ChemPhotoChem,
Journal Year:
2022,
Volume and Issue:
7(2)
Published: Dec. 22, 2022
Abstract
The
syntheses,
structures,
and
circularly
polarized
luminescence
(CPL)
properties
of
bis(boron
difluoride)
complexes
with
chiral
Schiff‐base
ligands
are
described
herein.
A
series
based
on
the
naphthalene
backbone
were
prepared
by
reacting
BF
3
⋅OEt
2
corresponding
precursors,
molecular
structures
identified
NMR
spectroscopy
X‐ray
diffraction
(XRD)
analysis.
These
exhibited
efficient
photoluminescence
in
dilute
solution
high
emission
quantum
yields
(
Φ
)
up
to
0.99.
molecules
also
investigated.
Compared
solution,
KBr
dispersed
pellet
state
absolute
value
dissymmetry
factor
g
lum
was
significantly
increased
1.2×10
−2
.
photophysical
further
investigated
means
DFT
calculations.
JACS Au,
Journal Year:
2023,
Volume and Issue:
3(9), P. 2458 - 2466
Published: Aug. 21, 2023
Molecular
photoswitches
are
extensively
used
as
molecular
machines
because
of
the
small
structures,
simple
motions,
and
advantages
light
including
high
spatiotemporal
resolution.
Applications
depend
on
mechanical
responses,
in
other
words,
whether
they
can
generate
motions
against
forces
actuators
or
be
activated
controlled
by
mechanophores.
Sterically
hindered
stiff
stilbene
(HSS)
is
a
promising
photoswitch
offering
large
hinge-like
E/Z
isomerization,
thermal
stability
Z
isomer,
which
relatively
unstable
compared
to
E
with
half-life
ca.
1000
years
at
room
temperature,
near-quantitative
two-way
photoisomerization.
However,
its
response
entirely
unexplored.
Here,
we
elucidate
mechanochemical
reactivity
HSS
incorporating
one
isomer
into
center
polymer
chains,
ultrasonicating
solutions,
stretching
films
apply
elongational
embedded
HSS.
The
present
study
demonstrated
that
mechanically
isomerizes
only
direction
reversibly
combination
UV
light,
i.e.,
works
photomechanical
hinge.
photomechanically
inducible
but
thermally
irreversible
render
unique
promise
unconventional
applications
differently
from
existing
photoswitches,
mechanophores,
hinges.
Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
62(8)
Published: Dec. 30, 2022
It
is
essential
to
create
organic
compounds
that
exhibit
circularly
polarized
luminescence
(CPL)
in
the
near-infrared
(NIR)
range.
Helicene-type
emitters
possess
appealing
chiroptical
features,
however,
such
NIR
molecules
are
scarce
due
a
paucity
of
synthetic
strategies.
Herein,
we
developed
series
helical
β-isoindigo-based
B-O-B
bridged
aza-BODIPY
analogs
were
synthesized
conveniently.
The
reaction
diimino-β-isoindigo
with
heteroaromatic
amine
produced
restricted
ligand
cavity,
which
triggered
off
generation
bridge.
bridge
led
distorted
conformations
satisfy
requirements,
resulting
excellent
spectroscopic
and
properties.
Tunable
CPL
highest
dissymmetry
factor
(glum
)
1.3×10-3
brightness
(BCPL
=11.5
M-1
cm-1
region
was
achieved.
This
approach
expected
offer
new
opportunity
chiral
chemistry
increase
flexibility
for
tuning.
Journal of Materials Chemistry C,
Journal Year:
2023,
Volume and Issue:
11(7), P. 2574 - 2581
Published: Jan. 1, 2023
Multicolored
fluorescence,
high
Φ
PL
reaching
59%,
and
an
efficient
g
lum
up
to
0.01
with
the
brightness
for
circularly
polarized
luminescence
(125.2
M
−1
cm
),
were
achieved
in
axially
chiral
tetra-BF
2
complexes
by
substituent
engineering.
Dalton Transactions,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Multinuclear
group
13
complexes
adopting
axial
and
helical
chirality
exhibit
unique
structural
chiroptical
properties.
This
work
highlights
recent
advances
in
their
design,
synthesis,
photophysical
behaviors.
Advanced Optical Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 4, 2025
Abstract
Circularly
polarized
luminescence
(CPL)
materials
have
attracted
significant
attention
owing
to
their
unique
luminescent
properties
and
broad
range
of
applications.
However,
challenges
remain,
including
controlling
helical
assembly,
mitigating
aggregation‐caused
quenching,
balancing
quantum
yield
(
Φ
PL
)
with
g
values.
Here,
the
study
reports
synthesis
a
novel
asymmetric,
spiranic
O‐organoboranes
bearing
isoindolyl‐indolenine
scaffold
(BBI)
axial
chirality
through
BINOL
substitution,
as
well
its
supramolecular
assembly
surfactant‐regulated
tunable
CPL
behaviors.
The
newly
designed
BBI
dye
shows
relative
weak
10%
in
toluene.
Supramolecular
acetonitrile/water
co‐solvents
exhibit
an
obvious
aggregation‐induced
emission
(AIE)
process,
leading
formation
spherical
nanostructures
red‐shifted
orange‐yellow
(554
nm,
=
0.012,
7%).
Moreover,
surfactant
sodium
dodecyl
sulfonate
(SDS)
can
promote
aggregation
pure
deionized
water,
producing
nanofibers
blue‐shifted
yellow
(536
0.006,
13%).
Crystal
growth
toluene/hexane
SDS
aqueous/acetonitrile
systems
reveals
chiral
crystals
P
212121
space
group,
offering
insights
into
amplification.
This
demonstrates
ability
precisely
control
parameters,
X‐ray
single‐crystal
analysis
providing
additional
understanding
regulation.
Inorganic Chemistry,
Journal Year:
2022,
Volume and Issue:
61(42), P. 16718 - 16729
Published: Oct. 7, 2022
Tetracoordinated
organoboron
dyes
exhibiting
strong
fluorescence
in
either
solution
or
the
solid
state
are
currently
receiving
much
attraction
view
of
their
photovoltaic,
optoelectronic,
and
biological
applications.
Herein,
a
series
aromatic-ring-fused
BOPPY
have
been
developed
by
one-pot
condensation
formylated
isoindoles
indoles
pyridinylhydrazine
followed
subsequent
borylation
coordination.
The
facile
synthesis
provides
excellent
diversity
these
unsymmetrical
α-benzo-
β-benzothiophene-fused
with
intriguing
photophysical
properties
owing
to
rigid
planar
structure
extended
π-conjugation
while
containing
reactive
site.
They
display
intense
green
orange
red-to-near-infrared
emission
state,
high
quantum
yields
up
92
21%,
respectively,
relatively
large
Stokes
shifts,
photostability.
Furthermore,
two
representative
benzo-fused
probes
morpholine
benzenesulfonamide
groups
were
used
selectively
"light
up"
subcellular
organelles
such
as
lysosomes
endoplasmic
reticulum
under
ultralow
concentration,
respectively.
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
12(14)
Published: Jan. 19, 2024
Abstract
Advanced
organoboron
dyes,
incorporating
tetra‐boron
difluoride
(tetra‐BF
2
)
moieties,
are
developed,
demonstrating
efficient
electrochemiluminescence
(ECL)
emissions
in
the
green
to
orange
regions
through
direct
ion
annihilation.
By
introducing
diverse
alkyl
modifications
molecules,
luminescence
color
tuning
is
achieved
via
alterations
conjugation
and
bending
angle.
A
photoluminescence
quantum
yield
of
100%
dilute
solutions
successfully
achieved.
Notably,
introduction
groups
methine
side
stabilizes
radical
ionic
state,
resulting
a
high
ECL
efficiency
74%
an
radical‐ion
annihilation
pathway.
The
key
factor
that
energy
reaction
exceeds
S
1
required
for
luminescence.
Spin
density
calculations
further
elucidate
substituent
effects
on
ions
complexes.
Moreover,
lasing
properties
these
materials
solution‐processed
blend
films
investigated,
revealing
low
amplified
spontaneous
emission
(ASE)
threshold
(
E
th
6.40
±
0.24
µJ
cm
−2
,
which
notably
lower
among
organic
laser
materials.
This
attributed
their
large
Stokes
shifts
yield.
excellent
ASE
performances
establish
as
valuable
addition
existing
library
offering
fresh
insights
into
development
solid‐state
lasers.
Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
63(14), P. 6296 - 6304
Published: March 25, 2024
This
study
explored
the
development
of
functional
dyes
using
aluminum,
focusing
on
aluminum-based
dinuclear
triple-stranded
helicates,
and
examined
effects
substituent
variations
their
structural
optical
properties.
Key
findings
revealed
that
modification
methyl
groups
to
pyrrole
positions
significantly
extended
conjugation
system,
resulting
in
a
red
shift
absorption
emission
spectra.
Conversely,
at
methine
due
steric
hindrances
increased
torsion
angle
ligands,
leading
blue
A
common
feature
across
all
complexes
was
excited
state,
one
three
ligands
underwent
significant
relaxation.
led
pronounced
Stokes
minimal
spectra
overlap
with
high
photoluminescence
behaviors.
Moreover,
our
research
resolution
newly
synthesized
by
analyzing
chiroptical
properties
enantiomers,
including
circular
dichroism
circularly
polarized
luminescence.
These
insights
offer
valuable
contributions
design
application
novel
dyes,
potentially
influencing
range
fields,
from
materials
science
optoelectronics.