Helical
assemblies
have
attracted
increasing
attention
to
generate
and
amplify
of
helical
chirality
exploit
advanced
circularly
polarized
luminescent
(CPL)
materials.
However,
the
helicity
induction
with
stimuli
response
in
random-coil
polymers
remains
challenging,
limiting
high
luminescence
dissymmetry
factor
(|glum|)
development
random
coil
for
CPL-based
security
applications.
Herein,
a
simple
universal
approach
is
developed
synthesizing
(P–X–NH2/
cellulose
nanocrystals
(CNC)
nanofilms)
via
coassembly
poly(N-propargylamide)s
amino
acid
residues
CNCs.
The
induced
intensities
nanofilms
are
sensitively
regulated
by
adjusting
temperature,
pH,
solvent
polarity
water
content.
Characterization
results
demonstrated
that
synergistic
effect
hydrogen
bonding
electrostatic
interactions
between
polar
inducers
(CNCs)
P–X–NH2
amide
structures
effectively
twisted
main
chain
polymer
into
cis-transoidal
conformation.
Furthermore,
CPL
chiroptical
devices
constructed
attaching
P–X–NH2/CNC
on
fluorescent
Poly
(N-propargyl
sulfonamide)
(PD)/PVA
film.
excited-state
activity
triggered
|glum|
up
-4.05×10−2.
This
study
at
high-level
from
provides
important
significant
insights
natural
construction
The Canadian Journal of Chemical Engineering,
Journal Year:
2024,
Volume and Issue:
102(8), P. 2695 - 2713
Published: March 18, 2024
Abstract
Cellulose
nanocrystals
(CNCs)
are
commercially
available
materials
derived
from
cellulose,
the
most
abundant
biopolymer
on
our
planet.
Due
largely
to
their
high
strength,
surface
area‐to‐volume
ratio,
tailorable
chemistry,
and
abundance
of
biomass
feedstocks
with
which
produce
them,
CNCs
have
attracted
significant
interest
in
applications
spanning
paints
coatings,
composites,
packaging,
biomedical
sectors.
However,
perhaps
interestingly,
will
self‐assemble
(or,
as
I've
teased
title,
organize
)
form
highly
ordered
chiral
nematic
liquid
crystal
phases
when
concentrated
suspension.
Upon
complete
solvent
evaporation,
this
order
is
‘locked’,
yielding
films
structural
colour—colour
arising
not
due
chemical
pigments,
but
rather
physical
structure
a
material
itself.
In
pursuit
novel
multi‐functional
materials,
research
has
shifted
recently
towards
incorporation
functional
additives
composite
films.
Along
introducing
basics
crystals
self‐assembly,
review
discusses
main
approaches
used
CNC‐based
films:
co‐assembly,
templating,
post‐processing,
highlights
exceptional
examples
each
case.
Finally,
I
give
my
uniquely
Canadian
perspective
current
status,
future
prospects,
major
challenges
associated
development
materials.
Small,
Journal Year:
2023,
Volume and Issue:
20(5)
Published: Sept. 26, 2023
Abstract
Cellulose
nanocrystal
(CNC)
is
a
renewable
resource
derived
from
lignocellulosic
materials,
known
for
its
optical
permeability,
biocompatibility,
and
unique
self‐assembly
properties.
Recent
years
have
seen
great
progresses
in
cellulose
nanocrystal‐based
chiral
photonic
materials.
However,
due
to
inherent
brittleness,
shows
limitations
the
fields
of
flexible
sensors
food
freshness
testing.
In
order
solve
above
limitations,
attempts
been
made
improve
flexibility
materials
without
destroying
their
structural
color.
Despite
these
progresses,
systematic
review
on
them
lacking.
This
aims
fill
this
gap
by
providing
an
overview
main
strategies
latest
research
findings
flexibilization
nematic
film
(FCNM).
Specifically,
typical
substances
methods
used
preparation
are
summarized.
Moreover,
different
kinds
composites
compared
terms
flexibility.
Finally,
potential
applications
future
challenges
discussed,
inspiring
further
field.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(16), P. 9421 - 9426
Published: Jan. 1, 2024
Histidine/tryptophan
and
their
enantiomers
were
stepwise
recognized
by
a
dual-optical-response
system,
responding
to
fluorescence
intensity
variation
chiroptical
activity
regulation.
ACS Applied Electronic Materials,
Journal Year:
2024,
Volume and Issue:
6(6), P. 3955 - 3997
Published: May 22, 2024
The
utilization
of
sensors
has
become
indispensable
in
the
advent
an
intelligent
era
characterized
by
artificial
intelligence,
5G
communication,
big
data,
and
other
cutting-edge
technologies.
Traditional
require
external
power
sources
or
batteries,
resulting
a
complex
sensing
system
that
does
not
promote
development
sustainable
environmentally
friendly
applications
for
health
monitoring.
In
recent
years,
electrical
output
stability
piezoelectric,
triboelectric,
thermoelectric,
hybrid
nanogenerators
have
been
significantly
improved,
enabling
their
widespread
role
self-powered
sensors.
are
capable
performing
tasks
converting
own
energy,
thereby
obviating
need
supply.
this
paper,
we
initially
explore
operating
mechanisms,
device
materials,
structures
diverse
evaluate
efficacy.
Subsequently,
showcase
latest
advancements
sensor
systems,
spanning
various
fields
such
as
biomedical
healthcare,
wearable
devices,
sound
monitoring,
smart
vehicles,
environmental
cities.
paper
also
explores
future
potential
addition
to
discussing
practical
applications.
Macromolecular Chemistry and Physics,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 16, 2025
Abstract
Nonconventional
luminescent
materials
(NLMs)
lacking
extended
π‐conjugated
systems
present
a
burgeoning
field
with
vast
potential
applications
in
cell
image,
and
chemical
sensing.
This
work
explores
the
synthesis,
characterization,
promising
of
novel
NLM
quaternary
ammonium
chitosan
(QCS),
bioimaging
selective
sensing
where
solutions
exhibit
remarkable
tunability
their
photophysical
properties,
influenced
by
concentration,
excitation
wavelength,
temperature.
Notably,
applying
static
pressure
to
solid
sample
significantly
enhances
its
luminous
efficiency,
rising
from
2.15%
2.59%,
inducing
redshift
emission,
emission
shifting
436
452
nm
after
force
action.
Furthermore,
QCS
demonstrates
highly
specific
fluorescent
response
toward
sodium
chlorite
(NaClO₂)
negligible
interference
common
cations
anions.
The
detection
limit
for
NaClO₂
reaches
low
0.297
mg
L
−1
,
highlighting
practical
applications.
Additionally,
exhibits
excellent
biocompatibility
cytotoxicity,
making
it
compelling
candidate
cellular
imaging.
Macromolecular Chemistry and Physics,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 29, 2025
Abstract
Chirality
induction
in
aprotic
polar
solvents
is
challenging
due
to
disrupted
intermolecular
interactions
and
the
high
conformational
flexibility
of
random‐coil
polymers.
Herein,
a
scalable
strategy
using
chiral
BINOL
as
sole
source
induce
helical
chirality
polymers
presented.
Circular
dichroism
(CD),
ultraviolet‐visible
(UV–
vis),
resonance
Raman
spectroscopy
confirm
that
effectively
induces
cis‐transoidal
conformations
through
hydrogen
bonding
π–π
stacking
interactions.
CD
circularly
polarized
luminescence
(CPL)
measurements
reveal
efficient
transfer
amplification,
with
mirror‐image
CPL
signals
observed
at
390
nm.
Resonance
spectra
demonstrate
enhanced
structural
order
reduced
irregularities,
evidenced
by
blue
shift
narrowed
C═C
peak,
while
achiral
exhibits
minimal
ability.
This
study
highlights
mechanisms
excitation
solvents,
providing
versatile
pathway
for
designing
advanced
materials
exceptional
optical
fluorescence
properties.
