InfoMat,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 27, 2025
Abstract
Multiresonance
organoboron
helicenes
are
promising
narrowband
circularly
polarized
luminescence
(CPL)
emitters,
which,
however,
still
face
formidable
challenges
to
balance
a
large
dissymmetry
factor
(
g
lum
)
and
high
efficiency.
Here,
two
pairs
of
enantiomers
P/M
‐BN[8]H‐ICz
‐BN[8]H‐BO)
with
the
same
hetero[8]helicene
geometric
structures
developed
through
polycyclization
decoration.
We
find
that
it
is
helicity
helicene
electronic
rather
than
geometrical
one
determines
molecular
property
as
larger
could
enhance
electron‐orbital
coupling
structure.
Therefore,
‐BN[8]H‐BO
who
possesses
structure
realizes
nearly
one‐order‐of‐magnitude
higher
(+2.75/−2.52
×
10
−3
photoluminescence
quantum
yield
(PLQY)
99%
compared
bearing
only
hetero[6]helicene
distribution
+2.41/−2.37
−4
PLQY
95%).
Moreover,
BN[8]H‐BO
exhibits
green
emission
peaking
at
538
nm
full‐width
half‐maxima
merely
34
nm,
narrower
most
multiresonance
CPL
helicenes.
The
corresponding
organic
light‐emitting
diodes
simultaneously
realize
external
efficiency
31.7%,
an
electroluminescence
factors
EL
+5.23/−5.07
,
extremely
long
LT95
(time
95%
initial
luminance)
over
731
h
luminance
1000
cd
m
–
2
.
image
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(18)
Published: Feb. 21, 2024
The
intrinsic
helical
π-conjugated
skeleton
makes
helicenes
highly
promising
for
circularly
polarized
electroluminescence
(CPEL).
Generally,
carbon
undergo
low
external
quantum
efficiency
(EQE),
while
the
incorporation
of
a
multi-resonance
thermally
activated
delayed
fluorescence
(MR-TADF)
BN
structure
has
led
to
an
improvement.
However,
reported
B,N-embedded
all
show
dissymmetry
factors
(g
Chemical Science,
Journal Year:
2024,
Volume and Issue:
15(20), P. 7408 - 7440
Published: Jan. 1, 2024
Recent
advances
in
synthesis
have
opened
the
way
to
a
variety
of
boron
helicenes.
We
highlight
main
achievements
these
chiral
compounds
and
discuss
their
photophysical
properties
potential
as
functional
materials.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(32)
Published: May 13, 2024
Abstract
Circularly
polarized
luminescence
(CPL)
is
promising
for
applications
in
many
fields.
However,
most
systems
involving
CPL
are
within
the
visible
range;
near‐infrared
(NIR)
CPL‐active
materials,
especially
those
that
exhibit
high
g
lum
values
and
can
be
controlled
spatially
temporally,
rare.
Herein,
dynamic
NIR‐CPL
with
a
value
of
2.5×10
−2
was
achieved
through
supramolecular
coassembly
energy‐transfer
strategies.
The
chiral
assemblies
formed
by
between
adenosine
triphosphate
(ATP)
pyrene
derivative
exhibited
red
signal
(
10
−3
).
further
introduction
sulfo‐cyanine5
resulted
process,
which
not
only
led
to
NIR
but
also
increased
.
Temporal
control
these
realized
introducing
alkaline
phosphatase
fabricate
biomimetic
enzyme‐catalyzed
network,
allowing
turned
on.
Based
on
enzyme‐regulated
temporally
controllable
assemblies,
multilevel
information
encryption
system
developed.
This
study
provides
pioneering
example
construction
materials
ability
perform
temporal
via
assembly
strategy,
expected
aid
design
complex
more
closely
resemble
natural
biological
systems.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(36)
Published: June 20, 2024
The
strategy
of
integrating
conformational
isomerization
donors
and
chiral
acceptors
in
a
single
molecule
was
proposed
to
construct
white
circularly
polarized
luminescence
(WCPL)
materials
this
work.
Consequently,
pair
dual-emission
enantiomers,
namely
(R/S)-DO-PTZ,
were
designed
synthesized,
which
displayed
emission
with
blue
yellow
bands
solution
solid
films
Commission
Internationale
de
l'Eclairage
(CIE)
coordinates
(0.30,
0.33)
(0.33,
0.35),
respectively.
Meanwhile,
(R/S)-DO-PTZ
exhibited
high
PLQY
up
67
%
doped
clear
mirror-image
WCPL
signals
|g
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 15, 2024
Compared
with
the
classical
boron/nitrogen
(B/N)
doped
ones,
multiple-resonance
thermally
activated
delayed
fluorescence
(MR-TADF)
emitters
embedded
B-N
covalent
bond
behave
a
significantly
blue-shifted
narrowband
TADF,
and
thus
show
greater
potential
in
ultrapure
blue
organic
light-emitting
diodes
(OLEDs).
As
proof
of
concept,
herein
peripheral
substitution
engineering
is
demonstrated
based
on
such
B‒N
parent
core.
The
simple
approach
found
to
ensure
easy
synthesis
via
one-pot
lithium-free
borylation-annulation,
manipulate
excited
states
through
different
electronic
coupling
between
core
substituent,
introduce
steric
hindrance
minimize
unwanted
spectral
broadening.
Impressively,
OLEDs
are
realized
give
high
external
quantum
efficiency
20.3%
together
Commission
Internationale
de
l'Éclairage
coordinates
(0.152,
0.046).
performance
well
competent
those
B/N
MR-TADF
emitters,
clearly
highlighting
that
framework
novel
promising
paradigm
towards
efficient
BT.2020
standard.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(32), P. 22600 - 22611
Published: Aug. 5, 2024
Atomically
precise
synthesis
of
three-dimensional
boron-nitrogen
(BN)-based
helical
structures
constitutes
an
undeveloped
field
with
challenges
in
synthetic
chemistry.
Herein,
we
synthesized
and
comprehensively
characterized
a
new
class
molecular
carbons,
named
benzo-extended
[n]heli(aminoborane)s
(
Chemical Communications,
Journal Year:
2024,
Volume and Issue:
60(53), P. 6728 - 6740
Published: Jan. 1, 2024
This
review
overviews
recent
research
on
circularly
polarized
luminescence
from
planar
chiral
organic
compounds,
focusing
their
synthetic
strategies,
properties
and
applications.
