ACS Nanoscience Au,
Год журнала:
2024,
Номер
4(6), С. 435 - 442
Опубликована: Окт. 21, 2024
The
dynamic
control
of
chiral
(enantiomeric)
responses
in
host–guest
complexes
through
external
stimuli
is
a
significant
challenge
modern
chemistry
for
developing
smart
stimuli-responsive
materials.
Herein,
we
report
the
(chir)optical
properties
and
recognition
behavior
water-soluble
naphthotubes
(1)
under
influence
hydrostatic
pressure
as
an
stimulus.
spectral
profiles
compared
to
those
obtained
at
normal
revealed
1
pressure,
owing
flexible
linker.
In
experiments,
hydrophilic
amino
acids
such
phenylalanine
(Phe)
tryptophan
(Trp)
exhibited
reaction
volume
changes
(ΔV°)
−0.9
cm3
mol–1
d-Phe,
−1.2
l-Phe,
−5.6
d-Trp,
−7.0
l-Trp,
with
enantioselectivity
ranging
from
1.2
1.6.
contrast,
hydrophobic
styrene
oxide
(2)
showed
ΔV°
values
1.5
R-2
3.5
S-2,
relatively
higher
up
7.6.
These
contrasting
effects
primarily
originate
dynamics
naphthotubes.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(24), С. 16729 - 16736
Опубликована: Июнь 5, 2024
Chiral
atomically
precise
metal
clusters,
known
for
their
remarkable
chiroptical
properties,
hold
great
potential
applications
in
chirality
recognition.
However,
advancements
this
field
have
been
constrained
by
the
limited
exploration
of
host–guest
chemistry,
involving
clusters.
This
study
reports
synthesis
a
chiral
Cu16(C2B10H10S2)8
(denoted
as
Cu16@CB8,
where
C2B10H12S2H2
=
9,12-(HS)2-1,2-closo-carborane)
cluster
an
achiral
carboranylthiolate
ligand.
The
R-/S-Cu16@CB8
features
cavities
reminiscent
cyclodextrins,
which
are
surrounded
carborane
yet
they
crystallize
racemate.
These
cyclodextrin-like
demonstrated
specific
recognition
amino
acids,
indicated
responsive
output
circular
dichroism
and
circularly
polarized
luminescence
signals
Cu16
moieties
Cu16@CB8
cluster.
Notably,
quantitative
analysis
acids
short
time
concomitant
deracemization
were
achieved.
Density
functional
tight-binding
molecular
dynamics
simulation
noncovalent
interaction
further
unraveled
importance
binding
sites
Dipeptide,
tripeptide,
polypeptide
containing
corresponding
(Cys,
Arg,
or
His
residues)
display
same
recognition,
showing
generality
approach.
synergy
dual
comprising
is
first
cluster,
resulting
valuable
quantification
enantiomeric
excess
(ee)
value
acids.
work
opens
new
avenue
sensors
based
on
clusters
with
unique
properties
inspires
development
chemistry.
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 17, 2025
Abstract
Preparing
multi‐color
and
multi‐stimuli‐responsive
circularly
polarized
luminescence
(CPL)
materials
understanding
the
evolution
of
chirality
through
visualized
mode
is
still
a
challenge.
Here,
an
encapsulation
engineering
approach
chiral
metal‐organic
frameworks
(MOFs)
proposed
to
confine
guest
emitters
realize
CPL.
Based
on
triplet‐triplet
energy
transfer
(TTET),
white
CPL
near‐infrared
room
temperature
phosphorescence
(NIR‐CPRTP)
can
be
obtained
by
introducing
pyrene
derivatives.
With
introduction
containing
vinylpyrene
group,
light‐
thermal‐responsive
with
signal
inversion
realized
reversible
[2+2]
cycloaddition
reaction
between
ligand
triggered
visible
light/ultraviolet
light
or
heating.
Furthermore,
excitation‐dependent
successfully
achieved
incorporation
excited
state
intramolecular
proton
(ESIPT)
molecules
into
nanopores.
Importantly,
magnification
greatly
enhanced
spatial
confinement,
accurate
host‐guest
single
crystal
structures
FLT@DCF‐12
FLT@LCF‐12
provide
understand
mechanism
transfer,
amplification
responsiveness.
White
LED
multiple
information
display
encryption
are
further
demonstrated.
This
breakthrough
provides
new
perspective
guest‐encapsulated
MOFs
contributes
construction
stimuli‐responsive
CPL‐active
materials.
Macromolecular Chemistry and Physics,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 14, 2025
Abstract
Circularly
polarized
luminescence
(CPL)
materials
have
garnered
considerable
attention
for
applications
in
optical
data
storage,
anti‐counterfeiting,
and
photonic
devices.
However,
precisely
controlling
over
chirality
emissive
properties
of
chiral
luminescent
polymers
remains
challenging.
Herein,
this
work
presents
a
series
polyether‐based
liquid
crystalline
copolymers
(LCPs),
denoted
Cy
x
Ch
y
,
synthesized
via
organocatalyzed
ring‐opening
copolymerization
epoxides
bearing
cyanostilbene
(Cy)
cholesterol
(Ch)
units.
The
resulting
exhibit
controlled
molar
masses,
narrow
distributions,
excellent
thermal
stability.
crystal
phase
transitions
tunable
behavior
dependent
on
content,
progressing
sequentially
from
nematic
4
1
3
2
to
smectic
ultimately
.
Notably,
efficient
π–π
interactions
moieties
confer
pronounced
photoluminescence,
with
emission
shifting
shorter
wavelengths
as
the
proportion
decreases.
Simultaneously,
segments
introduce
strong
CPL
signals,
achieving
|glum|
values
up
0.28
specific
compositions.
Remarkably,
signal
inversion
is
observed
at
4:1
Cy:Ch
ratio
due
selective
Bragg
reflection
within
self‐assembled
copolymer
matrix.
These
results
demonstrate
versatile
pathway
advanced
LCPs
robust
activity,
heralding
new
opportunities
high‐performance
optoelectronic
technologies.
Chemical Communications,
Год журнала:
2024,
Номер
60(74), С. 10212 - 10215
Опубликована: Янв. 1, 2024
Chiral
metal–organic
frameworks
DCF-20
and
LCF-20
were
utilized
as
matrices
for
both
chirality
transfer
energy
transfer.
The
excitation-dependent
full-color
circularly
polarized
luminescence
can
be
obtained.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Окт. 23, 2024
Achieving
precise
and
controllable
hierarchical
self-assembly
of
functional
nanoclusters
within
crystal
lattices
to
create
distinct
architectures
is
immense
significance,
yet
it
creates
considerable
challenges.
Here
we
successfully
synthesized
a
silver
nanowheel
Ag
Abstract
A
facile
and
general
strategy
is
developed
herein
for
the
construction
of
circularly
polarized
luminescence
(CPL)
materials
with
simultaneously
high
fluorescence
quantum
efficiency
(Φ)
large
dissymmetry
factor
(g
lum
).
The
self‐assembly
fluorescent
dye,
disodium
4,4′‐bis(2‐sulfonatostyryl)biphenyl
(CBS),
chiral
diamines
such
as
(R,R)/(S,S)‐1,2‐diaminocyclohexane
(R/S‐DACH)
R/S‐1,2‐diaminopropane
(R/S‐DAP),
produces
four
crystalline
organic
salt
networks
(COSNs).
These
as‐synthesized
salts
emit
strong
blue‐color
CPL
upon
excitation,
both
Φ
g
values
up
to
79%
0.022.
well‐defined
molecular
structures
arrangements
CBS
are
directly
observed
through
single
crystal
X‐ray
analysis,
offering
crucial
information
regarding
origins
high‐efficiency
performance.
chirality
amine
effectively
transferred
further
amplified
supramolecular
structure
by
multiple
hydrogen
bonding
π–π
stacking
interactions,
giving
rise
factors;
meanwhile,
fixation
ordered
arrangement
these
interactions
empower
efficient
suppression
motions,
facilitating
fluorescence.
This
work
can
inspire
assembly
via
charge‐assisted
bonds
between
dyes
inducers.
It
also
offers
important
insight
into
structural
Advanced Optical Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 25, 2024
Abstract
Negative
dichroic
dyes
are
crucial
for
enhancing
the
brightness
of
liquid
crystal
displays
(LCDs)
and
modulating
circularly
polarized
luminescence
(CPL)
in
cholesteric
crystals
(CLCs)
through
supramolecular
co‐assembly.
However,
majority
fluorescent
molecules
exhibit
positive
dichroism,
there
is
a
limited
understanding
designing
negative
molecules.
In
this
paper,
novel
design
principle
proposed
to
construct
polymer
by
introducing
space
charge
transfer
(TSCT)
side
chain
structure
backbone.
Specifically,
two
conjugated
polymers
(P1,
P2)
synthesized
using
Suzuki
coupling
reaction
donor‐acceptor
(D‐A)
type
monomers
(V‐type
M1
I‐type
M2)
with
fluorenyl
monomer.
P1
exhibits
its
orientational
order
parameter
(S
F
)
up
S
FP1
=
–0.18.
On
contrary,
P2
dichroism
(
FP2
+
0.27).
This
variation
arises
from
differing
orientations
rigidly
functional
chains
FM1
0.07;
FM2
0.31),
which
affect
alignment
(parallel
or
perpendicular)
backbone
toward
CLCs
phenomenon
facilitates
controllable
precisely
modulates
handedness
CPL
signals,
thereby
facilitating
successful
implementation
multidimensional
information
encryption
systems
CLCs.
