The Journal of Physical Chemistry C,
Год журнала:
2024,
Номер
128(17), С. 7169 - 7176
Опубликована: Апрель 18, 2024
Achieving
high
performance
room-temperature
phosphorescence
(RTP)
with
a
clearly
understood
mechanism
is
highly
desired.
In
this
work,
efficient
RTP
materials
delayed
emission
quantum
yield
of
50%
were
synthesized
through
loading
thiophenes
into
the
matrix
inorganic
boric
acid
(BA).
The
mechanisms
clarified
structural,
photophysical,
and
theoretical
studies
produced
by
series
BA
matrix.
Our
study
demonstrated
critical
role
molecular
interactions
between
thiophenes.
Covalent
bonds
have
strengthened
hydrogen
to
modulate
photophysical
properties
thiophenes,
which
reduced
energy
gap
singlet
triplet
states.
color
lifetime
could
be
well-tuned
substituting
chemical
groups
on
skeleton
endowed
their
applications
information
encryption.
These
results
opened
door
for
designing
various
as
well
clear
studying
host–guest
systems.
Advanced Science,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 16, 2024
Abstract
Mechanically
robust
and
tough
polymeric
materials
are
in
high
demand
for
applications
ranging
from
flexible
electronics
to
aerospace.
However,
achieving
both
toughness
strength
polymers
remains
a
significant
challenge
due
their
inherently
contradictory
nature.
Here,
universal
strategy
enhancing
the
of
polymer
blends
using
ligand‐modulated
metal–organic
framework
(MOF)
nanoparticles
is
presented,
which
engineered
have
adjustable
hydrophilicity
lipophilicity
by
varying
types
ratios
ligands.
Molecular
dynamics
(MD)
simulations
demonstrate
that
these
can
effectively
regulate
interfaces
between
chemically
distinct
based
on
amphiphilicity.
Remarkably,
mere
0.1
wt.%
MOF
with
optimized
amphiphilicity
(ML‐MOF
(5:5)
)
delivered
≈1.1‐
≈34.1‐fold
increase
poly
(lactic
acid)
(PLA)/poly
(butylene
succinate)
(PBS)
blend,
respectively.
Moreover,
amphiphilicity‐tailorable
universally
enhance
mechanical
properties
various
blends,
such
as
polypropylene
(PP)/polyethylene
(PE),
PP/polystyrene
(PS),
PLA/poly
adipate‐co‐terephthalate)
(PBAT),
PLA/polycaprolactone
(PCL)/PBS.
This
simple
method
offers
potential
strengthening
toughening
blends.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(46)
Опубликована: Июль 9, 2024
Abstract
In
recent
years,
there
is
a
growing
interest
in
developing
ultralong
organic
room‐temperature
phosphorescence
(ORTP)
with
lifetimes
the
range
of
seconds.
As
one
important
three
primary
colors,
blue
ORTP
an
indispensable
core
component
RTP
regulation
and
application,
however,
large
Stokes
shift
characteristics
pose
certain
challenges
ORTP.
Here,
new
family
phosphors
are
synthesized
realized
through
crystal
assembly
water
phase.
Remarkably,
compared
to
materials
obtained
phases,
enabled
long‐lived
up
2.3
s
quantum
yield
reached
as
high
29.27%.
addition
efficient
green
form,
such
dark
possessed
thermal
stability
flexible
tunability.
Moreover,
superiority
selected
components
demonstrated
by
comparing
them
polymer
proposed
show
great
potential
programmable
information
encryption/anti‐counterfeiting.
The Journal of Physical Chemistry A,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 7, 2025
Organic
room-temperature
phosphorescence
(RTP)
emitters
with
long
lifetimes,
high
exciton
utilizations,
and
tunable
emission
properties
show
promising
applications
in
organic
light-emitting
diodes
(OLEDs)
biomedical
fields.
Their
excited-state
are
highly
related
to
single
molecular
structure,
aggregation
morphology,
external
stimulus
(such
as
hydrostatic
pressure
effect).
To
gain
a
deeper
understanding
effectively
regulate
the
key
factors
of
luminescent
efficiency
lifetime
for
RTP
emitters,
we
employ
thermal
vibration
correlation
function
(TVCF)
theory
coupled
quantum
mechanics/molecular
mechanics
(QM/MM)
calculations
investigate
photophysical
three
reported
crystals
(Bp-OEt,
Xan-OEt,
Xan-OMe)
elastic/plastic
deformation.
By
analyzing
geometric
structures
stacking
modes
these
crystals,
observe
that
structure
variations
influence
electronic
structures,
subsequently
modifying
transition
energy
consumption
processes.
Specifically,
presence
strong
π–π
interactions
hydrogen
bonds
Xan-OEt
crystal
inhibits
nonradiative
decay
process,
thereby
realizing
long-lived
emission.
Additionally,
hybridized
local
charge-transfer
(HLCT)
feature
largest
charge
transfer
excitation
contributions
(57.74%)
stabilizes
triplet
excitons
facilitates
radiative
ultimately
achieving
emissions.
Furthermore,
by
applying
Bp-OEt
crystal,
efficiencies
lifetimes
enhanced
blue-shifted.
All
results
demonstrate
crucial
role
well
effect
regulating
properties.
Thus,
our
findings
reveal
structure-packing-property
relationship
highlight
control
packing
approaches,
which
could
provide
prospective
strategies
constructing
stimuli-responsive
practical
applications.
Abstract
Luminescence
in
organics
that
lasts
for
seconds
to
a
few
hours
after
light
excitation
has
been
reported
recently,
showcasing
significant
application
potentials
flexible
electronics
and
bioimaging.
In
contrast,
long‐lasting
luminescence
can
be
electrically
excited,
whether
or
inorganics,
is
much
rarer
often
less
efficient.
this
study,
we
report
persistent
(PersL)
organic
light‐emitting
diodes
(OLEDs)
over
100
s
an
energy
storage
effect
beyond
60
min
charging
with
direct‐current
electric
field.
Thermoluminescence
studies
reveal
the
PersL
OLEDs
induced
by
traps
formed
host‐guest
molecular
system
serving
as
emission
layer
(EML)
trap
depth
of
approximately
0.24
eV,
consistent
results
from
same
EML
materials
under
irradiation.
Integrating
electronic
spin
resonance,
density
functional
theory
calculations,
propose
model
delineating
charge
carrier
migration
responsible
trap‐induced
OLEDs.
This
study
on
may
deepen
our
understanding
mechanism
semiconductors
pave
way
expanding
their
applications
optoelectronics,
biological
detection
technologies.
image
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 26, 2025
Abstract
Polymeric
room
temperature
phosphorescence
(RTP)
materials
have
been
well
developed
and
utilized
in
various
fields.
However,
their
fast
thermo‐
moisture‐quenching
behavior
highly
limit
applications
certain
harsh
environments.
Therefore,
the
preparation
of
with
moisture‐resistant
is
greatly
attractive.
Compared
common
water‐soluble
polymers,
cycloolefin
copolymers
(COC)
show
outstanding
hydrophobicity
higher
rigidity,
even
at
elevated
temperatures,
being
as
a
promising
candidate
to
prepare
suppressed
behavior.
Herein,
type
COC
bearing
hydroxyl,
ester,
adamantanyl
side
groups
synthesized.
After
dispersing
phosphors
into
this
matrix,
resultant
composites
exhibit
full‐color
RTP
lifetimes
249–590
ms.
Their
luminescence
does
not
obvious
quenching
water,
acid,
alkalinous,
reductive,
oxidative
In
presence
both
rigid
matrix
phosphors,
corresponding
composite
displays
high‐temperature
performance.
Even
378
K,
can
emit
lifetime
40–98
The
these
COC‐based
for
imaging,
information
encryption,
anti‐counterfeiting
are
thus
explored.
The Journal of Physical Chemistry Letters,
Год журнала:
2025,
Номер
unknown, С. 1916 - 1923
Опубликована: Фев. 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
