Hydrogen Bond‐Associated Photofluorochromism for Time‐Resolved Information Encryption and Anti‐counterfeiting
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 23, 2024
Abstract
Time‐resolved
photofluorochromism
constitutes
a
powerful
approach
to
enhance
information
encryption
security
but
remains
challenging.
Herein,
we
report
strategy
of
using
hydrogen
bonds
regulate
the
time
for
initiating
photofluorochromism.
In
our
strategy,
copolymers
containing
negative
photochromic
spiropyran
(NSP),
naphthalimide,
and
multiple
hydrogen‐bonding
(UPy)
units
are
designed,
which
display
photo‐switchable
fluorescence
resonance
energy
transfer
(FRET)
process
from
naphthalimide
donor
NSP
acceptor.
Interestingly,
FRET
is
locked
via
dynamic
interaction
between
ring‐opened
UPy
moieties,
resulting
in
time‐dependent
fluorescence.
The
change
can
be
finely
regulated
fraction
polymers.
Besides
novel
fluorescence,
polymers
also
take
advantage
visible‐light
triggerable,
excellent
photostability,
photoreversibility,
processability.
We
demonstrate
that
these
properties
enable
them
many
application
opportunities
such
as
fluorescent
labels
multilevel
patterns.
Язык: Английский
4D Assembly of Time‐dependent Lanthanide Supramolecular Multicolor Phosphorescence for Encryption and Visual Sensing
Yun‐Ga Wu,
Wei‐Lei Zhou,
Yu Qiu
и другие.
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 14, 2025
Abstract
Supramolecular
dynamic
room
temperature
phosphorescence
(RTP)
is
the
focus
of
current
research
because
its
wide
application
in
biological
imaging
and
information
anti‐counterfeiting.
Herein,
a
time‐dependent
supramolecular
lanthanide
phosphorescent
4D
assembly
material
with
multicolor
luminescence
including
white,
which
composed
4‐(4‐bromophenyl)‐pyridine
salt
derivative
(G),
inorganic
clay
(LP)/Eu
complex
pyridine
dicarboxylic
acid
(DPA)
reported.
Compared
self‐assembled
nanoparticle
G,
lamellar
G/LP
showed
double
emission
fluorescence
at
380
nm
516
over
time.
Within
60
min,
lifetime
quantum
yield
increases
from
none
to
7.4
ms
27.53%
respectively,
achieving
emission,
due
limitation
progressive
stacking
LP
electrostatically
driven
“domino
effect.”
Furthermore,
DPA
G/LP/Eu
leads
time‐resolved
colorless
purple
successfully
applied
multi‐level
logic
anti‐counterfeiting
efficiently
antibiotic
selective
sensor.
Язык: Английский
Non‐volatile and Secure Optical Storage Medium with Multilevel Information Encryption
Advanced Science,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 16, 2024
Abstract
Non‐volatile
photomemory
based
on
photomodulated
luminescent
materials
offers
unique
advantages
over
voltage‐driven
memory,
including
low
residual
crosstalk
and
high
storage
speed.
However,
conventional
have
thus
far
been
volatile
insecure
for
data
because
of
trap
depth
single‐level
channels.
Therefore,
the
development
a
novel
non‐volatile
multilevel
medium
encryption
remains
challenge.
Herein,
robust,
non‐volatile,
optical
is
reported,
Ba
3
MgSi
2
O
8
:Eu
3+
,
which
combined
merits
light‐induced
valence
(Eu
→
Eu
2+
)
photochromic
phenomena
using
stimulation
effects,
accompanied
by
larger
color
contrasts
(>90%).
These
two
features
provided
dual‐level
channels
in
single
host,
significantly
improving
security.
Notably,
signals
could
be
written
erased
simultaneously
alternating
265
365
nm
light
stimuli.
Theoretical
calculations
indicated
that
robust
centers
induced
intrinsic
interstitial
Mg
vacancy
defects
with
suitable
depths
enable
excellent
reversibility
long‐term
capability.
By
relying
different
readout
mechanisms,
encrypted
information
can
accurately
decrypted
separately
probing
signals,
ensuring
This
study
proposes
approach
constructing
Язык: Английский
Pyridine‐Based Rigidochromic Fluorescent Security Ink
Chinese Journal of Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 21, 2025
Comprehensive
Summary
Traditional
fluorescent
probes
typically
display
blueshifted
emission
in
rigidifying
media;
however,
a
newly
developed
class
of
rigidochromic
fluorophores
derived
from
phenanthridine
demonstrates
remarkable
redshifted
under
similar
conditions.
Pyridine,
with
N‐heterostructure
to
those
group,
is
considered
promising
candidate
for
achieving
comparable
rigidity‐induced
redshift
behavior.
In
this
work,
we
synthesized
eight
organic
featuring
diverse
functional
units
and
substitutes
by
systematically
combining
pyridine
carbazole,
triazatruxene
(TAT),
tetraphenylethylene
(TPE),
respectively.
These
molecules
exhibit
significant
redshifts
(up
225
nm,
record
high
value
ever
reported)
or
notable
intensity
changes
as
the
rigidity
polymer
matrix
increases,
along
unique
acid
responsiveness.
The
differences
polar‐π
interactions
between
polymers
diversify
behavior,
advancing
development
secure
printing
intelligent
optical
materials.
By
embedding
these
into
films
helical
phase
structures,
tunable
chirality
was
achieved.
Notably,
leveraging
acid‐responsive
properties
fluorophores,
time‐dependent
light‐controlled
dynamic
encryption
system
constructed,
successfully
enabling
multi‐level
information
encryption.
This
research
greatly
expands
scope
their
applications
anti‐counterfeiting
storage.
Язык: Английский
Algorithm in chemistry: molecular logic gate-based data protection
Chemical Society Reviews,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
This
review
focuses
on
stimuli-responsive
material
(SRM)-based
data
protection,
emphasizing
the
integration
of
intricate
logic
and
algorithms
in
SRM-constructed
hardware.
It
also
discusses
current
challenges
future
directions
field.
Язык: Английский
Hydrogen Bond‐Associated Photofluorochromism for Time‐Resolved Information Encryption and Anti‐counterfeiting
Angewandte Chemie,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 23, 2024
Abstract
Time‐resolved
photofluorochromism
constitutes
a
powerful
approach
to
enhance
information
encryption
security
but
remains
challenging.
Herein,
we
report
strategy
of
using
hydrogen
bonds
regulate
the
time
for
initiating
photofluorochromism.
In
our
strategy,
copolymers
containing
negative
photochromic
spiropyran
(NSP),
naphthalimide,
and
multiple
hydrogen‐bonding
(UPy)
units
are
designed,
which
display
photo‐switchable
fluorescence
resonance
energy
transfer
(FRET)
process
from
naphthalimide
donor
NSP
acceptor.
Interestingly,
FRET
is
locked
via
dynamic
interaction
between
ring‐opened
UPy
moieties,
resulting
in
time‐dependent
fluorescence.
The
change
can
be
finely
regulated
fraction
polymers.
Besides
novel
fluorescence,
polymers
also
take
advantage
visible‐light
triggerable,
excellent
photostability,
photoreversibility,
processability.
We
demonstrate
that
these
properties
enable
them
many
application
opportunities
such
as
fluorescent
labels
multilevel
patterns.
Язык: Английский