Advanced Optical Materials,
Год журнала:
2023,
Номер
11(10)
Опубликована: Март 22, 2023
Abstract
Herein,
two
kinds
of
amorphous
solid‐state
supramolecular
systems
with
purely
organic
room
temperature
phosphorescence
(RTP)
from
calix[3]phenothiazine
(
C[3]Pz
)
activated
by
1,2‐/1,3‐dicyanobenzene
1,2‐/1,3‐DCB
are
reported.
Different
macrocycle‐confined
guest
emission,
RTP
these
is
entirely
the
rivets
cavity
to
form
dense
complex
through
CH
…
π
interactions,
leading
different
emissions
at
566/524
nm
under
430
excitation,
respectively.
Although
shows
a
regular
arrangement
in
crystal,
vibration
dissipation
benzene
ring
results
emitting
only
fluorescence
508
temperature.
1,2‐DCB
and
1,3‐DCB
can
act
as
molecular
fix
inhibit
so
reduce
nonradiative
relaxation,
which
enables
achieve
effective
emission
20.8–36.8%
quantum
yields.
This
kind
guest‐activated
host
RTP,
fairly
rare
systems,
successfully
used
for
color
QR
codes
information
encryption.
Journal of the American Chemical Society,
Год журнала:
2023,
Номер
145(20), С. 11130 - 11139
Опубликована: Май 8, 2023
Room-temperature
phosphorescence
(RTP)
is
a
photophysical
phenomenon
typically
associated
with
long-lived
emission
that
can
be
detected
by
the
unaided
eye.
Several
natural
proteins
display
RTP,
as
do
certain
artificial
polymers.
In
both
cases,
RTP
ascribed
to
effective
intramolecular
through-space
electronic
communication.
However,
small
molecules
internal
communication
enable
are
relatively
rare.
Herein,
we
describe
an
alkyl
halide-responsive
system
consisting
of
meta-formylphenyl-bearing
pillar[5]arene
derivative
supports
charge
transfer
(TSCT)
within
pillararene
cavity.
Treatment
bromoethane,
heavy
atom-containing
guest
for
host,
serves
enhance
emission.
An
isomeric
para-formylphenyl-bearing
proved
ineffective
in
producing
effect.
Quantum
chemical
calculations
based
on
single-crystal
X-ray
diffraction
analyses
provided
insights
into
structural
determinants
governing
TSCT
between
1,4-dimethoxybenzene
donor
units
and
formylphenyl
groups
pillar[5]arene,
well
energy
gaps
intersystem
crossing
channels.
We
believe
present
mechanistic
analysis
provide
foundation
design
new
molecule
tunable
features.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(44)
Опубликована: Авг. 19, 2023
Abstract
The
stimulus‐responsive
room
temperature
phosphorescent
(RTP)
materials
have
endowed
wide
potential
applications.
In
this
work,
by
introducing
naphthalene
and
spiropyran
(SP)
into
polyacrylamide
as
the
energy
donor
acceptor
respectively,
a
new
kind
of
brilliant
dynamic
color‐tunable
amorphous
copolymers
were
prepared
with
good
stability
processibility,
afterglow
emissions
from
green
to
orange
in
response
stimulus
photo
or
acid,
thanks
multi‐responsibility
SP
transfer
between
SP.
addition
deeply
exploring
inherent
mechanism,
these
been
successfully
applied
dynamically
controllable
applications
information
protection
delivery.
Advanced Materials,
Год журнала:
2024,
Номер
36(37)
Опубликована: Фев. 9, 2024
Purely
organic
room-temperature
phosphorescence
(RTP)
materials
have
received
intense
attention
due
to
their
fascinating
optical
properties
and
advanced
optoelectronic
applications.
The
promotion
of
intersystem
crossing
(ISC)
minimalization
nonradiative
dissipation
under
ambient
conditions
are
key
prerequisites
for
realizing
high-performance
RTP;
However,
the
ISC
process
is
generally
inefficient
fluorogens
populated
triplet
excitons
always
too
susceptible
be
well
stabilized
by
conventional
means.
Particularly,
organizing
fluorophores
into
compact
ordered
entities
supramolecular
dynamic
interactions
has
proven
a
newly-emerged
strategy
boost
greatly
suppress
non-radiative
relaxations
immensely,
facilitating
population
stabilization
access
RTP.
Consequently,
well-defined
emitters
enable
robust
RTP
emission
even
in
solution
state,
thus
extending
Here,
this
review
focused
on
timely
brief
introduction
recent
progress
tailoring
interactions.
Their
typical
preparation
strategies,
properties,
applications
thoroughly
summarized.
In
summary
section,
challenges
perspectives
field
highlighted
suggest
potential
directions
future
study.
Abstract
Polyethylene
glycol
chains
in
two
terminals
of
the
naphthalene
functional
group
are
threaded
into
α‐cyclodextrin
cavities
to
form
pseudopolyrotaxane
(NPR),
which
not
only
effectively
induces
phosphorescence
by
cyclodextrin
macrocycle
confinement,
but
also
provides
interfacial
hydrogen
bonding
assembly
function
between
polyhydroxy
groups
and
waterborne
polyurethane
(WPU)
construct
elastomers.
The
introduction
NPR
endows
elastomer
with
enhanced
mechanical
properties
excellent
room
temperature
phosphorescent
(RTP)
emission
(phosphorescence
remains
water,
acid,
alkali,
organic
solvents,
even
at
160
°C
high
temperatures).
Especially,
reversible
mechanically
responsive
behavior
intensity
increased
three
times
under
200%
strain)
can
be
observed
stretch
recover
process,
owing
strain‐induced
microstructural
changes
further
inhibiting
non‐radiative
transition
vibration
NPR.
Therefore,
changing
supramolecular
elastomers
through
stretching
a
new
approach
for
luminescent
materials.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(10)
Опубликована: Янв. 8, 2024
Molecular
emitters
with
multi-emissive
properties
are
in
high
demand
numerous
fields,
while
these
basically
depend
on
specific
molecular
conformation
and
packing.
For
amorphous
systems,
special
arrangement
is
unnecessary,
but
it
remains
challenging
to
achieve
such
luminescent
behaviors.
Herein,
we
present
a
general
strategy
that
takes
advantage
of
rigidity
S
Chemical Science,
Год журнала:
2023,
Номер
14(44), С. 12548 - 12553
Опубликована: Янв. 1, 2023
A
wide-range
tunable
triplet
charge-transfer
(
3
CT)
phosphorescence
emission
is
achieved
by
an
intermolecular
through-space
cocrystallization
approach
using
pyromellitic
diimide
as
the
acceptor
and
different
donors.
