The Effect of Regioisomerism on the TADF Properties of Organic Dyes
Tim Silies,
Silvia Tombolato,
Debbie Stappers
и другие.
ChemistryEurope,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 3, 2025
Abstract
The
properties
of
thermally
activated
delayed
fluorescence
(TADF)
chromophores
are
highly
dependent
on
the
molecular
design.
choice
donor
(D)
and
acceptor
(A)
group
as
important
π
‐linker
substitution
positions.
Herein,
influence
regioisomerism
through
pattern
9,9’‐spirobi[fluorene]
(SBF)
TADF
characteristics
is
investigated.
In
our
studies,
phenothiazine
carbonitrile
have
been
chosen
D
A
groups,
their
varied
among
2,
2’,
7
7’
positions
spiro
core
resulting
in
two
pairs
regioisomers.
Depending
these
changes,
physical
differ
from
one
to
another
with
changes
emission
wavelength
maximum,
photoluminescence
quantum
yield
(PLQY),
lifetime
thermal
stability.
Three
investigated
molecules
exhibit
solid
phase
thin
films
crystals.
Язык: Английский
Visible‐Light‐Driven Multifunctional Luminogens With More Than 150 Nm Absorption Band Separation for Dynamic Information Encryption
Aggregate,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 16, 2025
ABSTRACT
Information
security
protection
has
become
a
fundamental
issue
in
the
human
life,
national
security,
and
social
stability,
which
is
enabled
through
use
of
multi‐responsive
materials.
Ideal
materials
are
operated
with
visible
to
near
infrared
light,
exhibit
large
separation
absorption
bands,
functional
by
isomerization,
posing
an
unmet
challenge.
Here,
series
visible‐light‐operated
molecular
photoswitches,
(
E
)‐1‐acetyl‐2‐((4‐(diphenylamino)
phenyl)
imino)
indolin‐3‐one,
its
derivatives
PIO‐01/02/03/04/05
),
featuring
near‐infrared
second
aggregation‐induced
emission
(AIE)
impressive
acid/base‐driven
switching,
constructed
via
twisted
intramolecular
charge
transfer
(TICT)
subsequent
/
Z
isomerization
strategies.
In
addition,
protonation
not
only
endows
these
molecules
(Δ
λ
max
)
over
100
nm,
but
also
can
be
used
as
independent
input
altering
light
response.
Based
on
calculation
studies
advanced
spectroscopic
techniques,
we
provide
intricate
interplay
switching
behavior
their
photochemical
properties.
The
optimized
compound
PIO‐01
shows
significant
applications
multi‐color,
multi‐patterning
display,
transient
information
recording
erasing,
dual‐mode
encryption‐decryption
ternary
code.
Язык: Английский
Multiple stimuli-responsive dual-emission material with locked diverse conformations for multimodal anti-counterfeiting and single-molecule white electroluminescence
BoHua Zhang,
Siqi Liu,
JiangXue Pei
и другие.
Chemical Engineering Journal,
Год журнала:
2025,
Номер
unknown, С. 162788 - 162788
Опубликована: Апрель 1, 2025
Язык: Английский
Day‐Long Organic Persistent Luminescence in Flexible Polymeric Materials
Angewandte Chemie,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 26, 2025
Abstract
The
progress
in
organic
afterglow
materials
has
drawn
significant
attention
due
to
their
extensive
applications
fields
such
as
optoelectronics,
anti‐counterfeiting,
and
bioimaging.
Nonetheless,
a
general
limitation
of
is
short
emission
lifetimes,
typically
spanning
from
milliseconds
seconds,
which
creates
substantial
challenge
developing
day‐long
(DOA).
In
this
study,
DOA
system
demonstrated
through
the
incorporation
electron
donor/acceptor
exciplexes.
Polyethylene
naphthalate
used
for
both
acceptor
charge
storage
units,
coupling
with
spirobifluorene‐carbazole
derivative
donor,
providing
effective
separations
under
UV‐light
sunlight
excitation.
resulting
polymers
demonstrate
an
exceptional
bluish‐green
that
endures
over
28
h
ambient
conditions,
setting
new
record
longest
duration
polymeric
materials.
Moreover,
DOA‐doped
polymers,
films
fibers,
exhibit
outstanding
flexibility
transparency,
making
them
highly
suitable
flexible
technologies
wearable
devices.
Язык: Английский
Day‐Long Organic Persistent Luminescence in Flexible Polymeric Materials
Angewandte Chemie International Edition,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 26, 2025
Abstract
The
progress
in
organic
afterglow
materials
has
drawn
significant
attention
due
to
their
extensive
applications
fields
such
as
optoelectronics,
anti‐counterfeiting,
and
bioimaging.
Nonetheless,
a
general
limitation
of
is
short
emission
lifetimes,
typically
spanning
from
milliseconds
seconds,
which
creates
substantial
challenge
developing
day‐long
(DOA).
In
this
study,
DOA
system
demonstrated
through
the
incorporation
electron
donor/acceptor
exciplexes.
Polyethylene
naphthalate
used
for
both
acceptor
charge
storage
units,
coupling
with
spirobifluorene‐carbazole
derivative
donor,
providing
effective
separations
under
UV‐light
sunlight
excitation.
resulting
polymers
demonstrate
an
exceptional
bluish‐green
that
endures
over
28
h
ambient
conditions,
setting
new
record
longest
duration
polymeric
materials.
Moreover,
DOA‐doped
polymers,
films
fibers,
exhibit
outstanding
flexibility
transparency,
making
them
highly
suitable
flexible
technologies
wearable
devices.
Язык: Английский