Angewandte Chemie,
Год журнала:
2024,
Номер
136(45)
Опубликована: Июль 8, 2024
Abstract
Acenes
are
attractive
as
building
blocks
for
low
gap
organic
materials
with
applications,
example,
in
light
emitting
diodes,
solar
cells,
bioimaging
and
diagnostics.
Previously,
we
have
shown
that
modification
of
dipyridylanthracene
via
B–N
Lewis
pair
fusion
(BDPA)
strongly
redshifts
the
emission,
while
facilitating
self‐sensitized
reactivity
toward
O
2
to
reversibly
generate
corresponding
endoperoxides.
Herein,
report
on
further
expansion
π‐system
BDPA
a
vinyl‐substituted
monomer,
vinylene‐bridged
dimer,
polymer
an
average
20
chromophores.
The
extension
π‐conjugation
results
largely
reduced
band
gaps
1.8
eV
dimer
1.7
polymer,
latter
giving
rise
NIR
emission
maximum
at
731
nm
appreciable
quantum
yield
7
%.
Electrochemical
computational
studies
reveal
efficient
delocalization
lowest
unoccupied
molecular
orbital
(LUMO)
along
pyridyl‐anthracene‐pyridyl
axis,
which
effective
electronic
communication
between
units,
selectively
lowers
LUMO,
ultimately
narrows
gap.
Time‐resolved
transient
absorption
(TA)
measurements
offer
insights
into
pertinent
photophysical
processes.
Extension
also
slows
down
formation
endoperoxides,
significantly
accelerating
thermal
release
singlet
oxygen
regenerate
parent
acenes.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(32), С. 22600 - 22611
Опубликована: Авг. 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
(
JACS Au,
Год журнала:
2025,
Номер
5(4), С. 1965 - 1973
Опубликована: Апрель 2, 2025
The
precise
construction
of
boron
stereogenic
centers
represents
a
significant,
yet
challenging
frontier
in
asymmetric
catalysis,
garnering
growing
attention
recent
years.
However,
feasible
catalysis
has
primarily
been
limited
to
transition-metal-catalyzed
desymmetrization
pro-chiral
BODIPY
molecules,
while
enantioselective
synthesis
via
organocatalysis
remains
unexplored.
Herein,
we
achieve
an
organocatalyzed
C-N
bond-forming
SNAr
reaction
3,5-dihalogen
BODIPYs
phase-transfer
enabling
the
efficient
broad
range
boron-stereogenic
with
excellent
enantioselectivities
(>40
examples,
up
99%
ee).
significance
and
potential
this
catalytic
approach
are
further
underscored
by
versatile
applications
enantioenriched
3-amide
synthesis,
optical
activity
regulation,
bioimaging,
sensing,
promoting
development
fluorophores.
Chemistry - A European Journal,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 19, 2024
Abstract
Boron‐doped
helicenes,
known
for
their
unique
electronic
and
photophysical
properties,
are
of
great
interest
numerous
applications.
This
research
introduces
two
new
azabora[6]helicenes,
H[6]BN1
H[6]BN2
,
synthesized
through
an
efficient
method.
These
molecules
have
boron
nitrogen
atoms
in
opposing
positions,
enhancing
distinctive
attributes.
Both
helicenes
show
excellent
emission
with
exhibiting
narrowband
blue
fluorescence
circularly
polarized
luminescence
(CPL),
achieving
g
lum
values
4~5×10
−4
which
is
beneficial
chiroptical
The
addition
a
donor
group,
3,
6‐di‐tert‐butyl‐9H‐carbazole,
improves
luminescence,
likely
due
to
enhanced
molecular
orbital
overlap
electron
delocalization.
′s
needle‐like
single
crystals
exhibit
mechanochromism,
changing
luminescent
color
from
yellow
green
under
mechanical
stress,
promising
stimulus‐responsive
materials.
In
conclusion,
this
study
presents
novel
class
BN[6]helicenes
superior
properties.
Their
combination
features
mechanochromism
makes
them
ideal
advanced
materials,
expanding
the
potential
helicene‐based
compounds
offering
directions
synthesis
specific
characteristics.
Organic Chemistry Frontiers,
Год журнала:
2024,
Номер
11(19), С. 5638 - 5669
Опубликована: Янв. 1, 2024
This
review
covers
recent
advances
in
post-functionalization
of
twistacenes
to
realize
polyacenes,
chiral
nanographenes
and
their
semiconductor
properties,
emphasizing
a
promising
future
for
constructing
nanotubes.
Chemical Communications,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 18, 2024
During
the
process
of
developing
smart
chiroptical
luminophores,
BODIPYs
have
emerged
as
candidates
utmost
importance.
Here
in
we
will
discuss
their
synthesis.
ABSTRACT
Urogenital
system
tumors
include
prostate
cancer,
bladder
ovarian
and
other
very
common
solid
tumor
diseases
with
high
morbidity
mortality.
The
unique
physiological
anatomical
features
of
the
urogenital
render
it
particularly
amenable
to
application
tissue
imaging
techniques
for
diagnostic
purposes.
advancement
aggregation‐induced
emission
(AIE)
materials
has
addressed
limitations
associated
conventional
fluorescent
that
are
prone
aggregation‐caused
quenching.
This
facilitated
development
innovative
AIE
characterized
by
enhanced
photostability,
an
increased
signal‐to‐noise
ratio,
improved
quality.
article
reviews
research
progress
biosensors
in
diagnosis
tumors.
It
mainly
involves
biomarker
vitro
fluorescence
such
as
uterine
which
based
on
biosensors.
In
addition,
a
comprehensive
description
biosensors’
synthesis
strategies
is
provided.
includes
detailed
elucidation
platforms
intracellular
mechanisms
basic
principles
AIE,
accompanied
presentation
quantitative
analysis
cell
results.
limitations,
challenges
suggestions
field
summarized,
prospect
prospected.
tumors,
also
provides
catalyst
exploring
characteristics
its
wide
disease
diagnosis.
We
here
disclose
synthesis
and
properties
of
a
series
BN-heterocycle-fused
[6]helicenes.
The
fusion
the
BN-heterocycle
is
helpful
to
extend
π-conjugation
increase
absorptivity
fluorescence
efficiency
first
excited
state.
Especially,
double
[6]helicene
BiBN-BiHC
shows
outstanding
circularly
polarized
luminescence
performance
with
BCPL
up
49.0
M–1
cm–1,
owing
its
very
high
ΦF
(0.87),
large
ε
(5.47
×
104
cm–1),
fairly
good
|glum|
(2.06
10–3).
Dalton Transactions,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 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.
