their
properties.
However,
current
research
typically
focuses
on
ion
localization
at
conjugated
groups
with
the
strong
interaction
forces.
In
this
work,
we
introduce
flexible
alkoxy
chain
spacers
between
fluorescent
and
sites,
then
adjust
fluorescence
performance
molecule
by
changing
strength
interactions.
Bromine
ion-based
exhibit
high
stable
quantum
yields
in
crystals
amorphous
powders
under
external
stimuli.
Hexafluorophosphate
weak
yield
very
low
powders,
showing
variable
intensities
This
demonstrates
new
class
responsive
solid-state
materials.
ACS Applied Polymer Materials,
Год журнала:
2024,
Номер
6(11), С. 6482 - 6494
Опубликована: Май 17, 2024
The
developed
smart
coating
for
water–oil
separation,
characterized
by
its
mild
separation
conditions,
ease
of
control,
and
absence
secondary
pollution,
holds
promising
potential
applications
in
controlled
liquid
transmission,
oil–water
textiles,
biosensing
films.
This
work
focused
on
synthesizing
copolymers
that
respond
to
both
photon
pH
stimuli.
Initially,
4-trifluoromethoxy-4′-methacryloxyazobenzene
(FMAB)
similar
monomers,
serving
as
photon-responsive
units
with
varying
carbon
chain
lengths,
were
synthesized
using
different
synthetic
routes.
Such
a
design
approach
also
aimed
enhance
the
hydrophobic
characteristics
photoresponsive
segments
certain
degree.
Theoretically,
impact
carbonyl
position
nucleophilic
substitution
reactions
was
investigated
through
density
functional
theory
(DFT)
calculations.
These
monomers
subsequently
copolymerized
individually
dimethylaminoethyl
methacrylate
(DMAEMA),
which
acts
pH-responsive
unit,
reversible
addition–fragmentation
transfer
(RAFT)
technique
one-step
copolymerization
process.
polymers
coated
onto
glass
slides
form
films,
contact
angles
could
be
modulated
response
light
To
highlighted,
maximum
angle
change
can
reach
131°
under
double
stimulation.
ultimately
showcase
capabilities,
polymer
combined
nonwoven
fabric
create
membrane.
membrane
is
capable
reversibly
transitioning
between
hydrophilic–lipophobic
hydrophobic–lipophilic
states,
demonstrating
substantial
future
advancements
efficient
separation.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
17(11), С. 17389 - 17397
Опубликована: Март 5, 2025
Cyclodextrins
(CDs),
a
low-polysaccharide
class,
possess
hydrophilic
outer
surface
due
to
their
hydroxyl
groups,
which
can
be
functionalized
for
various
applications.
In
this
study,
the
groups
on
β-cyclodextrin
were
with
acrylates
(CD-A)
and
subsequently
used
as
cross-linker
in
copolymerization
acrylamide
form
polyacrylamide-cyclodextrin
hydrogel
(PAC).
Compared
polyacrylamide
(PAM),
PAC
exhibited
enhanced
water
absorption
abilities
mechanical
strength.
Inspired
by
fish
scales'
structural
properties,
microporous
stainless
steel
meshes
coated
PAC,
we
could
demonstrate
an
excellent
oil-water
separation
superhydrophilicity
underwater
superoleophobicity.
The
mesh
effectively
separated
mixtures
using
gravity
filtration,
achieving
efficiencies
of
over
99%.
Repeated
use
different
oil
types
confirmed
durability
effectiveness
hydrogel-coated
practical
applications
separation.
