The Journal of Physical Chemistry C,
Год журнала:
2024,
Номер
128(46), С. 19893 - 19900
Опубликована: Ноя. 7, 2024
Pure
organic
ultralong
room
temperature
phosphorescent
(URTP)
materials
have
garnered
significant
attention
for
applications
in
luminescent
materials,
biosensing,
and
information
encryption.
These
offer
advantages
over
heavy
metal
such
as
lower
cost,
reduced
biological
toxicity,
minimal
environmental
impact.
Herein,
the
first
time,
we
demonstrate
a
series
of
RTP
based
on
spiro[fluorene-9,9′-xanthene]
(SFX)
hole-transporting
molecules,
specifically
X59
X55.
Our
research
presents
that
incorporating
more
rigid
SFX
units
significantly
extends
lifetime
enhances
photoluminescence
quantum
yield
(PLQY).
The
large
steric
hindrance
structures
suppresses
nonradiative
molecular
motions,
thereby
prolonging
phosphorescence
emission.
Compared
to
baseline
molecule
X1,
experimental
results
show
by
230
ms,
while
X55
achieves
an
extension
260
ms.
Furthermore,
highlight
potential
this
molecules
use
transparent,
programmable
tags.
work
not
only
expands
types
but
also
provides
innovative
strategies
designing
long-lived,
high-quantum-yield
molecules.
We
envision
will
advance
smart
device
field
their
practical
applications,
intelligent
labels,
tags,
optical
sensors.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 11, 2025
Abstract
The
pursuit
of
sustainable,
high‐performance
organic
ultralong
room
temperature
phosphorescence
(OURTP)
materials
with
stimulus‐responsive
properties
presents
a
significant
and
enticing
yet
formidable
challenge.
Herein,
an
efficient
strategy
to
confining
boric
acid‐based
compounds
into
biomass
macrocycle
γ‐cyclodextrin
through
multiple
interactions
is
developed,
enabling
the
construction
multicolor
OURTP
doped
systems.
synergistic
effects
strong
hydrogen
bonding,
C─O─B
covalent
cross‐linking,
host–guest
encapsulation
significantly
suppress
non‐radiative
transition,
culminating
in
extraordinary
lifetime
excellent
quantum
yield
4.65
s
32.8%,
respectively,
which
are
far
superior
reported
RTP
materials.
Additionally,
merging
phosphors
contributes
stimulus
responses,
overcoming
inherent
limitations
degradation
recycling
compounds,
dynamically
modulating
signals
multiple‐stimulus
achieving
integration
multifunctional
dynamic
data
processing
techniques.
This
work
will
provide
direction
for
new
environmentally
friendly
potentially
commercially
available
The Journal of Physical Chemistry Letters,
Год журнала:
2025,
Номер
unknown, С. 3904 - 3910
Опубликована: Апрель 10, 2025
The
El-Sayed
rule
proposes
that
heteroatom-containing
chromophores
can
enhance
the
intersystem
crossing
rate
by
inducing
nπ*
transitions.
However,
extracting
high
radiation
from
triplet
state
is
often
challenging
due
to
small
transition
dipole
moment.
Herein,
we
demonstrate
introducing
benzoyl
group
in
a
N-fused
chromophore
(BPM)
increases
dipole.
Connecting
two
heads
with
non-bonded
electron
pairs
leads
an
enhanced
facilitates
multi-fold
enhancement
compared
native
ring.
deuterated
form
of
BPM
provides
room-temperature
phosphorescence
yield
54.1%
and
long
lifetime
0.32
s.
As
result,
concentration
1.7
×
10-2
M
for
yellow
afterglow
was
achieved
first
time,
enabling
high-resolution
imaging
nanoparticles
aqueous
medium.
Enhancing
heavy-atom-free
organic
could
be
practical
strategy
harvesting
excitons.
Physical Chemistry Chemical Physics,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Recent
advances
in
organic
afterglow
materials,
especially
dopant–matrix
systems,
highlight
the
synergy
between
luminophore
design
and
matrix
function,
offering
new
opportunities
for
persistent
luminescence
future
high-value
applications.
Advanced Optical Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 27, 2025
Abstract
Organic
room‐temperature
phosphorescence
(RTP)
materials
have
attracted
significant
attention
for
their
promising
applications,
yet
achieving
high‐efficiency
RTP
molecules
remains
challenging.
To
address
this,
a
comprehensive
dataset
of
donor–acceptor
(D–A)
structured
is
developed
using
D
and
A
fragment
pools.
Promising
phosphorescent
candidates
can
be
efficiently
identified
through
high‐throughput
screening
that
combines
density
functional
theory
(DFT)
with
high‐precision
multireference
perturbation
calculations.
key
innovation
the
introduction
“separate
control
model”,
which
independently
optimizes
both
spin–orbit
coupling
(SOC)
singlet‐triplet
energy
gap
(Δ
E
ST
).
Using
this
method,
unit
5,5‐dioxido‐10‐(phenanthren‐9‐yl)‐10H‐phenothiazin‐3‐yl)(phenyl)
methanone
(PPTZO‐CO),
exhibits
an
exceptionally
high
intersystem
crossing
(ISC)
rate
constant
10¹¹
s⁻¹,
representing
highest
value
reported
in
organic
systems
to
date.
Remarkably,
lifetime
PPTZO‐CO
reaches
up
700
ms
when
doped
into
polymethyl
methacrylate
(PMMA).
Co‐doping
rhodamine
B
(RB)
PMMA
yields
red
afterglow
emission
near
100%
transfer
efficiency,
co‐doped
polymer
systems.
The
PPTZO‐CO@PMMA
system
demonstrates
promise
dynamic
anti‐counterfeiting,
showcasing
its
potential
practical
use.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(49)
Опубликована: Авг. 22, 2024
Abstract
Opto‐electronic
properties
and
device
performance
of
organic
semiconductors
are
mainly
determined
by
energy
levels
their
frontier
molecular
orbitals,
e.g.
lowest
unoccupied
orbital
(
E
LUMO
)
highest
occupied
HOMO
in
the
ground
state,
first
singlet
state
S1
triplet
T1
excited
state.
These
always
intricately
intertwined.
Herein,
we
report
a
series
monodisperse
oligomers
based
on
double
B←N
bridged
bipyridine
(BNBP)
units.
With
increasing
number
repeating
units,
exhibit
gradually
downshifted
nearly
unchanged
due
to
different
distribution
orbitals
oligomers.
Moreover,
decreasing
because
contributions
charge
transfer
component
This
work
provides
new
insight
into
level
tuning
semiconductors,
which
is
important
for
high‐performance
opto‐electronic
devices.
Chemical Science,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 1, 2024
Photocatalytic
molecular
oxygen
activation
has
emerged
as
a
valuable
tool
for
organic
synthesis,
environmental
remediation
and
energy
conversion.
Most
reported
instances
have
relied
on
high-energy
light
sources.
Herein,
9-fluorenone-functionalized
porous
polymers
(POPs)
were
to
enable
red-light-excited
photocatalysis
the
oxygenation
reaction.
Notably,
this
modification
extends
conjugated
backbone,
allowing
capture
of
lower-energy
light.
Incorporating
ketone
groups
into
POPs
also
facilitates
charge
separation
enhances
carrier
concentration,
thereby
promoting
catalytic
efficiency.
The
new
POP
photomaterials
exhibit
high
activity
direct
α-oxygenation
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(43), С. 59004 - 59014
Опубликована: Окт. 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
