Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
12(34)
Published: Sept. 30, 2024
Abstract
Achieving
a
wide‐range
color‐tunable
and
dynamically
long‐afterglow
emission
in
single‐doped
system
remains
challenge.
In
this
study,
unique
host‐guest
doped
material,
TPA‐PTPQ/TPA,
exhibits
dual‐delay
at
516
605
nm,
both
with
long
lifetimes
of
up
to
108
145
ms,
which
derives
from
thermally
activated
delayed
fluorescence
(TADF)
room
temperature
phosphorescence
(RTP)
mechanisms,
respectively.
Notably,
material
demonstrates
temperature‐dependent
reversible
afterglow
characteristic,
transitioning
green,
orange,
red
substantial
spectra
shift
≈90
nm
under
different
conditions.
This
phenomenon
is
due
the
diverse
effect
on
TADF
RTP
emissions.
These
remarkable
luminescence
properties
are
successfully
applied
security
checks
anti‐counterfeiting
encryption.
study
provides
valuable
insights
into
design
dual‐delay‐emissive
luminescent
materials
based
doping
system.
Chemical Science,
Journal Year:
2024,
Volume and Issue:
15(12), P. 4364 - 4373
Published: Jan. 1, 2024
In
situ
regulation
of
π–π
coupling
was
realized
with
the
combination
rigid
intramolecular
dimer
models
and
external
stimuli,
mainly
due
to
balance
solvent–π
interactions.
The
results
establish
quantitative
relationship
between
emission
properties
distances.
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 2, 2024
Abstract
Donor–acceptor
(D–A)
structure
with
charge
transfer
(CT)
effect
is
widely
utilized
in
the
construction
of
organic
luminescent
materials.
The
adjustment
their
CT
and
related
property
usually
relies
on
changes
molecular
different
D
or
A
moieties,
which
will
lead
to
some
uncertainties
structure‐property
relationship.
With
aim
explore
clear
inherent
mechanism
for
D–A
molecule
effect,
it
ideal
that
regulation
intramolecular
one
same
can
be
realized.
Accordingly,
three
type
phosphorescence
luminogens
are
designed
synthesized.
Once
being
doped
into
polymer
matrixes,
disparate
effects
room
temperature
(RTP)
properties
achieved
a
single
molecule.
Subsequent
experiments
confirm
distributions
molecules
locally
excited
(LE)
state
mainly
responsible
distinct
RTP
behaviors,
exhibiting
well‐clarified
relationship
luminogens.
Furthermore,
transition
from
LE
even
realized
through
chemical
reaction,
leading
activated
practical
applications.
Smart Molecules,
Journal Year:
2024,
Volume and Issue:
2(3)
Published: Sept. 1, 2024
Abstract
Organic
afterglow
materials
have
drawn
increasing
attention
for
their
great
potential
in
practical
applications.
Until
now,
most
of
them
just
show
the
lifetimes
milliseconds
or
seconds,
while
realization
long
persistent
luminescence
(LPL)
lasting
minutes
even
hours
is
difficult.
In
2017,
Adachi
and
Kabe
successfully
realize
LPL
with
a
duration
longer
than
1
hour
purely
organic
system,
which
can
be
comparable
to
some
excellent
inorganic
materials.
However,
partially
unclear
structure‐property
relationship,
are
still
rather
scarce,
especially
stable
ones
air
aqueous
solution.
this
review,
we
present
recent
progress
LPL,
mainly
focusing
on
material
design
strategy
internal
mechanism.
It
anticipated
that
deep
understanding
beneficial
further
development
good
stability
phase.
The Journal of Physical Chemistry Letters,
Journal Year:
2025,
Volume and Issue:
unknown, P. 725 - 730
Published: Jan. 12, 2025
Circularly
polarized
luminescence
(CPL)
materials
have
drawn
increasing
attention
for
their
potential
applications
in
optical
displays
and
chemo/biosensing.
Nevertheless,
the
construction
of
circularly
room-temperature
phosphorescence
(CPRTP)
is
still
a
significant
challenge.
In
this
work,
four
liquid
crystalline
polymer
network
films
with
RTP
properties
been
fabricated
via
photopolymerization
cholesteric
liquid-crystalline
mixtures
containing
different
amounts
commercially
available
dyes.
The
show
yellow-green
structural
color,
enhanced
RTP,
blue
CPL,
green
CPRTP
dissymmetry
factors
up
to
-0.90,
quantum
yields
14.8%,
emission
lifetimes
607
ms.
Furthermore,
prepared
film
pattern
presents
colors
reflective,
fluorescent,
phosphorescent
modes.
This
work
not
only
provides
deep
understanding
CPRTP,
but
also
facile
strategy
fabricate
patterns
decoration
anticounterfeiting
applications.
The Journal of Physical Chemistry Letters,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1916 - 1923
Published: Feb. 17, 2025
Organic
room-temperature
phosphorescence
(RTP)
materials
have
demonstrated
great
potential
applications
in
optoelectronics,
anticounterfeiting,
and
biomedicine
fields.
Among
them,
the
RTP
properties
of
host–guest
systems
can
be
easily
regulated
by
changing
their
component
parameters,
which
has
attracted
widespread
attention.
However,
key
factor
hosts
(crystalline
or
noncovalent
interaction
network)
for
boosting
emission
at
room
temperature
was
still
unclear.
Herein,
a
triphenyl
phosphor
estradiol
system
heated
to
remove
crystal
water
then
cooled
turn
it
into
powder.
This
enabled
afterglow
brightness
improve
more
than
90-fold
phosphorescent
quantum
yield
over
700-fold.
Further
studies
indicated
that
hydrogen
bonding
interactions
estradiol's
−OH
group
were
tuned
during
these
processes,
from
with
guests
constructing
strong
network
guests.
The
triplet
excitons
thus
effectively
stabilized,
which,
coupled
suitable
T1
energy
level
host,
could
significantly
enhance
amorphous
system.
work
demonstrates
fine-tuning
inside
doped
boost
its
phosphorescence.
It
also
substantiates
is
important
crystalline
efficient
