Advanced Optical Materials,
Год журнала:
2024,
Номер
12(20)
Опубликована: Апрель 11, 2024
Abstract
Long‐lived
organic
luminescence
materials
with
color‐tunable
afterglow
have
attracted
considerable
attention
due
to
potential
applications
in
display
and
information
encryption.
Nevertheless,
the
majority
of
these
currently
limited
capability
for
regulating
color
only
one
direction.
Here,
a
metal‐organic
coordination
polymer
(Zn‐PTZ‐O)
is
presented
that
demonstrates
ability
modulate
its
circular
modulation
pathway.
As
temperature
increases
from
77
400
K,
red‐shifts
blue
green,
then
blue‐shifts
back
blue,
achieving
modulation.
This
outstanding
phenomenon
attributed
concurrence
long‐lived
thermally
activated
delayed
fluorescence
phosphorescence
emission
Zn‐PTZ‐O.
Furthermore,
Zn‐PTZ‐O
also
has
forward
reverse
excitation
wavelength
dependence
at
K
room
temperature,
respectively.
340
460
nm
yellow.
While
as
375
410
yellowish‐green
almost
forming
another
color‐changing
circle.
work
provides
good
idea
design
materials.
Advanced Materials,
Год журнала:
2024,
Номер
36(27)
Опубликована: Апрель 23, 2024
Abstract
The
development
of
single‐system
materials
that
exhibit
both
multicolor
room‐temperature
phosphorescence
(RTP)
and
thermally
activated
delayed
fluorescence
(TADF)
with
tunable
after
glow
colors
channels
is
challenging.
In
this
study,
four
metal‐free
carbon
dots
(CDs)
are
developed
through
structural
tailoring,
panchromatic
high‐brightness
RTP
achieved
via
strong
chemical
encapsulation
in
urea.
maximum
lifetime
quantum
yield
reaches
2141
ms
56.55%,
respectively.
Moreover,
CDs‐IV@urea,
prepared
coreshell
interaction
engineering,
exhibits
a
dual
afterglow
red
green
TADF.
degree
conjugation
functional
groups
precursors
affects
the
binding
interactions
nitrogen
cladding
on
CDs,
which
turn
stabilizes
triplet
energy
levels
gap
between
S
1
T
(Δ
E
ST
)
to
induce
RTP.
enhanced
wrapping
lowers
Δ
,
promoting
reverse
intersystem
crossing,
leads
This
fully
state,
thus
stabilizing
material
water,
even
extreme
environments
such
as
acids
oxidants.
These
tested
multicolor,
time,
temperature
multiencryption
well
vivo
bioimaging.
Hence,
these
have
promising
practical
applications
information
security
biomedical
diagnosis
treatment.
Materials Chemistry Frontiers,
Год журнала:
2024,
Номер
8(7), С. 1731 - 1766
Опубликована: Янв. 1, 2024
This
work
describes
recent
developments
in
near-infrared
(NIR)
organic
light-emitting
diode
(OLED)
emitters.
We
discuss
applications
of
NIR
OLEDs
as
well
various
groups
highly
luminescent
materials
used
the
OLED
emissive
layer.
Journal of Materials Chemistry C,
Год журнала:
2024,
Номер
12(8), С. 2662 - 2698
Опубликована: Янв. 1, 2024
Theoretical
and
experimental
approaches
for
the
development
of
organic
room
temperature
phosphorescence
compounds
exhibiting
blue,
green,
red,
white
emissions
many
potential
applications
are
analysed
classified.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(25)
Опубликована: Фев. 4, 2024
Abstract
Supramolecular
organic
framework
(SOF)
has
recently
garnered
significant
research
interest
in
the
field
of
luminescent
materials.
However,
SOF
with
room‐temperature
phosphorescence
emission
solution
is
very
rare
due
to
quenching
dissolved
oxygen
and
free
molecular
motions,
which
would
lead
nonradiative
deactivation
triplet
exciton
liquid
state.
In
this
work,
a
3D
cationic
phosphorescent
synthesized
through
host‐guest
interaction
between
CB[8]
tetrahedral
monomer
TBBP,
can
rapidly
adsorb
anionic
guests
solution.
When
dyes
are
introduced,
singlet
Förster
resonance
energy
transfer
(TS‐FRET)
be
achieved,
delayed
fluorescence
large
Stokes
shift
realized.
Additionally,
when
drugs
TBBP‐CB[8]
quenched
charge
transfer,
enabling
detection
signals.
Taking
advantage
fast
adsorption
property
SOF,
an
INHIBIT
logic
gate
three
inputs
two
outputs
constructed.
These
findings
provide
novel
method
prepare
functional
materials
new
pathway
construct
TS‐FRET
system
Abstract
Avoiding
the
tedious
process
of
crystal
cultivation
and
directly
obtaining
organic
crystals
with
desirable
phosphorescent
performance
is
great
significance
for
studying
their
structure
properties.
Herein,
a
set
benzophenone‐cored
phosphors
bright
green
afterglow
are
obtained
on
large
scale
through
in‐situ
generation
via
an
end‐capping
strategy
to
suppress
non‐radiative
triplet
excitons
reinforce
intermolecular
interactions.
The
ordered
arrangement
alkyl‐cyano
groups
as
regulators
crucial
enhancement
room‐temperature
phosphorescence
(RTP)
emission,
which
has
been
further
verified
by
attenuated
lifetimes
in
isolated
states
formation
inclusion
complexes
upon
binding
pillar[5]arenes.
Moreover,
hierarchical
interactions
phosphors,
including
hydrogen
bonding,
π‐π
stacking
interactions,
van
der
Waals
forces,
quantified
structures
theoretical
calculation
deeply
interpret
origins
RTP
emission.
With
this
study,
we
provide
potential
direct
acquisition
crystalline
modulation
RTP.
Advanced Materials,
Год журнала:
2024,
Номер
36(31)
Опубликована: Апрель 18, 2024
Shaping
room
temperature
phosphorescence
(RTP)
materials
into
3D
bodies
is
important
for
stereoscopic
optoelectronic
displays
but
remains
challenging
due
to
their
poor
processability
and
mechanical
properties.
Here,
konjac
glucomannan
(KGM)
employed
anchor
arylboronic
acids
with
various
π
conjugations
via
a
facile
B─O
covalent
reaction
afford
printable
inks,
using
which
full-color
high-fidelity
RTP
objects
high
strength
can
be
obtained
direct
ink
writing-based
printing
freeze-drying.
The
doubly
rigid
structure
supplied
by
the
synergy
of
hydrogen
bonding
protect
triplet
excitons;
thus,
prepared
object
shows
striking
lifetime
2.14
s.
printed
counterparts
are
successfully
used
anti-counterfeiting
recycled
reprinted
nondestructively
dissolving
in
water.
This
success
expands
scope
luminescent
materials,
providing
an
eco-friendly
platform
additive
manufacturing
sophisticated
architectures.
Abstract
“Molecular
science”
has
long
been
regarded
as
the
golden
rule
to
guide
design
of
organic
materials’
performances
in
past
many
years,
but
some
interesting
phenomena
conventional
aggregation‐caused
fluorescence
quenching
and
new
aggregation‐induced
emission
reflect
that
properties
would
be
changed
from
“molecule”
“aggregate”.
Therefore,
“molecular
theory
faces
certain
limitations
regulating
performance
materials
at
aggregation.
In
this
work,
it
is
discovered
photosensitizer's
contain
reactive
oxygen
species,
which
could
affected
by
changing
molecular
atoms
aggregation
form.
The
introduction
selenium
redshift
improve
species
(ROS)
efficiency.
addition
atomic
effect,
ROS
efficiency
photosensitizers
after
coating
a
polymeric
shell,
is,
production
type
II
singlet
(
1
O
2
)
suppressed,
while
I
superoxide
anion
(O
−•
improved.
This
work
discovers
are
relevant
effect
discussing
deeply
influence
mechanism,
important
research
significance
for
modulating
precisely
promoting
development
photodynamic
therapy.
JACS Au,
Год журнала:
2025,
Номер
5(2), С. 756 - 765
Опубликована: Янв. 23, 2025
Carbazolocarbazole
(CCz)
represents
a
novel
class
of
heterocycles
in
the
carbazole
family,
distinguished
by
its
unique
structure
and
related
properties.
However,
significant
challenges
associated
with
synthesis
have
constrained
exploration
studies
recent
years.
Herein,
we
presented
thorough
reproducible
method
for
synthesizing
gram-sized
helical
CCz,
extending
functionalization
to
investigate
both
pristine
CCz
six
derivatives
various
substituents.
This
work
is
debut
compounds
displaying
afterglow
characteristics
solid
state.
The
demonstrated
impressive
ultralong
room-temperature
phosphorescence
(URTP)
lifetimes,
ranging
from
0.52
0.72
s,
which
are
considered
relatively
long
among
family.
URTP
series
occurs
due
efficient
intersystem
crossing
(ISC)
process
singlet
triplet-excited
states,
facilitated
enhanced
spin–orbit
coupling
(SOC).
Based
on
comprehensive
investigation
seven
compounds,
proposed
strategy
elevating
photoluminescence
quantum
yield
(PLQY)
organic
emitters.
Notably,
most
rigid
derivatives,
SpiroCCz,
exhibited
highest
total
PLQY
79.9%,
one
carbazole-based
emitters
polymer
matrix.
Overall,
innovative
promising
candidates
applications
optoelectronic
devices,
bioimaging,
security
printing.
