Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 15, 2024
Abstract
Materials
with
room‐temperature
phosphorescence
(RTP)
from
deep
red
to
near‐infrared
(NIR)
region
exhibit
great
potential
for
emerging
applications.
However,
such
molecules
typically
require
a
low‐lying
first
triplet
(T
1
)
excited
state,
which
may
not
be
optimal
exciton
stabilization,
potentially
compromising
the
lifetime.
This
study
reports
design
of
four
9
H
‐carbazole
(Cz)
analogs
extended
conjugation
lengths
used
as
dopants
achieve
RTP
emissions
in
and
NIR
regions
lifetimes
exceeding
700
ms.
These
findings
reveal
that
substituting
reactive
hydrogen
atoms
Cz
methyl
groups
significantly
enhances
photoluminescence
quantum
yield
(PLQY)
these
materials
compared
their
non‐methylated
counterparts.
Additionally,
doping
systems
can
activated
by
visible
light,
achieving
persistent
even
under
excitation
450
nm
light.
Theoretical
calculations
demonstrate
crucial
roles
charge
transfer
state
enhanced
spin‐orbital
coupling
(SOC)
matrix
elements
upon
long‐lifetime
beyond
600
nm.
research
presents
strategy
employing
Cz‐based
facilitate
extending
regions.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(32)
Published: June 24, 2024
Abstract
Ultralong
room‐temperature
phosphorescent
(URTP)
materials
have
attracted
wide
attention
in
anti‐counterfeiting,
optoelectronic
display,
and
bio‐imaging
due
to
their
special
optical
properties.
However,
blue
are
very
scarce
during
applications
because
of
the
need
simultaneously
populate
stabilize
high‐energy
excited
states.
In
this
work,
a
stepwise
stiffening
chromophore
strategy
is
proposed
suppress
non‐radiative
jump
by
continuously
reducing
internal
spin
chromophore,
successfully
developing
series
materials.
Phosphorescence
lifetimes
more
than
3
s
achieved,
with
longest
lifetime
reaching
5.44
lasting
70
naked
eye.
As
far
as
know,
best
result
that
has
been
reported.
By
adjusting
conjugation,
multicolor
phosphorescences
from
cyan
green
realized.
addition,
these
chromophores
exhibit
same
excellent
properties
urea
polyvinyl
alcohmance
(PVA).
Finally,
applied
luminescent
displays.
Journal of Materials Chemistry C,
Journal Year:
2024,
Volume and Issue:
12(26), P. 9578 - 9585
Published: Jan. 1, 2024
Near-infrared
circularly
polarized
organic
room
temperature
phosphorescence
is
achieved
by
doping
a
naphthalimide
derivative
guest
into
tartaric
acid
host.
Chemistry - An Asian Journal,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 23, 2025
Abstract
To
date,
organic
room‐temperature
phosphorescent
(RTP)
materials
have
received
much
attention
due
to
their
long
lifetime
and
large
Stokes
shift,
been
widely
used
in
anti‐counterfeiting
encryption,
bio‐imaging,
sensing
monitoring.
Researchers
a
variety
of
approaches
construct
ultra‐long,
efficient
RTP
materials,
with
the
confinement
chromophores
polymers
being
favored
improve
performance.
The
polymer
entanglement
structure
restricts
vibration
rotation
chromophore,
which
successfully
suppresses
non‐radiative
excitation
triplet
exciton
protects
from
external
environment
(oxygen,
water),
is
conducive
realization
ultra‐long
bright
emission,
makes
material
easy
process,
broadens
application
range
material.
This
review
summarizes
recent
advances
study
polymeric
underlying
mechanisms
design
strategies,
discusses
properties
amorphous
crystalline
respectively,
as
well
latest
applications
polymers,
finally
challenges
for
development
outlook
future.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 23, 2024
Abstract
Double
phosphorescence
components
from
a
single
organic
molecule
is
rarely
reported
before
because
most
molecules
must
follow
Kasha's
rule
and
merely
emit
T
1
state.
We
discover
unique
phenomenon
of
conformation‐controlled
expression
double
components.
The
green
component
the
red
are
assigned
to
dinaphthylamine
moiety
pyrene
unit
N,N‐di(naphthalen‐2‐yl)pyren‐1‐amine
(NaPy),
respectively.
NaPy
shows
time‐dependent
excitation‐dependent
afterglow
color
change
in
copolymerized
MMA
film
at
room
temperature
due
simultaneous
However,
PMMA
MA
film,
just
expresses
component,
suggesting
that
matrix
rigidity
greatly
affects
via
altering
conformation
NaPy.
In
low‐rigidity
matrix,
dyanmic
free
rotation
triplet
excitons
relax
T1
state
inner
conversion
or
vibration
relaxation,
leading
sole
component.
high‐rigidity
highly
twisted
stabilized
limitation
2
return
S0
separately,
resulting
Thus,
follows
but
disobeys
matrix.
can
function
relatively
independently,
wide‐range
change.
Journal of Materials Chemistry C,
Journal Year:
2024,
Volume and Issue:
12(13), P. 4835 - 4841
Published: Jan. 1, 2024
Organic
luminogens
with
through-space
charge
transfer
(TSCT)
were
obtained
through
connecting
donor
and
acceptor
non-conjugated
alkyl
chains.
The
intensity
of
TSCT
could
be
mapped
by
the
corresponding
room
temperature
phosphorescence
(RTP)
effect.
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 6, 2024
Abstract
The
maintenance
of
triplet
excitons
to
produce
room‐temperature
phosphorescence
while
simultaneously
improving
the
luminescence
dissymmetry
factor
(g
lum
)
and
photoluminescence
quantum
yield
(PLQY)
makes
preparation
circularly
polarized
(CP‐RTP)
materials
challenging.
Herein,
two
chiral
cocrystals
are
reported
with
CP‐RTP
using
S/R‐1‐(1‐Naphthyl)ethanol
(S/R‐1‐nea)
as
donor
1,2,4,5‐Tetracyanobenzene
(TCNB)
acceptor.
Simultaneous
enhancement
g
PLQY
is
accomplished,
greatest
in
≈31%
|g
|
0.065,
which
one
highest
cocrystals.
Doping
into
polyvinyl
alcohol
(PVA)
matrix
resulted
polymer
films
long
afterglow
luminescence,
indicating
potential
for
multilevel
encryption
applications.
This
study
provides
a
novel
approach
achieve
dual
improvement
PLQY,
broadens
application
prospects
materials.
ChemPhysChem,
Journal Year:
2024,
Volume and Issue:
25(23)
Published: Aug. 15, 2024
Abstract
The
long‐emission‐lifetime
nature
of
room‐temperature
phosphorescence
(RTP)
materials
lays
the
foundation
their
applications
in
diverse
areas.
Despite
advantage
mechanical
property,
processability
and
solvent
dispersity,
emission
lifetimes
polymer‐based
remain
not
particularly
long
because
labile
organic
triplet
excited
states
under
ambient
conditions.
Specifically,
lifetime
(
τ
P
)
longer
than
2
s
even
4
have
rarely
been
reported
polymer
systems.
Here,
luminescent
compounds
with
small
rate
on
order
approximately
10
−1
are
designed,
ethylene‐vinyl
alcohol
copolymer
(EVOH)
as
matrix
antioxidant
1010
to
protect
triplets
employed,
ultralong
up
4.6
conditions
by
short‐term
low‐power
excitation
achieved.
resultant
exhibit
high
afterglow
brightness,
duration,
excellent
into
large
area
thin
films,
transparency
thermal
stability,
which
display
promising
anticounterfeiting
data
encryption
functions.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(43), P. 59004 - 59014
Published: Oct. 16, 2024
Herein,
we
successfully
observe
the
site
effect
of
electron
acceptors
on
ultralong
organic
room-temperature
phosphorescence
(UORTP)
in
case
7H-benzo[c]carbazole
(BCz)
derivatives:
cyanophenyl
nitrogen
can
promote
intersystem
crossing
(ISC)
efficiency
and
enhance
intensity
by
facilitating
n–π*
transitions
but
make
a
slight
change
to
wavelength;
naphthalene
cause
remarkable
red
shift
wavelength
reducing
T1
energy
level
BCz
derivatives
also
promoting
ISC
weaken
lowering
molecular
symmetry.
Three
(1-BCzPhCN,
2-BCzPhCN,
3-BCzPhCN)
with
acceptor
at
different
sites
(nitrogen
site)
were
synthesized
through
combination
nucleophilic
substitution
reaction
Suzuki
coupling
reaction.
The
properties
1-BCzPhCN,
3-BCzPhCN
toluene
solution,
copolymerized
MMA
film,
PVA
film
measured
analyzed.
1-BCzPhCN
emits
intrinsic
green
∼500,
∼536,
∼580
nm,
while
2-BCzPhCN
give
out
yellow
27
40
showing
that
leads
wavelength,
makes
difference
wavelength.
Under
same
condition,
is
usually
ranked
as
1-BCzPhCN/3-BCzPhCN
>
demonstrating
promotes
enhances
intensity,
reduces
symmetry
accelerates
nonradiative
dissipation.
Time-dependent
density
functional
theory
calculations
verify
shifts
level,
facilitates
strengthen
intensity.
Moreover,
three
doped
into
DMAP
BBP,
separately.
exhibited
colors
due
interactions
host
materials.
We
believe
this
work
will
an
insight
structure–property
relationship
molecules
pave
way
for
design
colorful
UORTP
