Molecules,
Год журнала:
2024,
Номер
29(19), С. 4537 - 4537
Опубликована: Сен. 24, 2024
Due
to
their
low
cost,
good
biocompatibility,
and
ease
of
structural
modification,
organic
long-persistent
luminescence
(LPL)
materials
have
garnered
significant
attention
in
light-emitting
diodes,
biological
imaging,
information
encryption,
chemical
sensing.
Efficient
charge
separation
carrier
migration
by
the
host–guest
structure
or
using
polymers
crystal
build
rigid
environments
are
effective
ways
preparing
high-performance
with
long-lasting
afterglow.
In
this
study,
four
types
crystalline
(MODPA:
DDF-O,
MODPA:
DDF-CHO,
DDF-Br,
DDF-TRC)
were
prepared
a
convenient
doping
method
at
room
temperature
under
ambient
conditions,
i.e.,
presence
oxygen.
The
first
three
exhibited
long-lived
charge-separated
(CS)
states
achieved
visible
LPL
emissions
durations
over
7,
4,
2
s,
respectively.
More
surprisingly,
for
DDF-O
material
PMMA
as
polymer
substrate,
afterglow
time
DDF-O:
was
longer
than
10
s.
persistent
room-temperature
phosphorescence
effect
caused
different
CS
state
generation
efficiencies
environment
main
reason
difference
duration.
fourth
without
no
because
it
not
D-A
system.
research
results
indicate
that
efficiency
key
factors
affecting
properties.
This
work
provides
new
understandings
designing
materials.
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 17, 2025
Abstract
Preparing
multi‐color
and
multi‐stimuli‐responsive
circularly
polarized
luminescence
(CPL)
materials
understanding
the
evolution
of
chirality
through
visualized
mode
is
still
a
challenge.
Here,
an
encapsulation
engineering
approach
chiral
metal‐organic
frameworks
(MOFs)
proposed
to
confine
guest
emitters
realize
CPL.
Based
on
triplet‐triplet
energy
transfer
(TTET),
white
CPL
near‐infrared
room
temperature
phosphorescence
(NIR‐CPRTP)
can
be
obtained
by
introducing
pyrene
derivatives.
With
introduction
containing
vinylpyrene
group,
light‐
thermal‐responsive
with
signal
inversion
realized
reversible
[2+2]
cycloaddition
reaction
between
ligand
triggered
visible
light/ultraviolet
light
or
heating.
Furthermore,
excitation‐dependent
successfully
achieved
incorporation
excited
state
intramolecular
proton
(ESIPT)
molecules
into
nanopores.
Importantly,
magnification
greatly
enhanced
spatial
confinement,
accurate
host‐guest
single
crystal
structures
FLT@DCF‐12
FLT@LCF‐12
provide
understand
mechanism
transfer,
amplification
responsiveness.
White
LED
multiple
information
display
encryption
are
further
demonstrated.
This
breakthrough
provides
new
perspective
guest‐encapsulated
MOFs
contributes
construction
stimuli‐responsive
CPL‐active
materials.
Chemistry - An Asian Journal,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 14, 2025
Abstract
Six
monosubstituted
phenazine
derivatives
were
designed
and
synthesized
for
constructing
cocrystals
to
investigate
their
structure–property
relationship.
It
was
found
that
2‐substituted
phenazines
could
form
with
2,6‐dimethylphenylboronic
acid
(DBA).
These
exhibited
red‐shifted
enhanced
luminescence
relative
individual
components,
especially
2NP‐DBA
whose
efficiency
nearly
100
times
higher
than
of
2NP.
By
analyzing
the
single‐crystal
structures
hydrogen
bonds
π–π
interactions
between
molecules
detected
in
cocrystals,
which
suppressed
nonradiative
transition
pathways.
Consequently,
all
three
demonstrated
strong
continuous
interactions,
differed
from
previously
reported
enhancement
resulting
destruction
interactions.
An
in‐depth
investigation
these
can
not
only
provide
a
better
understanding
structure‐property
relationship
organic
luminescent
materials,
but
also
help
develop
materials
intense
solid‐state
In
addition,
optical
response
acidic
vapors
has
been
successfully
applied
anti‐counterfeiting.
Chemical Communications,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
In
this
work,
the
synthesis
of
an
N-monoarylated
dihydrophenazine
is
reported
together
with
its
interconversion
to
oxidized
mono-cationic
form.
While
reduced
state
was
employed
for
dechlorination
aromatic
substrates,
one
exploited
formation
C-N
bonds
between
aryl
rings
and
azoles,
which
achieved
high
yields
very
low
catalyst
loadings
(down
0.5
mol%).
Advanced Optical Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 14, 2025
Abstract
Organic
room‐temperature
phosphorescence
(RTP)
with
rich
photophysical
properties
has
attracted
great
interest,
but
it
remains
a
big
challenge
to
realize
pure
RTP
without
fluorescence
in
steady‐state
photoluminescence
(SSPL)
and
blue‐shifted
that
intrinsically
restricted
by
the
spin‐forbidden
intersystem
crossing
(ISC)
radiative
decay
of
low‐lying
triplet
excited
state.
Herein,
two
fluorescence‐free
molecules
based
on
β‐diketone‐bridged
phenoselenazine/phenothiazine
are
developed,
which
contain
either
Se
or
S
heteroatom
phosphor
significantly
promote
ISC;
and,
both
isolated
J‐aggregated
phosphors
formed
crystal,
where
J‐aggregation
can
not
only
facilitate
ISC
for
also
strength
emission
high
phosphorescent
quantum
yield
22.3%,
while
affords
longer
lifetime
up
131
ms.
Excitingly,
(35
nm
compare
SSPL)
from
yellow‐green
(525
nm)
cyan
(490
dynamically
depending
time
temperature
is
observed
first
time.
Experimental
theoretical
results
indicate
regulation
time/temperature‐dependent
attributed
different
lifetimes
aggregated
owing
dynamic
competition
between
accumulation
modes
crystal
aided
interrupted
conjugation
sp
3
C
β‐diketone.
Macromolecular Chemistry and Physics,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 8, 2025
Abstract
In
recent
years,
organic
room
temperature
phosphorescence
(RTP)
materials
have
been
well
developed.
Especially,
when
the
compounds
are
doped
into
a
rigid
polymeric
matrix,
their
RTP
performances
can
be
greatly
enhanced.
However,
dispersibility
and
stability
of
difficult
to
controlled.
Herein,
an
amorphous
homo‐polymer
(
P1
)
containing
naphthalimide
units
is
synthesized
further
dispersed
polyvinyl
alcohol
(PVA)
matrix
via
solution
mixing
procedure.
The
resultant
composites
P1@PVA
exhibit
yellow
afterglow
under
temperature.
,
chromophores
constrained
in
aggregation
state.
Unlike
crystalline
state,
intermolecular
interactions
between
aggregated
enhanced,
while
π–π
interaction
weakened.
presence
PVA,
non‐radiative
decay
synergistically
suppressed
by
external
hydrogen
bonds
internal
interactions.
As
results,
much
Comparing
with
PVA
compounds,
lifetime
prolonged
as
1.5
folds.
Materials,
Год журнала:
2024,
Номер
17(22), С. 5417 - 5417
Опубликована: Ноя. 6, 2024
Solution-processable
hole-transporting
materials
(HTMs)
that
form
highly
soluble
films
and
thermally
stable
amorphous
states
are
essential
for
advancing
optoelectronic
devices.
However,
the
currently
commercialized
HTM,
N,N-bis(3-methylphenyl)-N,N0-bis(phenyl)benzidine
(TPD),
exhibits
poor
solubility
limited
carrier
transport
when
spin-coated
into
thin
films.
Herein,
to
address
these
issues,
a
fluorenyl
group
was
ingeniously
incorporated
series
of
molecules
structurally
similar
TPD.
The
resulting
compounds,
namely,
2,7-di-(N,N-diphenylamino)-9,9-dimethyl-9H-fluorene
(DDF),
2,7-di-p-tolyl-(N,N-diphenylamino)-9,9-dimethyl-9H-fluorene
(2M-DDF),
2,7-di-tetra-p-tolyl-(N,N-diphenylamino)-9,9-dimethyl-9H-fluorene
(4M-DDF),
offered
tunable
energy
levels,
transport,
crystallinity,
steric
configuration
via
adjustment
number
terminal
methyl
groups.
Owing
its
satisfactory
performance,
2M-DDF
can
serve
as
an
effective
alternative
TPD
in
OLED
devices
well
guest
molecule
host-guest
systems
long-afterglow
materials.
Devices
incorporating
with
Alq
