Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(47)
Published: Aug. 13, 2024
Short
peptides
are
versatile
molecules
for
the
construction
of
supramolecular
materials.
Most
reported
peptide
materials
hydrophobic,
stiff,
and
show
limited
response
to
environmental
conditions
in
solid-state.
Herein,
we
describe
a
design
strategy
minimalistic
metallo-peptide
nanofibers
that,
depending
on
their
sequence,
change
stiffness,
or
reversibly
assemble
solid-state,
changes
relative
humidity
(RH).
We
tested
series
histidine
(H)
containing
dipeptides
with
varying
hydrophobicity,
XH,
where
X
is
G,
A,
L,
Y
(glycine,
alanine,
leucine,
tyrosine).
The
one-dimensional
fiber
formation
supported
by
metal
coordination
dynamic
H-bonds.
Solvent
were
identified
GH/Zn
AH/Zn
formed
gels
that
upon
air-drying
gave
rise
nanofibers.
Upon
exposure
nanofiber
networks
increasing
RH,
reduction
stiffness
was
observed
fibers
(dis-)assembled
at
60-70
%
RH
driven
rebalancing
hydrogen
bonding
interactions
between
water.
When
these
deposited
surface
polyimide
films
exposed
peptide/water-vapor
solid-state
mechanically
transferred
polymer
film,
leading
rapid
reversible
folding-unfolding
films,
thus
demonstrating
RH-responsive
actuation.
Advanced Materials,
Journal Year:
2022,
Volume and Issue:
35(10)
Published: Oct. 14, 2022
Photoresponsive
supramolecular
polymers
are
well-organized
assemblies
based
on
highly
oriented
and
reversible
noncovalent
interactions
containing
photosensitive
molecules
as
(co-)monomers.
They
have
attracted
increasing
interest
in
smart
materials
dynamic
systems
with
precisely
controllable
functions,
such
light-driven
soft
actuators,
photoresponsive
fluorescent
anticounterfeiting
light-triggered
electronic
devices.
The
present
review
discusses
light-activated
used
their
main
photo-induced
changes,
e.g.,
geometry,
dipole
moment,
chirality.
Based
these
distinct
formed
by
exhibit
disassembly
reassembly.
As
a
consequence,
polymerization,
"depolymerization,"
regulation
of
the
lengths
topologies
observed.
Moreover,
light-controlled
functions
polymers,
actuation,
emission,
chirality
transfer
along
length
scales,
highlighted.
Furthermore,
perspective
challenges
future
opportunities
is
presented.
Besides
challenge
moving
from
harmful
UV
light
to
visible/near
IR
avoiding
fatigue,
enabling
biomedical
applications,
include
actuators
helical
motion,
light-modulated
information
transmission,
optically
recyclable
materials,
multi-stimuli-responsive
systems.
Journal of the American Chemical Society,
Journal Year:
2021,
Volume and Issue:
143(15), P. 5990 - 5997
Published: April 8, 2021
Controlling
supramolecular
polymerization
by
external
stimuli
holds
great
potential
toward
the
development
of
responsive
soft
materials
and
manipulating
self-assembly
at
nanoscale.
Photochemical
switching
offers
prospect
regulating
structure
properties
systems
in
a
noninvasive
reversible
manner
with
spatial
temporal
control.
In
addition,
this
approach
will
enhance
our
understanding
mechanisms;
however,
control
molecular
assembly
light
remains
challenging.
Here
we
present
photoresponsive
stiff-stilbene-based
bis-urea
monomers
whose
Angewandte Chemie International Edition,
Journal Year:
2021,
Volume and Issue:
60(29), P. 16224 - 16229
Published: May 12, 2021
Abstract
Mortise‐and‐tenon
joints
have
been
widely
used
for
thousands
of
years
in
wooden
architectures
virtue
their
artistic
and
functional
performance.
However,
imitation
similar
structural
mechanical
design
philosophy
to
construct
mechanically
adaptive
materials
at
the
molecular
level
is
a
challenge.
Herein,
we
report
mortise‐and‐tenon
joint
inspired
interlocked
network
(MIN),
which
[2]rotaxane
crosslink
not
only
mimics
structure,
but
also
reproduces
its
function
modifying
properties
MIN.
Benefiting
from
hierarchical
energy
dissipative
ability
along
with
controllable
intramolecular
movement
crosslink,
resultant
MIN
simultaneously
exhibits
notable
adaptivity
stability
single
system,
as
manifested
by
decent
stiffness,
strength,
toughness,
deformation
recovery
capacity.
Journal of the American Chemical Society,
Journal Year:
2022,
Volume and Issue:
144(13), P. 5769 - 5783
Published: March 11, 2022
The
receptor–ligand
interactions
in
cells
are
dynamically
regulated
by
modulation
of
the
ligand
accessibility.
In
this
study,
we
utilize
size-tunable
magnetic
nanoparticle
aggregates
ordered
at
both
nanometer
and
atomic
scales.
We
flexibly
anchor
tunable
sizes
over
cell-adhesive
RGD
(Arg-Gly-Asp)-active
material
surface
while
maintaining
density
dispersed
ligands
accessible
to
macrophages
constant.
Lowering
dispersity
increasing
aggregate
size
constant
facilitates
binding
integrin
receptors
ligands,
which
promotes
adhesion
macrophages.
high
dispersity,
distant
manipulation
lift
(which
increases
accessibility)
stimulates
available
under
augment
macrophage
adhesion-mediated
pro-healing
polarization
vitro
vivo.
low
control
drop
decreases
repels
away
from
aggregates,
thereby
suppressing
adhesion,
inflammatory
polarization.
Here,
present
"accessible
dispersity"
as
a
novel
fundamental
parameter
that
regulates
binding,
can
be
reversibly
manipulated
decreasing
Limitless
tuning
dimensions
morphology
offer
further
insight
into
regulation
host
cells.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(17), P. 12130 - 12137
Published: April 20, 2024
Supramolecular
polymers
display
interesting
optoelectronic
properties
and,
thus,
deploy
multiple
applications
based
on
their
molecular
arrangement.
However,
controlling
supramolecular
interactions
to
achieve
a
desirable
organization
is
not
straightforward.
Over
the
past
decade,
light-matter
strong
coupling
has
emerged
as
new
tool
for
modifying
chemical
and
material
properties.
This
novel
approach
also
been
shown
alter
morphology
of
by
vibrational
bands
solute
solvent
optical
modes
Fabry-Perot
cavity
(vibrational
coupling,
VSC).
Here,
we
study
effect
VSC
polymerization
chiral
zinc-porphyrins
(
Chemical Communications,
Journal Year:
2021,
Volume and Issue:
57(77), P. 9838 - 9841
Published: Jan. 1, 2021
A
simple
and
general
strategy
to
construct
photo-crosslinkable
polymers
by
introducing
sidechain
1,2-dithiolanes
based
on
natural
thioctic
acid
is
presented.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(36)
Published: May 19, 2023
Abstract
Having
external
control
over
fundamental
properties
of
polymers,
such
as
their
physical
state,
is
a
crucial
yet
challenging
design
criterion
for
smart
materials.
Liquifying
polymers
through
photochemical
events
has
significantly
advanced
various
research
lines.
However,
the
opposite
process
solidifying
polymer
that
intrinsically
in
liquid
state
reversibly
with
light
unattained.
Herein,
light‐controlled
liquid‐to‐solid
transition
polysiloxanes
reported,
which
are
decorated
small
number
azobenzene‐functionalized
ureidopyrimidinone
(Azo‐UPy)
pendants.
The
UPy
moieties
toggle
between
intra‐
and
intermolecular
hydrogen
bonding
via
trans
→
cis
photoisomerization
azobenzene.
This
transformation
on
molecular
level
leads
to
formation
strong
supramolecular
cross‐links,
which,
turn,
results
macroscopic
solidification
material.
photoswitching
event
enables
post‐synthetic
tailoring
polymers’
mechanical
properties,
thus
providing
an
alternative
addition
plasticizers
or
hardeners.
Moreover,
adhesion
strength
photochromic
material
increases
by
factor
6
upon
exposure
UV
light.
In
situ
illumination
during
rheological
measurements
reveals
delicate
interplay
wavelength
dependent
penetration
depth
efficiency.
conceptually
new
(de)bonding
demand
strategy
paves
way
creating
light‐responsive
materials
exciting
applications
temporal
adhesion,
recycling,
lithography,
processing.
