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:
2025,
Номер
unknown
Опубликована: Март 10, 2025
The
design
of
synthetic
hydrogels
that
can
mimic
their
biological
counterparts
in
the
simultaneous
production
multicolor
change
and
shape
transformation
response
to
environmental
stimuli
is
great
importance
toward
intelligent
camouflage,
encryption,
actuation.
Previous
efforts
have
focused
primarily
on
developing
heterogeneous
highly
rely
respective
mechanisms
achieve
color
changes
separately,
synergistically
synchronizing
such
two
variations
into
structurally
homogenous
via
a
single
chromophore
has
been
challenging.
Here,
molecular
hydrogel
simultaneously
exhibiting
synchronized
deformation
triggered
by
stimulus
light
reported.
synchronization
mechanism
originates
from
coupled
alteration
upon
irradiation
fluorescence
emission
charge
states
spiropyran
photochromophore
covalently
incorporated
network,
thus
leading
macroscale
variation
hydrogel,
respectively.
Following
this
principle,
both
positive
negative
phototropic
are
obtained
concomitantly
with
but
flexibly
tunable
illumination
demonstrated
ingenious
application
biomimetic
actuation,
camouflage
rational
combination
these
systems.
This
work
represents
an
innovative
strategy
for
bioinspired
materials
functions
compound.
Applied Physics Letters,
Год журнала:
2025,
Номер
126(13)
Опубликована: Март 1, 2025
Inorganic
crystals
doped
with
luminescent
ions
have
attracted
considerable
interest
due
to
their
abundant
luminescence
spectra.
Particularly,
these
materials
can
show
highly
variable
in
response
external
stimuli,
rendering
widespread
applications
ranging
from
super-resolution
techniques
high-security
information
encryption.
In
this
Perspective,
we
highlight
the
recent
developments
of
controlling
optical
inorganic
under
various
including
light,
temperature,
water/humidity,
and
mechanical
force.
Moreover,
delve
into
underlying
mechanism
discuss
relevant
applications,
simultaneously
pointing
out
challenges
future
directions
for
designing
superior
stimuli-responsive
materials.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 19, 2024
Abstract
Molecular
photoswitches
can
undergo
isomerization
under
light
exposure,
making
them
uniquely
attractive
for
high
spatiotemporal
resolution
remote
control
of
biological
functions.
Visible
and
near‐infrared
(NIR)
light,
with
their
low
energy
consumption,
safety,
strong
tissue
penetration,
are
particularly
suitable
applications.
Therefore,
developing
visible‐
NIR
light‐driven
molecular
use
is
great
significance.
This
review
introduces
the
most
common
presents
state‐of‐art
applications
in
bioimaging,
biosensing,
drug
delivery,
photocontrolled
cancer
phototherapy,
photopharmacology.
The
opportunities
challenges
future
development
outlined.
Abstract
As
one
of
the
revolutionizing
biodegradable
metals,
Magnesium
(Mg)
has
gained
global
attention
from
researchers
due
to
positive
clinical
feedback
in
bone
fixation
and
cardiovascular
repair.
In
many
cases,
attributed
its
biological
effects
degradation
products
Mg,
overlooking
interactions
between
Mg
microenvironment
within
bodies,
as
well
additional
physical/chemical
reactions
induced
by
endogenous
exogenous
stimuli
on
tissues.
recent
years,
academic
community
increasingly
focused
responsiveness
Mg‐based
materials
for
tissue
repair
disease
treatment.
However,
there
is
a
lack
systematic
summaries
“composition‐structure‐function”
relationships
when
are
applied
various
physiological
scenarios.
To
address
this
gap,
review
summarizes
under
over
past
decade.
Endogenous
mainly
include
changes
spontaneously
released
2
⁺
ions
concentration,
pH
variations,
body
fluid
infiltration,
reactive
oxygen
species
intervention,
temperature
changes,
enzyme
involvement.
Exogenous
primarily
involve
external
fields
such
photo‐irradiation,
electric
field,
magnetic
ultrasound,
mechanical
stress.
By
activating
these
endogenous/exogenous
stimuli,
specific
functions
can
be
triggered
needed,
leading
more
pronounced
therapeutic
compared
non‐stimulated
state.
Accordingly,
we
also
analyze
mechanisms
underlying
enhanced
impact.
Based
existing
research,
further
examines
limitations
studies
different
stimulation
scenarios
proposes
suggestions
future
research
improvements.
Ultimately,
hope
could
provide
new
insights
efficient
application
future.
Journal of Materials Chemistry B,
Год журнала:
2024,
Номер
12(21), С. 5238 - 5247
Опубликована: Янв. 1, 2024
This
study
introduces
a
thermally
responsive
smart
hydrogel
with
enhanced
electrical
properties
achieved
through
volume
switching.
advancement
was
realized
by
incorporating
multiscale
liquid
metal
particles
(LMPs)
into
the
PNIPAM
during
polymerization,
using
their
inherent
elasticity
and
conductivity
when
deswelled.
Unlike
traditional
conductive
additives,
LMPs
endow
remarkably
consistent
switching
ratio,
significantly
enhancing
is
attributed
to
minimal
nucleation
effect
of
polymerization
liquid-like
behavior,
like
vacancies
in
polymeric
under
compression.
The
PNIPAM/LMP
exhibits
highest
switching,
an
unprecedented
switch
6.1
orders
magnitude.
Even
after
repeated
swelling/deswelling
cycles
that
merge
some
increase
swelled,
consistently
maintains
exceeding
4.5
magnitude,
which
still
record
date.
Comprehensive
measurements
reveal
possesses
robust
mechanical
properties,
tissue-like
compression
modulus,
biocompatibility,
self-healing
capabilities.
These
features
make
ideal
candidate
for
long-term
implantable
bioelectronics,
offering
solution
mismatch
dynamic
human
tissues.
Chemical Communications,
Год журнала:
2024,
Номер
60(75), С. 10342 - 10345
Опубликована: Янв. 1, 2024
A
non-equilibrium
cucurbit[7]uril-mediated
supramolecular
host-guest
system
is
fabricated
by
using
urea/urease
to
control
aqueous
solution
pH
on
time
dimension,
showing
transient
assembly
behavior
and
time-dependent
fluorescence.
The
dynamic
can
be
also
achieved
in
hydrogel
network,
resulting
a
fluorescent
for
information
encryption.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 22, 2024
With
growing
threats
from
counterfeiting-based
security
breaches,
multi-level
and
specific
stimuli-responsive
anti-counterfeiting
devices
message
encryption
methods
have
attracted
immense
research
interest.
Fluorescence-based
aggregation-induced
emission
(AIE)-based
materials
solves
the
problems
to
a
considerable
extent.
However,
development
of
smarter
patterns
with
hierarchical
levels
alongside
dynamic
display
is
still
challenging.
To
screen
out
this
complication,
we
bring
forward
pH-switchable
fluorescent
assembly
an
AIEgen
aliphatic
acid.
We
later
temporally
direct
molecular
aid
chemical
trigger-regulated
pH
clock,
generating
transitory
multicolor
emission,
including
transient
white
light
generation.
The
pH-dependent
emissions
were
further
implemented
in
constructing
smart
multi-input
AND
gates.
Subsequently,
integrate
time-gated
emissive
system
develop
advanced
multi-dimensionally
secure
data
strategy.
This
novel
approach
enhances
measures
by
introducing
additional
layer
based
on
temporal
characteristics.
Angewandte Chemie,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 22, 2024
Abstract
With
growing
threats
from
counterfeiting‐based
security
breaches,
multi‐level
and
specific
stimuli‐responsive
anti‐counterfeiting
devices
message
encryption
methods
have
attracted
immense
research
interest.
Fluorescence‐based
aggregation‐induced
emission
(AIE)‐based
materials
solves
the
problems
to
a
considerable
extent.
However,
development
of
smarter
patterns
with
hierarchical
levels
alongside
dynamic
display
is
still
challenging.
To
screen
out
this
complication,
we
bring
forward
pH‐switchable
fluorescent
assembly
an
AIEgen
aliphatic
acid.
We
later
temporally
direct
molecular
aid
chemical
trigger‐regulated
pH
clock,
generating
transitory
multicolor
emission,
including
transient
white
light
generation.
The
pH‐dependent
emissions
were
further
implemented
in
constructing
smart
multi‐input
AND
gates.
Subsequently,
integrate
time‐gated
emissive
system
develop
advanced
multi‐dimensionally
secure
data
strategy.
This
novel
approach
enhances
measures
by
introducing
additional
layer
based
on
temporal
characteristics.
Angewandte Chemie,
Год журнала:
2024,
Номер
136(38)
Опубликована: Июнь 21, 2024
Abstract
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.
