Advanced Optical Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 25, 2024
Abstract
Negative
dichroic
dyes
are
crucial
for
enhancing
the
brightness
of
liquid
crystal
displays
(LCDs)
and
modulating
circularly
polarized
luminescence
(CPL)
in
cholesteric
crystals
(CLCs)
through
supramolecular
co‐assembly.
However,
majority
fluorescent
molecules
exhibit
positive
dichroism,
there
is
a
limited
understanding
designing
negative
molecules.
In
this
paper,
novel
design
principle
proposed
to
construct
polymer
by
introducing
space
charge
transfer
(TSCT)
side
chain
structure
backbone.
Specifically,
two
conjugated
polymers
(P1,
P2)
synthesized
using
Suzuki
coupling
reaction
donor‐acceptor
(D‐A)
type
monomers
(V‐type
M1
I‐type
M2)
with
fluorenyl
monomer.
P1
exhibits
its
orientational
order
parameter
(S
F
)
up
S
FP1
=
–0.18.
On
contrary,
P2
dichroism
(
FP2
+
0.27).
This
variation
arises
from
differing
orientations
rigidly
functional
chains
FM1
0.07;
FM2
0.31),
which
affect
alignment
(parallel
or
perpendicular)
backbone
toward
CLCs
phenomenon
facilitates
controllable
precisely
modulates
handedness
CPL
signals,
thereby
facilitating
successful
implementation
multidimensional
information
encryption
systems
CLCs.
Scientia Sinica Chimica,
Год журнала:
2024,
Номер
54(8), С. 1233 - 1249
Опубликована: Май 27, 2024
Circularly
polarized
luminescent
(CPL)
materials
have
attracted
widespread
attention
due
to
their
potential
applications
in
various
fields
such
as
3D
display,
photoelectric
devices,
chiral
sensors,
and
asymmetric
synthesis.Constructing
high-performance
CPL
with
tunable
handedness
direction
is
essential
for
fulfilling
the
practical
application
demands
diverse
domains.This
review
summarizes
research
progress
on
achieving
chirality
inversion
of
through
stimuli,
including
light,
temperature,
solvent,
pH
ions.It
further
briefly
discusses
inversion,
well
remaining
challenges
future
trends
this
area.
