Angewandte Chemie,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 24, 2024
Abstract
Organic
cocrystals
formed
through
multicomponent
self‐assembly
have
attracted
significant
interest
owing
to
their
clear
structure
and
tunable
optical
properties.
However,
most
cocrystal
systems
suffer
from
inefficient
long‐wavelength
emission
low
phosphorescence
efficiency
due
strong
non‐radiative
processes
governed
by
the
energy
gap
law.
Herein,
an
efficient
long‐lived
red
afterglow
is
achieved
using
a
pyrene
(Py)
system
incorporating
second
component
(NPYC4)
with
thermally
activated
delayed
fluorescence
(TADF)
ultralong
organic
(UOP)
The
(NPYC4‐Py)
not
only
inherits
excellent
luminescence
of
its
monomeric
counterparts,
but
also
exhibits
unique
dual‐mode
characteristics,
including
persistent
TADF
UOP
high
quantum
yield
58
%
lifetime
362
ms.
precise
stacking
distinctly
reveals
that
intermolecular
interactions
lock
formation
weaken
π‐π
between
NPYC4
Py,
thereby
stabilizing
excited
triplet
excitons.
Furthermore,
favorable
level
acts
as
bridge,
reducing
S
1
T
states
for
therefore
activating
Py.
This
research
provides
direct
insights
into
achieving
co‐crystallization.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 11, 2025
Abstract
The
pursuit
of
sustainable,
high‐performance
organic
ultralong
room
temperature
phosphorescence
(OURTP)
materials
with
stimulus‐responsive
properties
presents
a
significant
and
enticing
yet
formidable
challenge.
Herein,
an
efficient
strategy
to
confining
boric
acid‐based
compounds
into
biomass
macrocycle
γ‐cyclodextrin
through
multiple
interactions
is
developed,
enabling
the
construction
multicolor
OURTP
doped
systems.
synergistic
effects
strong
hydrogen
bonding,
C─O─B
covalent
cross‐linking,
host–guest
encapsulation
significantly
suppress
non‐radiative
transition,
culminating
in
extraordinary
lifetime
excellent
quantum
yield
4.65
s
32.8%,
respectively,
which
are
far
superior
reported
RTP
materials.
Additionally,
merging
phosphors
contributes
stimulus
responses,
overcoming
inherent
limitations
degradation
recycling
compounds,
dynamically
modulating
signals
multiple‐stimulus
achieving
integration
multifunctional
dynamic
data
processing
techniques.
This
work
will
provide
direction
for
new
environmentally
friendly
potentially
commercially
available
Abstract
Stimulus‐responsive
organic
room
temperature
phosphorescent
(RTP)
materials
have
received
significant
attention
in
bioimaging,
sensing,
and
data
storage
because
of
their
controllable
dynamic
variability
rapid
response.
Organic
co‐crystals,
with
tailor‐designed
optical
properties
through
manipulation
aggregate
structures,
proven
to
be
very
effective
elucidating
the
structure‐property
relationship
RTP
at
molecular
level.
Therefore,
enhancing
rigid
frameworks
that
promote
intersystem
crossing
is
a
valid
approach.
Notably,
realization
co‐crystal
performance
by
altering
components
or
adjusting
crystal
lattices
highly
appealing;
however,
this
has
not
been
fully
addressed.
In
study,
an
co‐crystal,
4,4′‐bipyridine
(44BD),
was
employed
as
host,
1,4‐diiodotetrafluorobenzene
(DITF)
4‐bromo‐2,3,5,6‐tetrafluorobenzoic
acid
(TFBA)
were
guests.
The
44BD‐DITF
exhibited
orange
RTP,
whereas
44BD‐TFBA
displayed
bright
yellow
RTP.
Crystal
analysis
theoretical
calculations
revealed
dense
packing
abundant
intermolecular
interactions
within
these
co‐crystals
are
crucial
for
emergence
both
show
reversible
acid/base
stimulus
response,
is,
exposure
hydrochloric
(HCl)
fumes
results
quenching
which
can
subsequently
restored
triethylamine
(TEA)
fumigation.
This
study
presents
approach
towards
switching
thus
offering
opportunities
development
stimulus‐responsive
next‐generation
applications.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(31), С. 22056 - 22063
Опубликована: Июль 24, 2024
Activating
delayed
fluorescence
emission
in
a
dilute
solution
via
non-covalent
approach
is
formidable
challenge.
In
this
report,
we
propose
strategy
for
efficient
generation
using
supramolecularly
engineered
cyclophane-based
nanoenvironments
that
provide
sufficient
binding
strength
to
π-conjugated
guests
and
can
stabilize
triplet
excitons
by
reducing
vibrational
dissipation
lowering
the
singlet-triplet
energy
gap
emission.
Toward
goal,
novel
biphenyl
bisimide-derived
cyclophane
introduced
as
an
electron-deficient
triplet-generating
host.
Upon
encapsulation
of
various
carbazole-derived
inside
nanocavity
cyclophane,
emissive
charge
transfer
(CT)
states
close
level
bisimide
are
generated.
The
experimental
results
host-guest
studies
manifest
high
association
constants
up
10
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 8, 2025
Abstract
Dynamic
organic
room‐temperature
phosphorescence
(RTP)
glasses
with
color
tunability
offer
significant
potential
for
practical
applications
due
to
their
high
transparency
and
excellent
machinability.
In
this
study,
efficient
dynamic
RTP
properties
are
used
as
triplet
donors,
combined
commercially
available
chromophores
singlet/triplet
acceptors,
successfully
fabricate
a
series
of
host‐guest
doping
color‐tunable
afterglow
responses
external
stimuli.
The
energy
transfer
mechanisms,
including
triplet‐to‐singlet
resonance
Dexter‐type
triplet‐to‐triplet
transfer,
confirmed
using
state‐of‐the‐art
femtosecond
time‐resolved
transient
absorption
spectroscopy.
These
demonstrate
transparency,
good
machinability,
responsiveness
study
highlights
in
large‐area
glass
fabrication,
data
encryption,
flexible
displays.
This
work
not
only
provides
simple
design
principle
developing
novel
materials
but
also
promotes
the
information
encryption
optoelectronics.
Metal–organic
cycle/cages
(MOCs)
are
a
class
of
molecular
structures
characterized
by
their
unique
shapes
and
dimensions,
created
using
the
systematic
combination
an
organic
donor
metal
center.
Due
to
versatile
properties,
MOCs
highly
useful
in
materials
science.
Owing
structural
photoelectric
polycyclic
aromatic
hydrocarbons
have
significant
application
potential
optoelectronic
devices,
chemical
sensing,
biomedical
fields.
Fluorescent
constructed
with
units
such
as
anthracene
pyrene
backbones
show
fluorescence
properties
broad
applications
recognition,
bioimaging,
functional
materials.
This
review
highlights
latest
research
progress
on
these
multiple
areas,
including
luminescence,
resonance
energy
transfer,
host–guest
chemistry,
bioimaging.
In
addition,
design
strategies
related
involving
conformational
distortions
cycloaddition
reactions
discussed.
provides
summary
advances
this
field
during
past
three
years.
Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Май 15, 2025
Abstract
Organic
afterglow
materials,
known
for
their
unique
luminescent
properties
and
diverse
applications,
have
garnered
significant
attention
in
recent
years.
However,
developing
long-lasting,
high-efficiency,
full-color
systems
exploring
simple
materials
processing
strategies
new
applications
are
still
challenging
this
field.
Herein,
we
rationally
design
a
processable
molecular
glass
employ
it
as
host
host-guest
strategy
to
address
these
challenges.
By
strategically
modifying
the
via
othyl-methylation,
successfully
create
capture
its
temperature-dependent,
viscous
supercooled
liquid
state.
High-efficiency
full
color
from
violet
near-infrared
with
ultralong
lifetimes
developed
by
doping
varied
structural
dopants.
The
underlying
glass-forming
mechanisms
also
clearly
elucidated
verified.
Moreover,
excellent
ability
of
enabled
system
large-area
fabrication,
shaping
objects
3D
structures,
creation
flexible,
meter-long
fibers.
This
work
offers
potential
practical
advanced
textiles,
displays,
other
fields.
