Four
molecules
bearing
carbazole
(Cz),
phenoxazine
(PXZ)
and
phenothiazine
(PTZ)
as
donor
groups
to
diphenylsulfone
acceptor
have
been
reported.
Molecule
containing
Cz
just
shows
thermally
activated
delayed
fluorescence
(TADF)
property,
but
PXZ
PTZ
display
TADF
aggregation-induced
emission
(AIE)
properties.
In
this
work,
a
thorough
investigation
was
done
on
four
in
order
resolve
the
AIE
mechanism
originated
from
groups.
The
combination
of
molecular
dynamics
quantum
chemistry
study
indicates
that
property
DPS-PTZ
is
reason
environment
thin
film
restricts
twist,
decreases
non-radiative
decay
leads
for
DPS-PTZ.
For
DPS-PXZ,
result
path
single
excited
state
(S1)
leading
conical
interaction
(CI)
via
enlarging
C-S-C
angle
key
factor
possessing
property.
DPS-PXZ
follow
restricted
access
CI
(RACI)
model
because
twist
must
be
blocked
aggregate
state,
inhibiting
luminescence.
Discovering
wording
beneficial
providing
design
guidelines
development
new
systems
practical
applications.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(11), С. 7668 - 7678
Опубликована: Март 7, 2024
Organic
phosphors
integrating
circularly
polarized
persistent
luminescence
(CPPL)
across
the
visible
range
are
widespread
for
applications
in
optical
information
encryption,
bioimaging,
and
3D
display,
but
pursuit
of
color-tunable
CPPL
single-component
organics
remains
a
formidable
task.
Herein,
via
situ
photoimplanting
radical
ion
pairing
into
axial
chiral
crystals,
we
present
elucidate
an
unprecedented
double-module
decay
strategy
to
achieve
colorful
through
combination
stable
triplet
emission
from
neutral
diphosphine
doublet
radiance
photogenic
radicals
exclusive
crystalline
framework.
Owing
photoactivation-dependent
component
inherent
phosphorescence
asymmetric
environment,
CPL
vision
can
be
regulated
by
altering
photoactivation
observation
time
window,
allowing
glow
tuning
blue
orange
delayed
green
emission.
Mechanism
studies
clearly
reveal
that
this
electron
migration
environment
hybrid
n–π*
π–π*
instincts
responsible
afterglow
at
ambient
conditions.
Moreover,
demonstrate
displays
encryption
manipulation
both
excitation
times.
FlexMat.,
Год журнала:
2024,
Номер
1(2), С. 173 - 192
Опубликована: Июнь 14, 2024
Abstract
Purely
organic
room
temperature
phosphorescence
(RTP)
materials
have
shown
broad
application
prospects
in
light‐emitting
diodes
(OLEDs)
due
to
their
theoretical
100%
exciton
utilization,
cost‐effectiveness,
and
flexibility.
In
recent
years,
with
the
deepening
of
research,
various
luminescent
mechanisms
been
proposed,
RTP
made
significant
progress,
which
effectively
applied
OLEDs.
This
article
comprehensively
reviews
research
progress
OLEDs
introduces
development
a
series
high‐efficiency
from
perspective
molecular
design
strategies
photophysical
properties.
These
conclusions
draw
roadmap
address
inherent
challenges
utilizing
specifically
advance
investigation
Angewandte Chemie,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 12, 2025
Abstract
Metal–organic
frameworks
(MOFs)
have
been
proven
promising
ultralong
room
temperature
phosphorescence
(RTP)
materials
for
anticounterfeit
due
to
their
unique
optical
properties.
However,
it
remains
a
major
challenge
achieve
the
desired
phosphorescent
properties
limited
regulatory
methods
and
indistinct
mechanism.
Herein,
coordination
solvent
second
metal
ion
costrategy
is
firstly
proposed
prepare
seven
robust
heterometallic–organic
(HMOFs)
with
two
configurations,
ZnMg/Ca‐sol
[sol
=
H
2
O,
dimethylformamide
(DMF),
dimethylacetamide
(DMA),
formyldiethylamine
(DEF)]
ZnSr/Ba‐H
O
,
exhibiting
different
RTP.
The
tunable
lifetimes
within
14.5–195.4
ms
are
achieved
gradually
by
altering
type
of
alkaline
earth
metals,
solvent,
hydrogen‐bonding
in
HMOFs.
Significantly,
theoretical
calculations
reveal
that
promotion
spin–orbit
coupling
heavy
metals
rigid
constraint
on
skeleton
result
excellent
balance
between
high
quantum
yield
(
Ф
P
)
long
lifetime,
especially
ZnSr‐H
(6.8%,
195.4
ms).
Depending
wide‐range
tuning
RTP
great
stability,
HMOFs
successfully
applied
spatial‐time
resolved
anticounterfeiting
multilevel
information
encryption.
This
work
may
provide
new
approach
designing
target
while
resolving
contradiction
lifetime.
The Journal of Physical Chemistry Letters,
Год журнала:
2024,
Номер
15(9), С. 2436 - 2446
Опубликована: Фев. 23, 2024
Thermally
activated
delayed
fluorescence
(TADF)
molecules
with
aggregation-induced
emission
(AIE)
properties
hold
tremendous
potential
in
biomedical
sensing/imaging
and
telecommunications.
In
this
study,
a
multiscale
method
combined
thermal
vibration
correlation
function
(TVCF)
theory
is
used
to
investigate
the
photophysical
of
novel
TADF
molecule
CNPy-SPAC
toluene
crystal
amorphous
states.
state,
an
increase
radiative
rates
decrease
nonradiative
lead
AIE.
Additionally,
conformational
isomerization
effects
result
significantly
different
luminescent
efficiencies
between
two
structures.
Furthermore,
effect
allows
for
coexistence
three
configurations
state.
Among
them,
non-TADF
quasi-axial
(Qa)
configuration
may
facilitate
energy
transfer
TADF-characteristic
quasi-equal/quasi-equal-H
(Qe/Qe-H)
configurations,
enhancing
Moreover,
Qa
enables
rapid
electron
transport,
offering
self-doped
devices.
Our
work
elucidates
new
mechanism
AIE-TADF
molecules.
Angewandte Chemie International Edition,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 12, 2025
Metal-organic
frameworks
(MOFs)
have
been
proven
promising
ultralong
room
temperature
phosphorescence
(RTP)
materials
for
anti-counterfeit
due
to
their
unique
optical
properties.
However,
it
remains
a
major
challenge
achieve
the
desired
phosphorescent
properties
limited
regulatory
methods
and
indistinct
mechanism.
Herein,
coordination
solvent
second
metal
ion
co-strategy
is
firstly
proposed
prepare
seven
robust
heterometallic-organic
(HMOFs)
with
two
configurations:
ZnMg/Ca-sol
[sol
=
H2O,
dimethylformamide
(DMF),
dimethylacetamide
(DMA),
formyldiethylamine
(DEF)]
ZnSr/Ba-H2O,
exhibiting
different
RTP.
The
tunable
lifetimes
within
14.5-195.4
ms
are
achieved
gradually
by
altering
type
of
alkaline
earth
metals,
solvent,
hydrogen-bonding
in
HMOFs.
Significantly,
theoretical
calculations
reveal
that
promotion
spin-orbit
coupling
heavy
metals
rigid
constraint
on
skeleton
result
excellent
balance
between
high
quantum
yield
(ФP)
long
lifetime,
especially
ZnSr-H2O
(6.8%,
195.4
ms).
Depending
wide-range
tuning
RTP
great
stability,
HMOFs
successfully
applied
spatial-time
resolved
anti-counterfeiting
multi-level
information
encryption.
This
work
may
provide
new
approach
designing
target
while
resolving
contradiction
ФP
lifetime.
Journal of Materials Chemistry C,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 1, 2024
Lu-MOFs
with
formic
acid
as
the
sole
ligand
were
synthesized
by
a
formamide
hydrolysis
reaction.
The
luminescence
color
and
intensity
of
Lu–Eu-MOFs-bipy
can
be
controlled
energy
competition
transfer
between
4,4′-bipyridine
Eu
3+
.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(28)
Опубликована: Апрель 30, 2024
Abstract
Aggregation
is
a
conventional
method
to
enhance
the
quantum
yields
(QYs)
of
pure
organic
luminophores
due
restriction
intramolecular
motions
(RIM).
However,
how
realize
RIM
in
metal–organic
frameworks
(MOFs)
still
unclear
and
challenging.
In
this
work,
ligand
meta
‐anchoring
strategy
first
proposed
proved
be
an
effective
systematic
approach
restrict
MOFs
for
QY
improvement.
By
simply
shifting
substituent
position
from
para
,
resulting
MOF
significantly
enhanced
by
eleven‐fold.
The
value
even
higher
than
that
aggregates,
demonstrating
strong
effect
strategy.
introduction
co‐ligand
induces
appearance
visible
yellow
room
temperature
phosphorescence
with
lifetime
222
ms
enhancement
charge
transfer
between
donor
accepter
units.
present
work
thus
broadens
understanding
mechanism
new
perspective,
develops
novel
expands
applicable
objects
materials
organic–inorganic
hybrid
materials.
