Advanced Optical Materials,
Год журнала:
2023,
Номер
11(8)
Опубликована: Фев. 16, 2023
Abstract
Chiroptical
materials
capable
of
emitting
circularly
polarized
luminescence
(CPL)
have
been
gaining
intensive
interest
for
their
wide
applications
in
fields
materials.
In
this
work,
a
locally
rotated
molecular
tiara
Py
5
P5
,
which
five
bulky
pyrene
units
locate
at
one
rim
and
small
methoxy
groups
the
other,
is
designed.
The
planar
chiral
skeleton
can
make
being
ordered
asymmetrical
manner
to
arise
CPL
emission
from
excimer,
other
ensure
interconversion
between
p
R‐
S‐conformers
freely
via
local
rotation.
Thus,
both
left‐handed
right‐handed
may
emit
stacked
order
with
high
|
g
lum
up
1.28
×
10
−3
under
induction
amino
acid
derivatives.
It
first
observation
that
excimer
be
arisen
single
molecule
by
adding
simple
guests.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Фев. 16, 2024
Abstract
Developing
a
facile
and
feasible
strategy
to
fabricate
thermally
activated
delayed
fluorescence
materials
exhibiting
full-color
tunability
remains
an
appealing
yet
challenging
task.
In
this
work,
general
supramolecular
for
fabricating
is
proposed.
Consequently,
series
of
host–guest
cocrystals
are
prepared
by
electron-donating
calix[3]acridan
various
electron-withdrawing
guests.
Owing
the
through-space
charge
transfer
mediated
multiple
noncovalent
interactions,
these
all
display
efficient
fluorescence.
Especially,
delicately
modulating
ability
guest
molecules,
emission
colors
can
be
continuously
tuned
from
blue
(440
nm)
red
(610
nm).
Meanwhile,
high
photoluminescence
quantum
yields
up
87%
achieved.
This
research
not
only
provides
alternative
fabrication
materials,
but
also
establishes
reliable
protocol
toward
design
advanced
luminescent
materials.
Journal of the American Chemical Society,
Год журнала:
2023,
Номер
145(16), С. 9011 - 9020
Опубликована: Апрель 13, 2023
Polycatenanes
are
extremely
attractive
topological
architectures
on
account
of
their
high
degrees
conformational
freedom
and
multiple
motion
patterns
the
mechanically
interlocked
macrocycles.
However,
exploitation
these
peculiar
structural
dynamic
characteristics
to
develop
robust
catenane
materials
is
still
a
challenging
goal.
Herein,
we
synthesize
an
oligo[2]catenane
that
showcases
properties
at
both
microscopic
macroscopic
scales.
The
key
feature
design
controlling
force-bearing
points
metal-coordinated
core
[2]catenane
moiety
able
maximize
energy
dissipation
via
dissociation
metal-coordination
bonds
then
activation
sequential
intramolecular
motions
circumrotation,
translation,
elongation
under
external
force.
As
such,
level,
single-molecule
force
spectroscopy
measurement
exhibits
rupture
in
reaches
record
588
±
233
pN.
At
our
manifests
itself
as
toughest
material
ever
reported
(15.2
vs
2.43
MJ/m3).
These
fundamental
findings
not
only
deepen
understanding
structure-property
relationship
poly[2]catenanes
with
full
set
features
but
also
provide
guiding
principle
fabricate
high-performance
materials.
Materials Chemistry Frontiers,
Год журнала:
2023,
Номер
7(18), С. 3879 - 3903
Опубликована: Янв. 1, 2023
The
research
progress
of
macrocyclic
CPL
systems
has
been
reviewed
based
on
individual
chiral
macrocycles,
host–guest
complexation,
and
in
particular
their
self-assembly
systems.
Chemical Science,
Год журнала:
2023,
Номер
14(16), С. 4426 - 4433
Опубликована: Янв. 1, 2023
We
report
herein
two
lemniscular
carbon
nanohoops
bis-po-CC
and
bis-pm-TC
with
contiguous
conjugation
from
planar
chiral
[2.2]paracyclophane,
elucidate
the
influence
of
regioselective
synthesis
on
their
topological
chirality.
Chemical Communications,
Год журнала:
2023,
Номер
59(88), С. 13089 - 13106
Опубликована: Янв. 1, 2023
This
review
comprehensively
summarizes
circularly
polarized
luminescence
materials
from
chiral
macrocycles,
especially
macrocyclic
hosts
and
their
derivatives.
Chem,
Год журнала:
2023,
Номер
9(5), С. 1195 - 1207
Опубликована: Фев. 15, 2023
Summary
Active
template
auxiliary
methodologies
have
previously
been
developed
for
the
stereoselective
synthesis
of
chiral
interlocked
molecules
in
which
mechanical
bond
provides
sole
stereogenic
unit.
To
date,
however,
covalent
has
included
half-axle
components
(rotaxanes)
or
pre-macrocycle
(catenanes),
and
thus
mechanically
rotaxane
catenane
syntheses
rely
on
different
components.
Here,
we
present
a
single,
simple
amino-acid-derived
macrocycle
that
mediates
formation
both
catenanes
rotaxanes
excellent
stereoselectivity.
We
demonstrate
flexibility
our
approach
through
all
three
isomers
co-conformationally
planar
[3]rotaxane.
Chemistry - A European Journal,
Год журнала:
2024,
Номер
30(32)
Опубликована: Апрель 3, 2024
Abstract
D
2
‐symmetric
(
R
)‐binaphthyl‐bridged
pyrenophanes
containing
thioether
bonds
were
synthesized.
The
exhibited
the
temperature‐induced
sign
inversion
of
circularly
polarized
luminescence
(CPL)
while
maintaining
emission
wavelength
and
reversibility.
Δ
g
lum
value
reached
0.02,
FL
quenching
by
heat
was
negligible.
CPL
originates
from
intramolecular
excimer
chirality
associated
with
excitation
dynamics.
two
pyrenes
form
a
kinetically
trapped
left‐handed
twist
at
low
temperatures,
they
thermodynamically
favored
right‐handed
high
temperatures.
linkers
can
impart
flexibility
suitable
for
excimers.
Chemical Society Reviews,
Год журнала:
2024,
Номер
53(11), С. 5677 - 5703
Опубликована: Янв. 1, 2024
Catenanes
have
captured
the
imagination
of
chemists
with
their
intriguing
features.
In
this
review,
we
overviewed
different
approaches
developed
for
synthesis
catenanes,
ranging
from
early
statistical
methods
to
state-of-the-art
template-directed
syntheses.
