Chemical Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
Molecular
photoswitches
have
been
incorporated
into
polymer
backbones
to
control
the
macromolecular
conformations
by
structural
changes
of
main-chain
photoswitches.
However,
previous
installed
in
main
chains
are
thermolabile,
which
precludes
deep
understanding,
precise
regulation,
and
practical
applications
conformational
changes.
Herein,
we
focus
on
sterically
hindered
stiff
stilbene
(HSS),
an
emerging
photoswitch
offering
large
isomerization
between
thermally
bistable
Deleted Journal,
Journal Year:
2024,
Volume and Issue:
2(2)
Published: April 21, 2024
Abstract
Inorganic
photochromic
materials,
as
emerging
photoresponsive
have
attracted
unparalleled
interest
because
of
their
potential
applications
in
various
photoactive
devices
such
smart
windows,
optical
memories,
and
decorations.
Over
the
past
decades,
great
research
efforts
been
focused
on
further
development
high‐performance
revealing
underlying
physical
mechanism
well
exploring
new
advanced
applications.
However,
significant
challenges
still
exist
achieving
large
contrast,
realizing
color‐tunable
response,
confirming
detailed
processes.
In
this
review,
latest
progress
inorganic
materials
is
summarized
from
aspects
advance
photochromism,
techniques
for
evaluating
methods
regulating
behavior.
The
information
storage,
photocatalysis,
anti‐counterfeiting,
radiation
dosimetry
so
are
also
discussed.
perspectives
terms
practical
presented.
This
review
aims
to
provide
fundamentals
about
mechanism,
properties
promote
application
devices.
Polymer Journal,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 16, 2024
Abstract
Photoinduced
transitions
between
the
solid,
glass,
and
liquid
states
based
on
molecular
photoswitches
promise
a
wide
variety
of
applications.
Photoswitchable
adhesives
are
representative
examples
expected
to
contribute
material
recycling
for
sustainable
future
in
era
composite
materials
due
strong
bonding
on-demand
photo-induced
debonding
with
minimal
damage
adherends.
Only
few
known
undergo
these
transitions,
but
recent
progress,
mainly
azobenzene,
has
been
remarkable.
Here,
we
review
photoinduced
small
molecules
polymers
over
approximately
decade
systematically
discuss
designs,
mechanisms,
applications,
merits
demerits,
challenges
each
photoswitch
whole
field.
We
hope
this
provides
useful
information,
inspiration,
ideas
development
field
expansion
its
Chemical Science,
Journal Year:
2024,
Volume and Issue:
15(17), P. 6445 - 6453
Published: Jan. 1, 2024
Efficient
interactions
between
an
adhesive
and
a
substrate
surface
at
the
molecular
level
are
basis
for
formation
of
robust
adhesion,
which
substantially
relies
on
interfacial
wetting.
However,
strong
adhesives
usually
improve
cohesion
but
compromise
properties.
Herein,
we
have
reported
kind
supramolecular
based
outstanding
mobility
wettability
precursors.
In
situ
fast
photopolymerization
endows
with
more
adhesion
both
smooth
rough
surfaces
in
air
underwater
contrast
to
their
counterparts
from
thermal
polymerization.
addition
low
viscosity
high
monomer
concentration,
precursors
without
any
organic
solvents
possess
well-defined
hydrogen
bonding
interactions.
These
superior
properties
consistently
contribute
wetting
polymers
weights.
This
work
highlights
that
enhancing
is
promising
route
achieving
adhesion.
Nano Letters,
Journal Year:
2025,
Volume and Issue:
25(2), P. 828 - 836
Published: Jan. 6, 2025
Through
hydrogenation
and
N-N
coupling,
azobenzene
can
be
produced
via
highly
selective
electrocatalytic
nitrobenzene
reduction,
offering
a
mild,
cost-effective,
sustainable
industrial
route.
Inspired
by
the
density
functional
theory
calculations,
introduction
of
H*
active
Ni2P
into
CoP,
which
reduces
water
dissociation
energy
barrier,
optimizes
adsorption,
moderates
key
intermediates'
is
expected
to
assist
its
ability
for
one-step
electrosynthesizing
azobenzene.
A
self-supported
NiCo@Ni2P/CoP
nanorod
array
electrode
was
synthesized,
featuring
NiCo
alloy
nanoparticles
within
Ni2P/CoP
shell.
By
virtue
thermodynamically
optimal
heterostructure,
along
with
overall
fast
electron
transport
in
core-shell
integrated
electrode,
abundant
interfacial
structure
attains
great
conversion
94.3%,
especially
prominent
selectivity
97.2%,
Faradaic
efficiency
94.1%
at
-0.9
V
(vs
Hg/HgO).
High-purity
crystals
also
self-separate
under
refrigeration
postelectrolysis.
This
work
provides
an
energy-efficient
scalable
pathway
economical
preparation
hydrogenation.
Chemical Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Using
photoswitchable
molecules
to
manipulate
supramolecular
interactions
under
light
illumination
has
driven
advancements
in
numerous
fields,
allowing
for
the
strategic
alteration
of
molecular
systems.
However,
integrating
moiety
responsible
these
into
photochromic
scaffold
can
be
complex
and
may
hamper
switching
efficiency.
We
thus
explored
a
simple
class
organic
molecules,
namely
thiosemicarbazones,
featuring
both
photoisomerizable
C[double
bond,
length
as
m-dash]N
double
bond
thiourea
capable
hydrogen
bonding.
The
scalable
two-step
synthesis
allowed
us
prepare
23
thiosemicarbazones
systematically
elucidate
their
optical
properties.
Attaching
various
functional
groups,
extended
π-systems,
heterocycles
enabled
fine-tuning
absorption
profiles.
UV
converts
from
stable
E-isomer
metastable
Z-isomer,
exhibiting
negative
positive
T-type
photochromism,
wide
range
thermal
half-lives,
PSS
values
up
92%,
high
fatigue
resistance.
Substituting
with
pyridinyl
group
stabilizes
Z-isomer
via
intramolecular
bonding,
confirmed
by
single-crystal
X-ray
analysis,
transforms
bistable
P-type
photoswitches.
Additionally,
dimerize
or
form
aggregates
through
bonding-a
process
that
turned
off
on
light.
Overall,
offer
tunable
properties,
rendering
them
promising
photoswitch
creating
stimuli-responsive
Chemistry - A European Journal,
Journal Year:
2024,
Volume and Issue:
30(45)
Published: May 31, 2024
We
report
azopyrazole
photoswitches
decorated
with
variable
N-alkyl
and
alkoxy
chains
(for
hydrophobic
interactions)
phenyl
substituents
on
the
pyrazoles
(enabling
π-π
stacking),
showing
efficient
bidirectional
photoswitching
reversible
light-induced
phase
transition
(LIPT).
Extensive
spectroscopic,
microscopic,
diffraction
studies
computations
confirmed
manifestation
of
molecular-level
interactions
photoisomerization
into
macroscopic
changes
leading
to
LIPT
phenomena.
Using
differential
scanning
calorimetric
(DSC)
studies,
energetics
associated
those
accompanying
processes
were
estimated.
The
long
half-lives
Z
isomers,
high
energy
contents
for
isomerization
transitions,
stability
phases
over
an
extended
temperature
range
(-60
80
°C)
make
them
excellent
candidates
storage
release
applications.
Remarkably,
difference
in
solubility
distinct
one
derivatives
allowed
us
utilize
it
as
a
photoresist
photolithography
applications
diverse
substrates.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 13, 2024
Abstract
Dynamic
covalent
liquid
crystal
networks
(DCv‐LCNs)
with
straightforward
(re)programmability,
reprocessability,
and
recyclability
facilitates
the
manufacture
of
sophisticated
LCN
actuators
intelligent
robots.
However,
DCv‐LCNs
are
still
limited
to
heat‐assisted
programming
polymer‐to‐polymer
reprocessing/recycling,
which
inevitably
lead
deterioration
structures
actuation
performances
after
repeated
programming/processing
treatments,
owing
thermal
degradation
polymer
network
and/or
external
agent
interference.
Here,
a
totally
renewable
azobenzene‐based
DCv‐LCN
room‐temperature
programmability
polymer‐to‐monomers
chemical
is
reported,
was
synthesized
by
crosslinking
azobenzene‐containing
dibenzaldehyde
monomer
triamine
via
dynamic
dissociable
imine
bonds.
Thanks
water‐activated
dynamics
bonds,
resultant
can
be
simply
programmed,
upon
water‐soaking
at
room
temperature,
yield
UV/Vis
light‐driven
actuator.
Importantly,
reported
undergoes
depolymerization
in
an
acid‐solvent
medium
temperature
because
acid‐catalyzed
hydrolysis
giving
rise
easy
separation
recovery
both
monomers
high
purity,
even
tolerance
additives.
The
recovered
pure
used
regenerate
new
actuators,
their
functionalities
reconfigured
removing
old
introducing
additives,
implementing
closed‐loop
polymer‐monomers‐polymer
recycling.
ACS Applied Polymer Materials,
Journal Year:
2024,
Volume and Issue:
6(16), P. 9986 - 9994
Published: Aug. 8, 2024
Photochromic
materials
have
attracted
considerable
attention
due
to
their
potential
applications
in
information
encryption,
intelligent
sensors,
and
environmental
monitoring.
However,
the
preparation
of
photochromic
with
self-healing
properties
high
strength
still
poses
significant
challenges.
Herein,
a
polyurethane
(RBPU-8)
was
synthesized
by
copolymerizing
2,6-pyridinedimethanol
(PDM),
boric
acid
(BA),
poly(tetrahydrofuran)
1000
(PTMEG
1000),
isophorone
diisocyanate
(IPDI),
N-(rhodamine-B)
lactam-1,2-ethylenediamine
(RBNH2).
The
RBPU-8
elastomer
not
only
shows
sensitive
light
response
rate
excellent
efficiency
(93%)
but
also
exhibits
superior
mechanical
(45.5
MPa),
toughness
(231.5
MJ
m–3),
good
fracture
energy
(188.7
KJ
m–2).
In
addition,
multiple
recyclable
stickers
wearable
devices
based
on
were
successfully
fabricated
for
UV
detection
prevention.
