Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 26, 2024
Abstract
Organic
room
temperature
phosphorescence
(RTP)
from
polymers
holds
significant
promise
for
information
encryption
and
anti‐counterfeiting
applications.
However,
conventional
patterning
techniques
limit
the
development
of
advanced
RTP
encryption,
highlighting
need
an
efficient
method
that
achieves
processes
quickly
conveniently.
In
this
study,
UV
laser
marking
machine
is
applied
to
create
traceless
phosphorescent
patterns
by
leveraging
photothermal
effect
water‐absorbent
quenching
property
polyacrylamide.
A
series
biaryl
derivative
phosphors
with
low
π‐electron
numbers
are
designed
absorption
below
355
nm,
thereby
preventing
polymer
sintering
(355
nm).
Additionally,
two
polymers,
PB2COOH
(phosphorescence
lifetime
τ
P
=
2.34
s;
quantum
yield
Φ
13.59%)
PBN
(
1.46
20.33%),
possessing
relatively
excellent
properties,
obtained.
The
controllable
program
non‐contact
processing
enable
rapid
realization
complex
patterns,
such
as
Twelve
Chinese
Zodiac
Signs,
effectively
overcoming
constraints
traditional
techniques.
Based
on
technology,
applications
dual‐locking
QR
(quick
response)
codes,
misleading
double
labeling,
other
methods
developed.
Advanced Optical Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 25, 2025
Abstract
Pure
organic
stimuli‐responsive
phosphorescent
materials
with
multi‐color
afterglows,
good
reversibility,
and
ease
manipulation
are
highly
appealing
for
dynamic
anti‐counterfeiting
applications,
but
remain
challenging
to
achieve.
In
this
work,
a
soft
organogel
is
rationally
designed
by
introducing
functional
carbonyl
(benzoyl
or
acetyl)
units
into
dibenzofuran
skeleton
promote
the
intersystem
crossing
(ISC),
screening
potential
organogelators
through
predicting
self‐assembly
process
aid
of
all‐atom
molecular
simulation
(AMDS).
AMDS
indicates
that
gelator
candidates
(
DBF‐Me
DBF‐Ph
)
can
self‐assemble
in
mixture
DMSO/H
2
O
balanced
π‐π
intermolecular
interactions
between
neighboring
molecules,
thus
promoting
gelation.
Notably,
fiber
gel
exhibits
yellow
afterglow
at
room
temperature
(298
K)
lifetime
235.1
ms,
which
be
switched
off
358
K
restored
after
cooling
temperature.
Furthermore,
turn
green
208
blue
77
K,
due
slight
change
conformation
packing
as
revealed
analysis
temperature‐dependent
single
crystal
structures.
This
single‐component
gel,
capable
achieving
color‐tunable
“on‐off”‐switchable
response,
offers
significant
developing
ultralong
RTP
multi‐level
features.
Advanced Optical Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 28, 2025
Abstract
In
recent
years,
organic
room‐temperature
phosphorescence
(RTP)
materials
have
garnered
significant
research
interest.
However,
the
design
and
synthesis
of
novel
polymeric
RTP
systems
continue
to
pose
substantial
challenges.
By
leveraging
cyclotriphosphazene
functionalization,
four
phosphors
are
successfully
developed.
The
presence
numerous
heteroatoms
(O,
N,
P)
within
this
structure
significantly
enhances
molecular
spin‐orbit
coupling
(SOC).
Initially,
incorporation
these
into
a
polyvinyl
alcohol
(PVA)
matrix
yielded
only
weak
emissions.
Remarkably,
thermal
annealing
transformed
long‐lived
cross‐linked
polymer
films.
Specifically,
representative
luminescent
film
(THMD@PVA)
exhibits
enhancements
in
intensity,
lifetime,
afterglow
brightness,
quantum
yield
by
factors
8,
4,
18,
6,
respectively.
With
superior
mechanical
luminescence
properties,
well‐suited
for
creating
flexible
reconfigurable
3D
objects.
Furthermore,
dual
fluorescent
phosphorescent
emissions
expands
their
applicability,
including
fingerprint
recording,
thereby
broadening
application
scope
materials.
Chemical Science,
Journal Year:
2024,
Volume and Issue:
15(13), P. 4881 - 4889
Published: Jan. 1, 2024
Simultaneously
enhancing
the
quantum
yields
and
luminescence
lifetimes
of
organic
persistent
room
temperature
phosphorescence
(RTP)
molecules
is
a
priority
in
photonic
area,
but
it
remains
formidable
challenge.
Here,
an
effective
strategy
was
proposed
to
improve
both
efficiencies
emission
decay
times
for
phosphorescent
triphenylphosphine
salts.
This
approach
involves
integrating
electron
donor
unit
into
salt
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(32), P. 42794 - 42801
Published: Aug. 1, 2024
The
development
of
pure
organic
room-temperature
phosphorescent
(RTP)
materials
greatly
facilitates
the
integrated
application
luminescent
materials.
Herein,
a
type
photoactivated
red
RTP
material
was
constructed
by
simply
doping
4-(benzo[c][1,2,5]thiadiazol-5-ylthio)benzonitrile
(p-NNS)
into
poly(methyl
methacrylate)
(PMMA)
matrix.
obtained
film
realized
controllable
photoactivation
process
regulation
diverse
solvent
levels,
demonstrating
potential
advantages
in
optical
anti-counterfeiting
applications.
Furthermore,
properties
doped
were
utilized
to
detect
oxygen
content
from
2.00%
4.90%,
which
revealed
exact
consumption
ambient
under
UV
light.
Every
CIE
point
luminescence
corresponds
certain
content,
illustrating
visualization
content.
remarkable
effect
and
this
work
will
provide
competitive
for
further
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 26, 2025
Abstract
Polymeric
room
temperature
phosphorescence
(RTP)
materials
have
been
well
developed
and
utilized
in
various
fields.
However,
their
fast
thermo‐
moisture‐quenching
behavior
highly
limit
applications
certain
harsh
environments.
Therefore,
the
preparation
of
with
moisture‐resistant
is
greatly
attractive.
Compared
common
water‐soluble
polymers,
cycloolefin
copolymers
(COC)
show
outstanding
hydrophobicity
higher
rigidity,
even
at
elevated
temperatures,
being
as
a
promising
candidate
to
prepare
suppressed
behavior.
Herein,
type
COC
bearing
hydroxyl,
ester,
adamantanyl
side
groups
synthesized.
After
dispersing
phosphors
into
this
matrix,
resultant
composites
exhibit
full‐color
RTP
lifetimes
249–590
ms.
Their
luminescence
does
not
obvious
quenching
water,
acid,
alkalinous,
reductive,
oxidative
In
presence
both
rigid
matrix
phosphors,
corresponding
composite
displays
high‐temperature
performance.
Even
378
K,
can
emit
lifetime
40–98
The
these
COC‐based
for
imaging,
information
encryption,
anti‐counterfeiting
are
thus
explored.
