Angewandte Chemie,
Journal Year:
2023,
Volume and Issue:
135(30)
Published: May 30, 2023
Abstract
Clusteroluminescence
(CL)
and
through‐space
interactions
(TSIs)
of
non‐conjugated
molecules
have
drawn
more
attention
due
to
their
unique
photophysical
behaviors
that
are
different
from
largely
conjugated
luminogens.
However,
achieving
red
even
near‐infrared
(NIR)
emission
such
systems
is
still
challenging
the
intrinsic
drawbacks
lack
theories
for
structure–property
relationships.
In
this
work,
six
phenolic
resins
designed
synthesized
based
on
two
molecule‐engineering
strategies:
increasing
number
TSIs
units
introducing
electron‐donating/‐withdrawing
groups.
All
verified
as
luminogens
with
CL
property
(CLgens),
first
example
CLgens
NIR
(maximum
wavelength
≥680
nm)
high
absolute
quantum
yield
(47
%)
reported.
Experiments
theoretical
analysis
reveal
types,
locally
excited
state
charge
transfer
state,
play
essential
roles
in
these
polymers,
which
could
be
manipulated
via
changing
structural
conformation
electron
density
or
altering
transition
behaviors.
This
work
not
only
provides
an
approach
manipulate
polymers
but
also
endows
commercially
available
practical
value
luminescence
materials.
Science Advances,
Journal Year:
2024,
Volume and Issue:
10(10)
Published: March 8, 2024
Developing
stable
room-temperature
phosphorescence
(RTP)
emission
without
being
affected
by
moisture
and
mechanical
force
remains
a
great
challenge
for
purely
organic
systems,
due
to
their
triplet
states
sensitive
the
infinitesimal
motion
of
phosphors
oxygen
quencher.
We
report
kind
highly
robust
phosphorescent
doping
rigid
phosphor
into
copolymer
(polyvinyl
butyral
resin)
matrix
with
balance
mutually
exclusive
features,
including
rigidly
hydrophilic
hydrogen
bond
network
elastically
hydrophobic
constituent.
Impressively,
these
RTP
polymeric
films
have
superior
adhesive
ability
on
various
surfaces
showed
reversible
photoactivated
lifetimes
up
5.82
seconds,
which
can
be
used
as
in
situ
modulated
anticounterfeit
labels.
They
maintain
bright
afterglow
over
25.0
seconds
under
practical
conditions,
such
storage
refrigerators,
soaking
natural
water
month,
or
even
subjected
strong
collisions
impacts.
These
findings
provide
deep
insights
developing
ultralong
materials
desirable
comprehensive
performance.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(31)
Published: April 17, 2024
Abstract
The
integration
of
advanced
functions
and
diverse
practical
applications
calls
for
multifunctional
liquid
crystal
elastomers
(LCEs);
however,
the
structure‐intrinsic
luminescence
excellent
mechanical
properties
LCEs
have
not
yet
been
explored.
In
this
study,
clusteroluminescence
(CL)‐based
(CL‐LCEs)
are
successfully
fabricated
without
depending
on
large
conjugated
structures,
thereby
avoiding
redundant
organic
synthesis
aggregation‐caused
quenching.
experimental
theoretical
results
reveal
that
secondary
amine
(–NH–)
imine
(–C
=
N–)
groups
play
vital
roles
in
determining
presence
fluorescence
CL‐LCEs.
Based
above
observation,
strategy
universalization
a
molecular
library
constructing
CL‐LCEs
further
demonstrated.
Meanwhile,
dynamic
bond
bonds
endows
CL‐LCE
system
with
rapid
self‐healing
under
mild
conditions
(70
°C
10
min),
stretchability,
adaptive
programmable
characteristics.
Furthermore,
self‐luminescent
performance
enables
visual
detection
process.
Finally,
CL‐based
information
storage
anticounterfeiting
realized
their
fiber
actuators
fluorescent
textiles
distinctive
chemistry
presented
work
has
significant
implications
elucidating
mechanism
CL
providing
new
strategies
rational
design
novel
LCE
materials.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 27, 2025
Abstract
Nonconventional
Luminescent
Materials
(NLMs)
with
distinctive
optical
properties
are
garnering
significant
attention.
A
key
challenge
in
their
practical
application
lies
precisely
controlling
emission
behavior,
particularly
achieving
excitation
wavelength‐independent
emission,
which
is
paramount
for
accurate
chemical
sensing.
In
this
study,
NLMs
(Y1,
Y2,
Y3,
and
Y4)
synthesized
via
a
click
reaction,
it
found
that
wavelength‐dependent
correlates
molecular
cluster
formation.
Rigid
Y2)
exhibit
excitation‐independent
dilute
solutions
nanoscale
clusters
but
become
excitation‐dependent
at
higher
concentrations
due
to
larger
Flexible
(Y3
always
show
indicating
tendency
While
these
high
photoluminescence
quantum
yields
(PLQYs)
(0.1
mg
mL
−1
)
up
38.0%,
they
suffer
from
aggregation‐caused
quenching
(ACQ)
the
solid
state
(as
low
as
0.5%).
These
findings
provide
insights
into
NLM
luminescence
mechanisms
offer
new
approach
tuning
properties.
With
excellent
properties,
facile
synthesis,
biocompatibility,
hold
promise
bioimaging
other
applications.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(30)
Published: May 30, 2023
Clusteroluminescence
(CL)
and
through-space
interactions
(TSIs)
of
non-conjugated
molecules
have
drawn
more
attention
due
to
their
unique
photophysical
behaviors
that
are
different
from
largely
conjugated
luminogens.
However,
achieving
red
even
near-infrared
(NIR)
emission
such
systems
is
still
challenging
the
intrinsic
drawbacks
lack
theories
for
structure-property
relationships.
In
this
work,
six
phenolic
resins
designed
synthesized
based
on
two
molecule-engineering
strategies:
increasing
number
TSIs
units
introducing
electron-donating/-withdrawing
groups.
All
verified
as
luminogens
with
CL
property
(CLgens),
first
example
CLgens
NIR
(maximum
wavelength
≥680
nm)
high
absolute
quantum
yield
(47
%)
reported.
Experiments
theoretical
analysis
reveal
types,
locally
excited
state
charge
transfer
state,
play
essential
roles
in
these
polymers,
which
could
be
manipulated
via
changing
structural
conformation
electron
density
or
altering
transition
behaviors.
This
work
not
only
provides
an
approach
manipulate
polymers
but
also
endows
commercially
available
practical
value
luminescence
materials.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 20, 2024
Abstract
The
development
of
persistent
room‐temperature
phosphorescent
(pRTP)
hydrogels
is
important
for
the
practical
applications
organic
phosphors.
Unfortunately,
phosphorescence
emission
nontraditional
luminogens
(NTLs)
can
be
strongly
quenched
by
water
in
hydrogel
networks.
Herein,
a
series
pRTP
organohydrogels
based
on
NTLs
are
prepared
dissolving
poly(vinyl
alcohol)
(PVA),
biuret
(BIU)
and
poly(maleic
acid)
(PMAc)
(or
other
nonaromatic
macromolecular
acids)
glycerol/water
mixed
solvent,
followed
simple
freezing‐thawing
treatment.
Very
impressively,
organohydrogel
exhibits
remarkable
excitation‐dependent
metal
cation‐responsive
with
maximum
lifetime
up
to
782.8
ms
at
ambient
conditions.
Moreover,
treated
cations
also
have
phosphorescence.
Multidimensional
information
encryption
achieved
simply
printing
solutions
onto
gel
surface
switching
irradiation
lights,
or
using
blocks
different
acids.
Structural
characterizations,
mechanical
tests,
comparative
studies
prove
that
hydrogen
bonding
between
BIU
chains
leads
rigidification
molecular
conformations
cooperative
effect
components
organohydrogels.
This
work
provides
reliable
strategy
preparation
long
afterglows
greatly
expands
materials.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(27)
Published: April 25, 2024
Abstract
Interpenetrated
metal–organic
frameworks
(MOFs)
with
nonaromatic
ligands
provide
a
unique
platform
for
adsorption,
catalysis,
and
sensing
applications.
However,
nonemission
the
lack
of
optical
property
tailoring
make
it
challenging
to
fabricate
smart
responsive
devices
interpenetrated
MOFs
based
on
ligand‐centered
emission.
In
this
paper,
pressure‐induced
aggregation
effect
is
introduced
in
Zn
4
O(ADC)
(Et
3
N)
6
(IRMOF‐0)
nanocrystals
(NCs),
where
carbonyl
groups
results
O
─
distances
smaller
than
sum
van
der
Waals
radii
(3.04
Å),
triggering
photoluminescence
turn‐on
behavior.
It
noteworthy
that
IRMOF‐0
NCs
display
an
ultrabroad
emission
tunability
130
nm
from
deep
blue
(440
nm)
yellow
(570
upon
release
ambient
conditions
at
different
pressures.
The
eventual
retention
through‐space
n–π*
interactions
degrees
via
pressure
treatment
primarily
responsible
achieving
controllable
multicolor
behavior
initially
nonemissive
NCs.
fabricated
phosphor‐converted
light‐emitting
diodes
pressure‐treated
exhibit
excellent
thermal,
chromaticity,
fatigue
stability.
proposed
strategy
not
only
imparts
new
vitality
but
also
offers
perspectives
advancements
field
displays
daylight
illumination.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(24)
Published: April 9, 2024
Organic
radicals
with
narrow
energy
gaps
are
highly
sought-after
for
the
production
of
near-infrared
(NIR)
fluorophores.
However,
current
repertoire
developed
organic
is
notably
limited,
facing
challenges
related
to
stability
and
low
fluorescence
efficiency.
This
study
addresses
these
limitations
by
achieving
stable
in
nonconjugated
poly(diphenylmethane)
(PDPM).
Notably,
PDPM
exhibits
a
well-balanced
structural
flexibility
rigidity,
resulting
robust
intra-/inter-chain
through-space
conjugation
(TSC).
The
within
PDPM,
coupled
strong
TSC,
yield
remarkable
full-spectrum
emission
spanning
from
blue
NIR
beyond
900
nm.
extensive
tunability
achieved
through
careful
adjustments
concentration
excitation
wavelength.
findings
highlight
efficacy
polymerization
stabilizing
introduce
novel
approach
developing
emitters
based
on
triphenylmethane
subunits.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(38)
Published: April 9, 2024
Abstract
Non‐conjugated
luminescent
polymers
have
received
much
attention
due
to
their
excellent
flexibility,
processability,
and
biocompatibility.
However,
the
single
emission
color
low
solid‐state
luminescence
efficiency
restrict
further
development.
Herein,
by
introducing
carboxyl‐terminated
alkyl
chains
on
rigid
helical
polymaleimide
backbone,
a
series
of
non‐conjugated
are
designed
synthesized.
Due
“spring
lock”
formed
synergism
scalable
main
flexible
side
chains,
these
exhibit
effective
cluster
with
thermally
activated
delayed
fluorescence
(TADF)
property,
thereby
significantly
improving
quantum
yield
up
59.6%.
The
TADF
wavelengths
polymer
powders
can
be
tuned
from
498
639
nm
through
changing
reaction
solvents,
because
conformation
forming
clusters
is
sensitive
solvent
polarity.
Interestingly,
metal
ions
induce
construct
self‐repairing
gels,
which
show
potential
applications
in
ammonia
detection
information
encryption.
This
work
not
only
provides
an
design
strategy
for
colorful
high‐efficiency
TADF,
but
also
reveals
mechanism
enlightens
promising
gels.
