ACS Materials Letters,
Год журнала:
2024,
Номер
6(8), С. 3487 - 3495
Опубликована: Июль 5, 2024
Nonaromatic
phosphorescence
has
burgeoned
into
a
new
frontier
of
luminescent
materials.
Herein,
nonaromatic
chiral
lysine
amphiphiles
with
long
alkyl
chains
connected
via
urea
or
amide
bonds
are
designed,
and
their
self-assembly
as
well
chiroptical
properties
investigated.
The
C18
derivative
bond
self-assembles
nanotube
shows
an
excitation-dependent
(ExD)
circularly
polarized
(CPP).
Under
varied
excitations,
the
CPP
can
be
tuned
from
violet
to
blue,
lifetime
up
32.0
ms,
quantum
yield
63.0%,
dissymmetry
factor
5.4
×
10–3.
In
comparison,
bonded
microfiber
showing
conventional
CPP.
It
is
suggested
that
multiple
noncovalent
clustering
amphiphilic
molecules
responsible
for
Moreover,
when
fluorescent
dyes
doped,
luminescence
longer
obtained.
work
demonstrates
self-assembled
gel
materials
show
ExD-CPP,
which
opens
scope
Chemical Reviews,
Год журнала:
2024,
Номер
124(4), С. 1950 - 1991
Опубликована: Фев. 16, 2024
Since
the
initial
landmark
study
on
chiral
induced
spin
selectivity
(CISS)
effect
in
1999,
considerable
experimental
and
theoretical
efforts
have
been
made
to
understand
physical
underpinnings
mechanistic
features
of
this
interesting
phenomenon.
As
first
formulated,
CISS
refers
innate
ability
materials
act
as
filters
for
electron
transport;
however,
more
recent
experiments
demonstrate
that
displacement
currents
arising
from
charge
polarization
molecules
lead
without
need
net
flow.
With
its
identification
a
fundamental
connection
between
symmetry
materials,
promises
profound
ubiquitous
implications
existing
technologies
new
approaches
answering
age
old
questions,
such
homochiral
nature
life.
This
review
begins
with
discussion
different
methods
measuring
then
provides
comprehensive
overview
known
exhibit
CISS-based
phenomena
before
proceeding
identify
structure-property
relations
delineate
leading
models
effect.
Next,
it
identifies
some
physics,
chemistry,
biology.
The
ends
critical
assessment
field
comments
future
outlook.
Chemical Society Reviews,
Год журнала:
2023,
Номер
52(13), С. 4443 - 4487
Опубликована: Янв. 1, 2023
Supramolecular
chirality
inversion
is
closely
related
to
biological
and
chemical
self-assembly
systems.
This
review
highlights
the
fundamental
principles,
various
strategies,
promising
applications
of
supramolecular
inversion.
Chemical Society Reviews,
Год журнала:
2023,
Номер
52(21), С. 7524 - 7548
Опубликована: Янв. 1, 2023
Within
the
field
of
supramolecular
polymers,
chiral
polymers
are
an
excellent
benchmark
to
generate
helical
structures
that
can
clarify
origin
homochirality
in
Nature
or
find
out
new
exciting
functionalities
organic
materials.
Chirality,
Год журнала:
2023,
Номер
35(4), С. 192 - 210
Опубликована: Янв. 27, 2023
Abstract
Helicenes
are
an
interesting
scaffold
for
chiroptical
properties
and
in
particular
circularly
polarized
luminescence
(CPL).
In
this
short
review,
we
collect
the
(g
lum
)
absorption
abs
dissymmetry
factors
associated
to
first
Cotton
effect
of
electronic
circular
dichroism
(ECD)
spectrum.
Considering
data
170
[n]‐helicenes
(
n
=
4–11),
overall
found
reasonable
correlations
between
g
.
Despite
a
few
notable
exceptions,
would
confirm
similarity
stereochemistry
ground
emitting
excited
states
most
helicenes.
These
results
may
be
useful
rationalizing
help
chemists
designing
new
helicene
structures
with
desired
CPL
properties.
Advanced Materials,
Год журнала:
2023,
Номер
35(28)
Опубликована: Май 12, 2023
Molecular
spins
are
promising
building
blocks
of
future
quantum
technologies
thanks
to
the
unparalleled
flexibility
provided
by
chemistry,
which
allows
design
complex
structures
targeted
for
specific
applications.
However,
their
weak
interaction
with
external
stimuli
makes
it
difficult
access
state
at
single-molecule
level,
a
fundamental
tool
use,
example,
in
computing
and
sensing.
Here,
an
innovative
solution
exploiting
interplay
between
chirality
magnetism
using
chirality-induced
spin
selectivity
effect
on
electron
transfer
processes
is
foreseen.
It
envisioned
use
spin-to-charge
conversion
mechanism
that
can
be
realized
connecting
molecular
qubit
dyad
where
donor
acceptor
linked
chiral
bridge.
By
numerical
simulations
based
realistic
parameters,
shown
could
enable
initialization,
manipulation,
single-spin
readout
qubits
qudits
even
relatively
high
temperatures.
Journal of the American Chemical Society,
Год журнала:
2023,
Номер
145(21), С. 11599 - 11610
Опубликована: Май 2, 2023
Helical
bilayer
nanographenes
(HBNGs)
are
chiral
π-extended
aromatic
compounds
consisting
of
two
π-π
stacked
hexabenzocoronenes
(HBCs)
joined
by
a
helicene,
thus
resembling
van
der
Waals
layered
2D
materials.
Herein,
we
compare
[9]HBNG,
[10]HBNG,
and
[11]HBNG
helical
bilayers
endowed
with
[9],
[10],
[11]helicenes
embedded
in
their
structure,
respectively.
Interestingly,
the
helicene
length
defines
overlapping
degree
between
HBCs
(number
benzene
rings
involved
interactions
layers),
being
26,
14,
10
rings,
respectively,
according
to
X-ray
analysis.
Unexpectedly,
electrochemical
study
shows
that
lesser
system
[9]HBNG
strongest
electron
donor
character,
part
interlayer
exchange
resonance,
more
red-shifted
values
emission.
Furthermore,
also
exceptional
chiroptical
properties
biggest
gabs
glum
(3.6
×
10-2)
when
compared
[10]HBNG
owing
fine
alignment
configuration
its
electric
magnetic
dipole
transition
moments.
spectroelectrochemical
studies
as
well
fluorescence
spectroscopy
support
aforementioned
experimental
findings,
confirming
strong
impact
on
this
new
family
nanographenes.
Journal of the American Chemical Society,
Год журнала:
2023,
Номер
145(18), С. 10092 - 10103
Опубликована: Апрель 26, 2023
Highly
emissive
π-conjugated
macrocycles
with
tunable
circularly
polarized
luminescence
(CPL)
have
sparked
theoretical
and
synthetic
interests
in
recent
years.
Herein,
we
report
a
approach
to
obtain
new
chiral
organoborane
(CMC1,
CMC2,
CMC3)
that
are
built
on
the
structurally
[5]helicenes
highly
luminescent
triarylborane/amine
moieties
embedded
into
cyclic
systems.
These
rarely
accessible
B/N-doped
main-group
show
unique
topology
dependence
of
optoelectronic
chiroptical
properties.
CMC1
CMC2
higher
dissymmetry
factor
(glum)
together
an
enhanced
CPL
brightness
(BCPL)
as
compared
CMC3.
Electronic
effects
were
also
tuned
resulted
bathochromic
shifts
their
emission
responses
from
blue
for
near-infrared
(NIR)
region
Furthermore,
chemical
oxidations
N
donor
sites
gave
rise
stable
radical
cation
(CMC1·+SbF6–)
diradical
dication
species
(CMC12·2+2SbF6–)
serve
rare
example
positively
charged
open-shell
macrocycle.
Journal of the American Chemical Society,
Год журнала:
2023,
Номер
145(49), С. 26791 - 26798
Опубликована: Ноя. 16, 2023
Knot-like
structures
were
found
to
have
interesting
magnetic
properties
in
condensed
matter
physics.
Herein,
we
report
on
topologically
chiral
molecular
knots
as
efficient
spintronic
material.
The
discovery
of
the
chiral-induced
spin
selectivity
(CISS)
effect
opens
possibility
manipulating
orientation
with
soft
materials
at
room
temperature
and
eliminating
need
for
a
ferromagnetic
electrode.
In
trefoil
knot,
there
are
no
stereogenic
carbon
atoms,
chirality
results
from
spatial
arrangements
crossings
knot
structures.
molecules
show
very
high
polarization
nearly
90%,
conductivity
that
is
higher
by
about
2
orders
magnitude
compared
other
small
molecules,
enhanced
thermal
stability.
A
plausible
explanation
these
special
provided,
combined
model
calculations,
supports
role
electron-electron
interaction
systems.
