Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Ноя. 26, 2024
Beetles
exhibit
an
extraordinary
diversity
of
brilliant
and
colourful
appearances
optical
effects
invisible
to
humans.
Their
underlying
mechanisms
have
received
some
attention,
but
we
know
little
about
the
ecological
variables
driving
their
evolution.
Here
investigated
environmental
correlates
reflectivity
circular
polarization
in
a
group
optically
diverse
beetles
(Scarabaeidae–Rutelinae).
We
quantified
properties
261
specimens
representing
46
species
using
spectrophotometry
calibrated
photographs.
Then,
examined
associations
between
these
such
as
temperature,
humidity
vegetation
cover,
controlling
for
body
size
phylogenetic
relatedness.
Our
results
showed
larger
higher
visible
drier
environments.
Unexpectedly,
near-infrared
(NIR)
was
not
correlated
with
variables.
However,
found
correlation
(chiral
nanostructures).
identified
trade-offs
properties:
without
polarization-associated
nanostructures
had
NIR
reflectivity.
By
contrast,
negatively
accumulation
pigments
melanin.
study
highlights
value
macroecological
approach
testing
alternative
hypotheses
explain
understand
link
structure
function.
Abstract
Biominerals
with
complex
hierarchical
structures
present
important
roles,
such
as
defense,
predation,
or
communication,
which
spurs
the
scientists
to
design
biomimetic
strategies
and
mimic
this
microstructure.
This
review
mainly
focuses
on
synthesized
of
chiral
biominerals
inspirations
in
functional
materials.
Additive‐assisted
template‐oriented
can
control
mineral
growth
through
intermolecular
interactions,
triggers
chirality
transfer
from
molecular
level
macroscopic
scale.
Gel‐based
limited
space
reduces
solute
diffusion
rate
prompts
morphology
helical
structure
evolution.
These
play
a
synergetic
role
mineralization
process.
process
is
commonly
dominated
by
nonclassical
routes,
understanding
evolved
mechanism
significant
for
materials
synthesis.
The
superior
performance
minerals
provides
sufficient
inspiration
manufacturing.
twisted
layered
enhances
rigidity
toughness
significantly,
new
sight
hard
preparation.
Chirality
arrangement
displays
optical
characteristic,
expected
be
applied
sensing.
Finally,
further
directions
mechanisms,
production
are
given.
Abstract
Harnessing
nanoscale
molecular
structural
changes
to
achieve
precise
control
over
macroscopic
devices
represents
an
emerging
and
effective
strategy.
One
promising
approach
involves
the
introduction
of
light‐driven
chiral
dopants
into
liquid
crystals
(LCs),
enabling
fine‐tuned
modulation
helical
superstructures
in
cholesteric
(CLCs)
via
photoisomerization.
This
strategy
opens
up
exciting
possibilities
for
development
innovative
photo‐responsive
with
dynamic
functionalities.
review
focuses
on
most
common
used
LCs,
including
azobenzene,
diarylethene,
α
‐cyanostilbene
overcrowded
alkene.
The
chemical
design
principles
these
four
types
switches
are
highlighted,
along
their
abilities
induce
pitch
inversion
CLCs.
Finally,
applications
controlling
showcased,
particularly
display
technologies,
anti‐counterfeiting,
optical
3D
droplet
manipulation.
It
is
hoped
that
this
provides
valuable
insights
guidances
novel
advancement
soft
matter
material
applications.
Advanced Optical Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 31, 2024
Abstract
The
self‐assembled
cellulose
nanocrystal
(CNC)
film
has
a
left‐handed
layered
structure,
which
makes
the
reflection
of
right‐handed
circularly
polarized
(CP)
light
challenge.
Herein,
nematic
phase
layer
is
designed
and
inserted
into
chiral
organization,
to
work
as
half‐wave
retarder
make
ambidextrous
CP
reflection.
maximum
reflectivity
exceeds
80%,
breaks
50%
limitations
single‐direction
current
in
all
reported
CNC‐based
films.
This
“sandwich‐like”
structure
displays
different
optical
properties
on
both
sides,
displayed
chromatism
inversion
circular
dichroism
signals.
dual
direction‐dependent
phenomena
are
reserved
synthesized
luminescence
(CPL)
film,
with
dissymmetry
factor
(
g
lum
)
−0.4245.
However,
this
luminescent
intensity
emission
not
enough
advanced
systems.
designs
triple
CPL
amplification
path
develops
handedness
strategy,
−1.0551
0.4082.
Then,
dual‐directional
films
designed,
where
optics
can
be
switched
on‐demand.
Finally,
photonic
crystal
applied
anti‐counterfeit
superstructure
induction.
International Journal of Molecular Sciences,
Год журнала:
2024,
Номер
25(2), С. 1176 - 1176
Опубликована: Янв. 18, 2024
The
cationic
platinum(II)
organometallic
complex
[Pt(terpy)Me]+
(terpy
=
2,2′:6′,2″-terpyridine)
at
mild
acidic
pH
interacts
with
poly(L-glutamic
acid)
(L-PGA)
in
its
α-helix
conformation,
affording
chiral
supramolecular
adducts.
Their
kinetics
of
formation
have
been
investigated
detail
as
a
function
the
concentrations
both
reagents
and
changing
pH,
ionic
strength,
length
polymeric
scaffold
temperature.
After
very
fast
early
stage,
kinetic
traces
analyzed
three
consecutive
steps,
suggesting
mechanism
based
on
electrostatic
not-organized
aggregate
that
subsequently
evolves
through
different
rearrangements
to
form
eventual
adduct.
A
model
for
this
species
has
proposed
(i)
attractive
interaction
complexes
polyelectrolyte
(ii)
π-stacking
interactions
acting
among
units.
