Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
63(44), P. 21336 - 21344
Published: Oct. 22, 2024
In
recent
years,
metal–organic
framework
(MOF)
materials
with
long
persistent
luminescence
(LPL)
have
inspired
extensive
attention
and
presented
various
applications
in
security
systems,
information
anticounterfeiting,
biological
imaging
fields.
However,
obtaining
LPL
ultralong
lifetime
remains
challenging.
Halogen
atoms,
as
nonmetallic
elements
existing
the
frameworks,
can
not
only
induce
heavy-atom
effect,
effectively
enhancing
spin–orbit
coupling
promoting
intersystem
crossing
(ISC)
processes,
but
also
suppress
non-radiative
transition
of
triplet
states
through
intra-
intermolecular
interactions.
Specifically,
fluorine
atoms
strongest
electronegativity
may
form
aggregate
interlockings
halogen-bonding
interactions
that
restrict
molecular
motions
vibrations,
thereby
improving
phosphorescent
lifetime.
With
aforementioned
considerations,
two
distinct
types
MOFs
with/without
(namely,
Ca-MOF
5FCa-MOF)
were
synthesized.
Notably,
by
introducing
into
MOFs,
fluorine-induced
enhanced
5FCa-MOF
exceeding
264
ms
compared
to
(103.94
ms).
Remarkably,
both
displayed
bright
naked
eye
after
removal
irradiation
source,
especially
which
last
for
about
2
s.
By
exhibits
greatly
ISC
a
rate
constant
up
4.1
×
106
s–1
suppressed
decay
down
3.73
s–1,
extending
time.
The
thus
obtained
provides
potential
encryption,
optical
so
on.
Abstract
Persistent
luminescent
materials
can
continue
to
emit
light
after
stopping
excitation,
and
their
stored
energy
is
gradually
released
during
the
decay
time
persistent
emitting,
which
makes
color
luminance
changes
in
slow
plays
an
important
role
protecting
information
combating
forgery.
When
combined
with
other
anti‐counterfeiting
technologies
form
a
multi‐modal
multi‐process
design,
it
perfectly
hides
real
has
broad
application
prospect
logo
design.
A
brief
overview
of
design
three
different
luminescence‐based
applications
unimodality
achieve
encryption
dimension.
The
trap
studied
be
by
physical
stimuli
applied
stimulus‐like
responsive
materials,
luminescence
based
on
many
processes
dual‐modality,
obtaining
dynamic
effect
multiple
modes.
This
work
reviews
research
background
field
recent
years,
compares
breakthrough
progress
research,
finally
puts
forward
current
problems,
future
challenges,
development
directions.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(23)
Published: April 6, 2023
The
emergence
of
time-dependent
phosphorescence
color
(TDPC)
materials
has
taken
information
encryption
to
high-security
levels.
However,
due
the
only
path
exciton
transfer,
it
is
almost
impossible
obtain
TDPC
for
chromophores
with
a
single
emission
center.
Theoretically,
in
inorganic-organic
composites,
transfer
organic
depends
on
inorganic
structure.
Here,
we
assign
two
structural
effects
NaCl
by
metal
(Mg2+
or
Ca2+
Ba2+
)
doping,
which
triggers
performance
carbon
dots
(CDs)
resulting
material
used
multi-level
dynamic
3D
coding
achieve
encryption.
confinement
activates
green
CDs;
while
defect
tunneling-related
yellow
phosphorescence.
Such
simply
doped
matrices
can
be
synthesized
using
periodic
table
cations,
endowing
tremendous
control
over
properties.
This
demonstration
extends
design
view
luminescent
materials.
The Journal of Physical Chemistry Letters,
Journal Year:
2023,
Volume and Issue:
14(7), P. 1794 - 1807
Published: Feb. 10, 2023
Small
molecular
host–guest
doped
materials
exhibit
superiority
toward
high-efficiency
room-temperature
phosphorescence
(RTP)
due
to
their
structural
design
diversity
and
ease
of
preparation.
Dynamic
RTP
display
excellent
characteristics,
such
as
good
reversibility,
quick
response,
tunable
luminescence
ability,
making
them
applicable
various
cutting-edge
technologies.
Herein,
we
summarize
the
advances
in
dynamic
that
respond
external
internal
stimuli
present
some
insights
into
strategies
underlying
mechanisms.
Subsequently,
specific
viewpoints
are
described
regarding
this
promising
field
for
development
materials.
This
Perspective
is
highly
beneficial
future
intelligent
applications
systems.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
63(5)
Published: Dec. 12, 2023
Organic
near-infrared
room
temperature
phosphorescence
(RTP)
materials
offer
remarkable
advantages
in
bioimaging
due
to
their
characteristic
time
scales
and
background
noise
elimination.
However,
developing
RTP
for
deep
tissue
imaging
still
faces
challenges
since
the
small
band
gap
may
increase
non-radiative
decay,
resulting
weak
emission
short
lifetime.
In
this
study,
fused-ring
pyrrole-based
structures
were
employed
as
guest
molecules
construction
of
long
wavelength
emissive
materials.
Compared
decrease
singlet
energy
level,
triplet
level
showed
a
more
effectively
with
conjugation
substituent
groups.
Moreover,
sufficient
fused
ring
molecule
suppresses
decay
excitons.
Therefore,
material
(764
nm)
was
achieved
penetration
bioimaging.
Tumor
cell
membrane
is
used
coat
nanoparticles
(NPs)
avoid
decreasing
performance
compared
traditional
coating
by
amphiphilic
surfactants.
NPs
tumor-targeting
properties
show
favorable
phosphorescent
properties,
superior
stability,
excellent
biocompatibility.
These
are
applied
time-resolved
luminescence
eliminate
interference
penetration.
This
study
provides
practical
solution
prepare
long-wavelength
long-lifetime
organic
applications
Advanced Optical Materials,
Journal Year:
2023,
Volume and Issue:
12(7)
Published: Oct. 26, 2023
Abstract
Colloidal
carbon
dots
(C‐dots)
are
considered
as
promising
heavy‐metal‐free
materials
to
achieve
room‐temperature
phosphorescence
(RTP)
properties
for
applications,
such
photoelectronic
devices,
information
encryption,
and
bio‐imaging.
However,
most
of
the
current
obtained
RTP
C‐dots
have
a
short
lifetime
with
relatively
low
quantum
yield
(QY).
In
this
work,
large‐scale
synthesized
via
vacuum
heating
approach
multiple
emissions
(blue,
green,
yellow),
long
high
1.92
s,
QY
34.4%
by
selecting
different
types
precursors,
which
is
superior
reported
C‐dots.
The
atoms
doping
strong
bonding
between
neighbored
promoted
contributes
excellent
properties.
As
proof‐of‐concept,
as‐obtained
used
optical
ink
flexible
security
codes,
exhibiting
bright
shape
1.37
s.
This
work
offers
an
efficient
producing
high‐quality
C‐dots,
can
be
applied
anti‐counterfeiting
encryption
systems.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(52)
Published: Sept. 13, 2023
Abstract
Organic
room
temperature
phosphorescence
(RTP)
materials
have
become
a
hot
topic
in
the
field
of
luminescence
wherein
crystalline
porous
organic
frameworks
(metal–organic
(MOFs),
hydrogen‐bonded
(HOFs),
covalent
(COFs))‐based
RTP
are
receiving
considerable
attention.
Beyond
all
doubt,
frameworks‐based
perfectly
integrate
advantages
and
materials.
This
review
provides
timely
brief
outline
for
development
including
construction
strategy
MOFs/HOFs/COFs‐based
their
performance
as
well
potential
applications.
Moreover,
conclusion
outlook
also
discussed
to
present
challenges
prospects
further
high‐performance
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: June 1, 2024
Abstract
Polymer-based
pure
organic
room-temperature
phosphorescent
materials
have
tremendous
advantages
in
applications
owing
to
their
low
cost,
vast
resources,
and
easy
processability.
However,
designing
polymer-based
with
large
Stokes
shifts
as
key
requirements
biocompatibility
environmental-friendly
performance
is
still
challenging.
By
generating
charge
transfer
states
the
gangplank
from
singlet
excited
triplet
doped
molecules,
we
find
a
host
molecule
(pyrrolidone)
that
affords
guest
excellent
can
be
easily
fabricated
when
polymerizing
molecule.
adding
polyaromatic
hydrocarbon
molecules
electron-donor
polyvinylpyrrolidone,
efficient
intersystem
crossing
tunable
green
near-infrared
achieved,
maximum
phosphorescence
wavelength
lifetime
up
757
nm
3850
ms,
respectively.
These
polyvinylpyrrolidone
good
photoactivation
properties,
recyclability,
advanced
data
encryption,
anti-counterfeiting.
This
reported
design
strategy
paves
way
for
of
polyvinylpyrrolidone-based
materials.
Chemical Science,
Journal Year:
2024,
Volume and Issue:
15(12), P. 4222 - 4237
Published: Jan. 1, 2024
In
this
perspective,
the
progress
in
ion-regulated
organic
RTP
materials
and
described
roles
of
ions,
including
ion–π
interactions,
electrostatic
coordinate
have
been
summarized.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(26)
Published: Feb. 28, 2024
Abstract
Organic
luminescent
materials
exhibiting
persistent
room
temperature
phosphorescence
(RTP)
have
garnered
considerable
interest
due
to
their
versatile
applications.
However,
the
mechanism
is
still
unclear,
especially
for
molecular
structure‐molecular
arrangement‐property
relationship.
Herein,
six
derivatives
of
phenothiazine
5,5‐dioxide
are
synthesized,
revealing
distinct
RTP
properties
and
associated
underlying
mechanisms.
Careful
analyses
single
crystal
structures,
combined
with
initial
theoretical
calculations,
indicate
that
effect
facilitated
by
effective
intermolecular
π–π
interactions
in
solid
state
led
folded
conformation.
Specifically,
PTZO‐CF
3
‐3F
exhibits
distinctive
photo‐activated
both
grinding
response
changes
arrangement.
Besides,
a
porous
structure
found
be
present
‐2F
crystal,
offering
it
great
sensitivity
oxygen
intensity
lifetime.
Accordingly,
visual
warning
device
fabricated
successfully.
Furthermore,
successfully
utilized
applications
anti‐counterfeiting
optical
logic
gates,
expanding
scope
stimulus‐responsive
broader
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(18)
Published: March 8, 2024
A
general
approach
to
constructing
room
temperature
phosphorescence
(RTP)
materials
involves
the
incorporation
of
a
phosphorescent
emitter
into
rigid
host
or
polymers
with
high
glass
transition
temperature.
However,
these
often
suffer
from
poor
processability
and
suboptimal
mechanical
properties,
limiting
their
practical
applications.
In
this
work,
we
developed
benzothiadiazole-based
dialkene
(BTD-HEA),
multifunctional
remarkable
yield
intersystem
crossing
(Φ
