Chemistry - A European Journal,
Journal Year:
2023,
Volume and Issue:
30(11)
Published: Dec. 13, 2023
Abstract
Emerging
applications
of
photochromic
compounds
demand
new
molecular
designs
that
can
be
inspired
by
some
long‐known
yet
currently
forgotten
classes
photoswitches.
In
the
present
review,
we
remind
community
about
Peri
‐AryloxyQuinones
(PAQs)
and
their
unique
photoswitching
behavior
originally
discovered
more
than
50
years
ago.
At
heart
this
phenomenon
is
light‐induced
migration
an
aromatic
moiety
(arylotropy)
in
peri
‐aryloxy‐substituted
quinones
resulting
ana
‐quinones.
PAQs
feature
absorbance
both
isomers
visible
spectral
region,
photochromism
amorphous
crystalline
state,
thermal
stability
photogenerated
‐isomer.
Particularly
noticeable
high
sensitivity
‐isomer
towards
nucleophiles
solution.
addition
to
mechanism
underlaying
structure‐switch
relationships,
analyze
potential
prospects
aryloxyquinones
optically
switchable
materials
devices.
Due
ability
efficiently
photoswitch
solid
are
indeed
attractive
candidates
for
such
devices,
including
electronics
(optically
controllable
circuits,
switches,
transistors,
memories,
displays),
porous
materials,
actuators,
photoactivated
sensors,
many
more.
This
review
intended
serve
as
a
guide
researchers
who
wish
use
photoswitchable
development
photocontrollable
processes.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(14)
Published: Feb. 19, 2024
Photoresponsive
supramolecular
polymers
have
a
major
potential
for
applications
in
responsive
materials
that
are
externally
triggered
by
light
with
spatio-temporal
control
of
their
polymerisation
state.
While
changes
macroscopic
properties
revealed
the
adaptive
nature
these
materials,
it
remains
challenging
to
capture
dynamic
depolymerisation
process
at
molecular
level,
which
requires
fast
observation
techniques
combined
situ
irradiation.
By
implementing
UV
illumination
into
High-Speed
Atomic
Force
Microscope
(HS-AFM)
setup,
we
been
able
disassembly
light-driven
motor-based
polymer.
The
real-time
visualisation
light-triggered
not
only
reveals
cooperative
depolymerisation,
also
shows
this
continues
after
is
halted.
Combining
data
cryo-electron
microscopy
and
spectroscopy
approaches,
obtain
molecular-level
description
polymer
dynamics
reminiscent
actin
chain-end
depolymerisation.
Our
detailed
understanding
will
drive
development
future
systems.
Chemistry of Materials,
Journal Year:
2024,
Volume and Issue:
36(13), P. 6347 - 6369
Published: June 24, 2024
Supramolecular
polymers
represent
ordered
nanostructures
that
are
held
together
by
highly
directional
noncovalent
bonds
and
can
undergo
reversible
self-assembly.
Their
nature
imparts
stimuli-responsive
character
to
supramolecular
polymers,
making
them
appealing
for
the
development
of
intelligent
soft
materials.
As
compared
inherent
responsiveness
originating
from
connection
units,
incorporating
additional
units
into
monomeric
structure
allows
customization
stimuli-responsiveness
polymers.
Stimuli-triggered
changes
at
molecular
level
amplify
macroscopic
effects
due
arrangement
monomers.
This
review
summarizes
recent
progress
on
stimuli-triggered
transformations
in
categorizing
five
types:
(i)
depolymerization
monomers,
(ii)
within
different
types
(iii)
post-stabilization
(iv)
activation
dormant
monomers
situ
polymerization,
(v)
transient
polymerization
with
programmable
lifetimes.
Additionally,
unconventional
coupled
equilibria
complex
systems
is
outlined.
Emphasis
design
principles
accumulated
property
response
stimuli,
aimed
stimulating
further
research
polymer
field.
Chemistry - A European Journal,
Journal Year:
2023,
Volume and Issue:
30(11)
Published: Dec. 13, 2023
Abstract
Emerging
applications
of
photochromic
compounds
demand
new
molecular
designs
that
can
be
inspired
by
some
long‐known
yet
currently
forgotten
classes
photoswitches.
In
the
present
review,
we
remind
community
about
Peri
‐AryloxyQuinones
(PAQs)
and
their
unique
photoswitching
behavior
originally
discovered
more
than
50
years
ago.
At
heart
this
phenomenon
is
light‐induced
migration
an
aromatic
moiety
(arylotropy)
in
peri
‐aryloxy‐substituted
quinones
resulting
ana
‐quinones.
PAQs
feature
absorbance
both
isomers
visible
spectral
region,
photochromism
amorphous
crystalline
state,
thermal
stability
photogenerated
‐isomer.
Particularly
noticeable
high
sensitivity
‐isomer
towards
nucleophiles
solution.
addition
to
mechanism
underlaying
structure‐switch
relationships,
analyze
potential
prospects
aryloxyquinones
optically
switchable
materials
devices.
Due
ability
efficiently
photoswitch
solid
are
indeed
attractive
candidates
for
such
devices,
including
electronics
(optically
controllable
circuits,
switches,
transistors,
memories,
displays),
porous
materials,
actuators,
photoactivated
sensors,
many
more.
This
review
intended
serve
as
a
guide
researchers
who
wish
use
photoswitchable
development
photocontrollable
processes.
