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.
Materials Chemistry Frontiers,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Organic
room-temperature
phosphorescence
can
be
facilitated
according
to
rational
design
principles
that
promote
intersystem
crossing
and
decrease
non-radiative
decay
in
aggregated
states,
demonstrating
versatile
applications
across
multiple
fields.
Abstract
Conformational
flexibility
is
essential
to
the
stimuli-responsive
property
of
organic
materials,
but
achieving
reversible
molecular
transformation
still
challenging
in
functional
materials
for
high
energy
barriers
and
restriction
by
intermolecular
interactions.
Herein,
through
incorporation
various
steric
hindrances
into
phenothiazine
derivatives
with
different
positions
quantities
tune
conformations
adjustable
repulsive
forces,
folded
angles
gradually
changed
from
180°
90°
17
compounds.
When
angle
located
at
112°
moderated
effect,
dynamic
under
mechanical
force
has
been
achieved
low
mutually
regulated
motions,
resulting
both
self-recoverable
phosphorescence
properties
first
time.
It
opened
up
a
new
way
realize
self-recovery
which
can
facilitate
multi-functional
smart
avenue
other
fields
inspiration.
Science Advances,
Journal Year:
2025,
Volume and Issue:
11(12)
Published: March 21, 2025
Multiresonance
thermally
activated
delayed
fluorescence
(MR-TADF)
emitters
are
promising
candidates
for
organic
light-emitting
diodes
(OLEDs)
with
high
color
quality.
However,
in
most
cases,
noble
metal–containing
phosphors
required
as
sensitizers
MR-TADF
to
improve
their
electroluminescence
(EL)
performances,
which
may
lead
cost
and
environmental
pollution.
Herein,
an
efficient
purely
room-temperature
phosphorescence
(RTP)
material,
3,2-PIC-TXT,
fast
radiation
is
developed.
It
not
only
exhibits
impressive
EL
performances
emitter
outstanding
external
quantum
efficiency
(EQE)
of
33.2%,
higher
than
that
Ir(ppy)
3
(25.2%),
but
also
functions
remarkably
a
sensitizer
green
(BN2,
tCzphB-Ph,
tCzphB-Fl).
The
hyperfluorescence
OLEDs
using
3,2-PIC-TXT
provide
ultrahigh
EQEs
40.9
43.8%,
superior
those
based
on
(37.0
38.0%),
along
superb
purity
excellent
operational
stability.
These
the
best
devices
RTP
materials
reported
so
far.
Journal of Materials Chemistry C,
Journal Year:
2024,
Volume and Issue:
12(31), P. 12045 - 12053
Published: Jan. 1, 2024
Thianthrene
derivatives
demonstrate
reversible
photochromism
and
photoinduced
RTP,
with
TN-2Nap
showing
significant
thermal
control
due
to
low
reorganization
energy
π-conjugation.
ACS Materials Letters,
Journal Year:
2024,
Volume and Issue:
6(9), P. 3941 - 3950
Published: July 26, 2024
It
is
still
unclear
how
weak
interactions
specifically
affect
electronic
structures.
Here,
we
systematically
reduce
the
number
of
N–H
bonds
within
diarylmethane
(DAM),
precisely
diminishing
hydrogen
(H-bonds).
Contrary
to
widely
reported
result
that
H-bonds
could
enhance
molecular
brightness
by
promoting
electron
delocalization,
DAMs
lacking
exhibit
superior
luminescence,
compared
with
in
both
dilute
solutions
and
solid
states.
indicated
tend
induce
n-electron
localization,
preventing
formation
through-space
lone-pair
conjugation
(n–n
TSC).
In
addition,
unlike
studied
π–π
only
existed
aggregate
state,
n–n
TSC
can
even
stabilize
conformation
expressed
solutions.
Herein,
not
achieve
bright
white-light
emissions
nonconjugated
small
molecules
but
also
reveal
surprisingly
competitive
relationship
between
providing
a
new
strategy
for
designing
excellent
optoelectronic
materials
via
bridge.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 26, 2025
Achieving
organic
red/near
infrared
(NIR)
phosphorescence
at
high
temperatures
is
theoretically
challenging
because
of
the
severe
nonradiative
transitions
excited
triplet
states
with
low
energy
gaps.
This
study
realizes
bright
and
persistent
red/NIR
afterglow
excellent
high-temperature
resistance
up
to
413
K
via
highly
efficient
(≈100%)
resonance
transfer
(PRET)
from
rationally
designed
branched
luminogens
as
donors
dyes
acceptors,
coupled
optimized
aggregated
structures.
According
systematic
investigations,
abundant
internal
cavities
formed
by
in
solid
ensure
dye
loading
space
limitation,
which
can
considerably
suppress
temperatures,
promoting
a
stability.
Moreover,
16
types
host-guest
systems
varied
topological
structures
different
various
sizes
confirm
universality
strategy.
provides
an
approach
achieve
stable
afterglow.
