Crystal Growth & Design,
Journal Year:
2024,
Volume and Issue:
24(3), P. 1465 - 1473
Published: Jan. 24, 2024
The
application
of
organic
molecular
crystals
is
currently
limited
by
their
poor
mechanical
properties.
Crystal
engineering
could
be
an
effective
approach
to
design
and
modify
with
different
structures
diverse
other
In
this
work,
we
synthesized
a
series
N-salicylideneaniline
derivatives
(Schiff
Bases)
substituents,
which
exhibited
various
mechano-responsive
behaviors
like
two-dimensional
(2D)
elasticity,
plasticity,
twisting,
fracture.
Besides
that,
distinct
fluorescence
emission
were
observed
due
crystal
structures.
Mechanofluorochromic
phenomena
demonstrated
in
flexible
where
reversible
peak
shift
occurred
elastic
red
appeared
plastic
crystals.
Organic
mechano-sensitive
properties
hold
great
potential
optoelectronic
materials,
such
as
sensors
actuators.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(18), P. 6870 - 6880
Published: April 26, 2024
Exploring
high-performance
flexible
actuators
derived
from
natural
resources
is
crucial
for
the
development
of
green
and
environmentally
friendly
smart
devices.
In
this
study,
we
exfoliated
silk
using
a
deep
eutectic
solvent
(DES)
to
obtain
nanofibers
with
average
diameters
lengths
in
ranges
30–40
2–5
μm,
respectively.
After
DES
treatment,
internal
secondary
conformation
changed;
concentration
β-sheets
increased;
random
coil
structure
was
destroyed.
Furthermore,
nanofibrous
membrane
fabricated
via
suction
filtration-induced
self-assembly.
The
demonstrated
an
outstanding
response
speed
25
s–1
within
relative
humidity
range
0–70%,
accompanied
by
maximum
value
70%.
They
exhibited
exceptional
durability,
bending
capability
1.1
cm–1,
could
be
folded
up
20
times.
By
leveraging
these
properties,
successfully
developed
unique
robot
capable
directional
crawling
weightlifting
through
moisture-driven
mechanisms.
Notably,
innovative
extraordinary
lifting
capacity,
which
exceeded
ten
times
its
own
weight.
This
paper
presents
next-generation
method
manufacturing
biobased
humidity-responsive
actuators.
Crystal Growth & Design,
Journal Year:
2024,
Volume and Issue:
24(15), P. 6284 - 6291
Published: July 23, 2024
Diarylethenes
(DAEs)
are
an
exciting
class
of
stimulus-responsive
organic
molecules
that
exhibit
electrocyclization
reactions
upon
exposure
to
light,
heat,
or
other
stimuli.
The
rational
design
DAE-based
crystalline
materials
is,
however,
complicated
by
the
presence
DAE
atropisomers,
only
one
which
is
photoactive.
Data
mining
CSD
produced
1349
unique
molecular
structures
were
subsequently
analyzed
according
selected
chemical
and
geometric
attributes.
Additional
analyses
performed
on
1078
dithienylethene
(DTE)
structures-the
largest
subgroup
within
ensemble.
crystal
structure
landscape,
based
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 29, 2024
Abstract
Flexible
organic
crystal
materials
with
optical
waveguide
property
have
attracted
much
attention
for
various
applications.
Meanwhile,
the
rising
demand
deep
space
and
polar
explorations
brought
about
a
growing
interest
in
low
temperature
flexibility.
However,
development
of
integrating
elasticity
remains
significant
challenge.
Here,
three
flexible
crystals
bromo‐hydroxy
chalcone
backbone
are
developed
via
molecular
engineering
strategy.
The
4BHIE
4‐bromo‐
N
‐ethyl
substituent
exhibits
superior
2D
under
mechanical
external
forces
≈180°
bending
1.30
mm
curvature.
loss
coefficient
only
0.309
dB
−1
also
demonstrates
potential
applications
optoelectronic
waveguides.
Interestingly,
introduction
longer
alkyl
chain
onto
atom
indole
moiety
(4BHIB)
more
remarkable
flexibility
0.35
curvature
due
to
its
richer
complex
network
intermolecular
interactions
compared
that
4BHIE.
Furthermore,
5BHIE
5‐bromo‐
shows
not
at
room
but
low‐temperature
liquid
nitrogen
reversible
response
owing
strengthening
temperature.
displays
application
environments.
