Angewandte Chemie,
Год журнала:
2024,
Номер
136(38)
Опубликована: Июнь 26, 2024
Abstract
The
booming
demand
on
data
security
has
aroused
great
interest
for
developing
smart
materials
with
temporal
display
feature
and
dynamic
multicolor
fluorescence.
However,
it
remains
challenging
to
implement
both
features
most
responsive
molecules.
Herein,
we
construct
a
polymer
free
volume‐controlled
“molecular
clock
emitter”
via
covalently
embedding
multi‐stimuli
molecular
switch
(i.e.,
spiropyran)
into
network
poly(pentafluorophenyl
acrylate))
programmable
crosslink
density
volume.
By
the
aminolysis
of
pentafluorophenyl
ester
different
amount
diamine
crosslinkers,
pPFPA‐co‐SP
networks
controllable
densities
are
generated,
which
have
confinement
effects
rate
constant
SP/MC
isomerization,
thus
leading
time‐dependent
photochromism.
In
addition,
PTF1,
fluorescent
probe
that
is
sensitive
rigidity,
introduced
further
endow
system
phototunable
full‐color
emission.
Therefore,
relying
their
synergistical
responses
rigidity
network,
successfully
developed
versatile
emitter
an
“one
stone
two
birds”
manner,
shows
along
fluorescence
switching,
providing
potential
advanced
encryption
anticounterfeiting
high
level.
Chemical Society Reviews,
Год журнала:
2023,
Номер
52(23), С. 8245 - 8294
Опубликована: Янв. 1, 2023
Donor-acceptor
Stenhouse
adduct
(DASA)
photoswitches
have
gained
a
lot
of
attention
since
their
discovery
in
2014.
Their
negative
photochromism,
visible
light
absorbance,
synthetic
tunability,
and
the
large
property
changes
between
photoisomers
make
them
attractive
candidates
over
other
commonly
used
for
use
materials
with
responsive
or
adaptive
properties.
The
development
such
translation
into
advanced
technologies
continues
to
widely
impact
forefront
research,
DASAs
thus
attracted
considerable
interest
field
visible-light
molecular
switches
dynamic
materials.
Despite
this
interest,
there
been
challenges
understanding
complex
behavior
context
both
small
molecule
studies
Moreover,
incorporation
polymers
can
be
challenging
due
incompatibility
conditions
most
common
polymerization
techniques.
In
review,
therefore,
we
examine
critically
discuss
recent
developments
DASA-containing
polymers,
aiming
at
providing
better
interplay
properties
constituents
(matrix
photoswitch).
first
part
summarizes
current
DASA
design
switching
second
section
discusses
strategies
materials,
methods
studying
We
also
emerging
applications
polymeric
ranging
from
light-responsive
drug
delivery
systems,
photothermal
actuators,
sensors
photoswitchable
surfaces.
Last,
summarize
venture
on
steps
required
explore
novel
systems
expand
functional
application
opportunities
polymers.
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Ноя. 6, 2023
Abstract
Fluorescent
materials
have
attracted
widespread
attention
for
information
encryption
owing
to
their
stimuli-responsive
color-shifting.
However,
the
2D
encoding
of
fluorescent
images
poses
a
risk
leakage.
Herein,
inspired
by
mimic
octopus
capable
camouflage
changing
colors
and
shapes,
we
develop
thermadapt
shape-memory
film
(TSFF)
integrating
2D/3D
in
one
system.
The
TSFF
is
based
on
anthracene
group
with
reversible
photo-cross-linking
poly
(ethylene-co-vinyl
acetate)
network
properties.
accompanied
repeatable
fluorescence-shifting
enables
rewritable
encoding.
Meanwhile,
properties
not
only
reconfiguration
permanent
shape
creating
erasing
3D
patterns,
i.e.,
information,
but
also
facilitates
recoverable
programming
This
strategy
can
enhance
security
because
designated
inspectors
decode
providing
sequential
heating
recovery
UV
exposure.
Overall,
will
inspire
design
smart
high-security
carriers.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(26)
Опубликована: Фев. 26, 2024
Abstract
Improving
information
security
is
a
persistent
challenge
for
conventional
secrecy
approaches
such
as
single
and
double
encryption.
In
this
work,
programmable
encryption
reported,
involving
multiple
stimuli
to
independently
control
different
encrypted
information,
boost
data
security.
The
linear
‐
cyclic
isomerization
of
donor–acceptor
Stenhouse
adducts
(DASAs)
spirocyclic
merocyanine
(
SC
MC
)
spiropyrans
(SPs)
on
paper
substrate
surface
are
optimized
by
integration
ester‐contained
functional
molecules,
making
them
be
controlled
light
irradiation
heat.
By
controlling
the
sequence
three
inputs
(UV
light,
visible
heat),
hybrid
message
combining
DASAs
SPs
exhibits
distinct
outputs.
can
recorded
in
various
forms
including
characters,
text,
figures.
Because
multiplied
number
outputs,
method
offers
straightforward
powerful
solution
safeguarding
contexts,
which
enhances
clarity
effectiveness,
ensuring
resistance
tampering
counterfeiting
information.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(16)
Опубликована: Фев. 13, 2024
Abstract
Improving
the
photoswitching
rate
and
robustness
of
photochromic
molecules
in
bulk
solids
is
paramount
for
practical
applications
but
remains
an
on‐going
challenge.
Here,
we
introduce
octupolar
design
paradigm
to
develop
a
new
family
visible
light
organic
photoswitches,
namely
multi‐branched
Stenhouse
Adducts
(MOPSAs)
featuring
C
3
‐symmetrical
A
‐(D‐core)
architecture
with
dipolar
donor–acceptor
(D–A)
photochrome
each
branch.
Our
couples
multi‐dimensional
geometric
electronic
effects
MOPSAs
enable
robust
ultrafast
reversible
polymers.
Specifically,
optimal
MOPSA
(4
wt
%)
commercial
polyurethane
films
accomplishes
nearly
100
%
discoloration
6
s
under
∼
thermal‐recovery
17.4
at
60
°C,
while
acquired
kinetics
constants
are
3∼7
times
that
DASA
counterpart
1∼2
orders
magnitude
higher
than
those
reported
DASAs
Importantly,
MOPSA‐doped
polymer
sustain
500
discoloration/recovery
cycles
slow
degradation,
superior
existing
polymers
(≤30
cycles).
We
discover
multi‐dipolar
coupling
enables
enhanced
polarization
electron
delocalization,
promoting
rate‐determining
thermal
cyclization,
branched
non‐planar
geometry
induces
large
free
volume
facilitate
isomerization.
This
can
be
extended
spiropyran
or
azobenzene‐based
films.
The
performance
together
their
high‐yield
scalable
synthesis
facile
film
processing
inspires
us
explore
versatile
uses
as
smart
inks
labels
time‐temperature
indicators,
optical
logic
encryption
multi‐levelled
data
encryption.
Chem,
Год журнала:
2023,
Номер
9(7), С. 1994 - 2005
Опубликована: Июнь 6, 2023
Multifaceted
material
responses
upon
exposure
to
stimuli
are
key
for
developing
life-like
materials.
Developing
such
synthetic
systems,
though
not
trivial,
typically
relies
on
orthogonal
enable
control
of
molecular
systems
that
multi-responsive
behavior.
Access
complex
tunable
reaction
mechanisms
with
diverse
energy
landscapes
offers
an
alternative
strategy
controlling
out-of-equilibrium
processes
without
requiring
each
responsive
unit.
Donor-acceptor
Stenhouse
adducts
(DASAs)
a
class
photoswitches
have
complex,
tunable,
and
environmentally
sensitive
pathways.
We
present
the
donor-acceptor
adduct
equilibrium
photoswitching
kinetics
through
changes
in
polarity
their
environment.
Polarity
light
can
be
used
selectively
pathway
outcomes
three
DASA
derivatives
where
response
comes
from
landscape
is
driven
by
given
stimuli.
This
work
paves
way
designing
self-regulating
Advanced Materials,
Год журнала:
2023,
Номер
36(14)
Опубликована: Дек. 25, 2023
Optical
encryption
using
coloration
and
photoluminescent
(PL)
materials
can
provide
highly
secure
data
protection
with
direct
intuitive
identification
of
encrypted
information.
Encryption
capable
independently
controlling
wavelength-tunable
as
well
variable
light
intensity
PL
is
not
adequately
demonstrated
yet.
Herein,
a
rewritable
structural
color
(SC)
display
suitable
for
dual-responsive
optical
developed
stimuli-responsive
SC
block
copolymer
(BCP)
photonic
crystal
(PC)
alternating
in-plane
lamellae,
which
variety
3D
2D
perovskite
nanocrystals
preferentially
self-assembled
characteristic
PL,
presented.
The
BCP
PC
controlled
in
the
visible
range
different
precursor
doping
times.
are
luminescent,
quantum
yield
≈33.7%,
yielding
environmentally
stable
dual-mode
displays.
programmed
information
erasable
rewritable.
Dual-responsive
demonstrated,
true
Morse
code
deciphered
only
when
encoded
by
SCs
properly
combined
Numerous
combinations
realize
high
security
level
anticounterfeiting.
This
offers
novel
anti-counterfeiting.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(5), С. 6133 - 6142
Опубликована: Янв. 25, 2024
With
the
rapid
development
of
information
technology,
encrypted
storage
is
becoming
increasingly
important
for
human
life.
The
luminescent
materials
with
a
color-changed
response
under
physical
or
chemical
stimuli
are
crucial
coding
and
anticounterfeiting.
However,
traditional
fluorescent
usually
face
problems
such
as
lack
tunable
fluorescence,
insufficient
surface-adaptive
adhesion,
strict
synthesis
conditions,
hindering
their
practical
applications.
Herein,
series
lanthanide
hybrid
organogels
(Ln-MOGs)
were
rapidly
synthesized
using
simple
method
at
room
temperature
through
coordination
between
ions
2,6-pyridinedicarboxylic
acid
5-aminoisophthalic
acid.
And
multicolor
inks
also
prepared
based
on
Ln-MOG
hyaluronic
acid,
advantages
being
easy
to
write,
color-adjustable,
water-responsive
discoloration,
which
has
been
applied
paper-based
anticounterfeiting
technology.
Inspired
by
responsiveness
water,
we
designed
logic
system
that
can
realize
single-input
operations
(NOT
PASS1)
double-input
(NAND,
AND,
OR,
NOR,
XOR).
encryption
binary
code
be
actualized
utilizing
different
modes
circuit
system.
By
adjusting
energy
sensitization
luminescence
mechanism
in
gel
structure,
reading
writing
ability
verified,
great
potential
field
pattern
encryption.
Laser & Photonics Review,
Год журнала:
2024,
Номер
18(10)
Опубликована: Май 6, 2024
Abstract
Information
security
holds
paramount
importance
in
the
contemporary
information
society.
Here,
a
novel
cryptography
method
is
proposed
based
on
multi‐wavelength
complex‐amplitude
metasurface,
which
can
achieve
high
level
by
generating
frequency‐selective
key
as
an
additional
layer
of
protection.
Moreover,
quality
decrypted
holographic
images
be
significantly
improved
employing
encoding
and
modified
visual
secret
sharing
scheme,
adopts
new
superposition
operator
to
prevent
fidelity
loss.
As
proof‐of‐concept
demonstration,
prototype
metasurface
sample
designed,
fabricated,
characterized,
where
measured
results
agree
very
well
with
numerical
ones
design
goals.
The
reinforce
improve
message,
rendering
it
appealing
for
applications
communication
anti‐counterfeiting.
