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
Advanced Materials,
Год журнала:
2022,
Номер
35(10)
Опубликована: Окт. 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.
Angewandte Chemie International Edition,
Год журнала:
2022,
Номер
61(31)
Опубликована: Май 7, 2022
Abstract
Light
offers
unique
opportunities
for
controlling
the
activity
of
materials
and
biosystems
with
high
spatiotemporal
resolution.
Molecular
photoswitches
are
chromophores
that
undergo
reversible
isomerization
between
different
states
upon
irradiation
light,
allowing
a
convenient
means
to
control
their
influence
over
system
interest.
However,
significant
limitation
classical
is
requirement
initiate
switching
in
one
or
both
directions
using
deleterious
UV
light
poor
tissue
penetration.
Red‐shifted
hence
demand
have
attracted
keen
recent
research
In
this
Review,
we
highlight
progress
towards
development
visible‐
NIR‐activated
characterized
by
distinct
photochromic
reaction
mechanisms.
We
hope
inspire
further
endeavors
field,
full
potential
these
tools
biotechnology
chemistry
applications
be
realized.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(30)
Опубликована: Апрель 7, 2023
Photopharmacology
is
an
attractive
approach
for
achieving
targeted
drug
action
with
the
use
of
light.
In
photopharmacology,
molecular
photoswitches
are
introduced
into
structure
biologically
active
small
molecules
to
allow
optical
control
their
potency.
Going
beyond
trial
and
error,
photopharmacology
has
progressively
applied
rational
design
methodologies
devise
light-controlled
bioactive
ligands.
this
review,
we
categorize
photopharmacological
efforts
from
standpoint
medicinal
chemistry
strategies,
focusing
on
diffusible
photochromic
ligands
modified
that
operate
through
E-Z
bond
isomerization.
vast
majority
cases,
photoswitchable
designed
as
analogs
existing
compounds,
a
variety
approaches.
By
analyzing
in
detail
comprehensive
list
instructive
examples,
describe
state
art
discuss
future
opportunities
photopharmacology.
European Journal of Organic Chemistry,
Год журнала:
2022,
Номер
2022(19)
Опубликована: Фев. 26, 2022
Abstract
Molecular
photoswitches
reversibly
convert
the
energy
of
light
into
a
variety
structural
changes
at
molecular
level.
They
can
be
integrated
smart
materials
with
broad
range
applicability.
While
most
photochromic
systems
require
UV
for
activation,
application
operational
entirely
within
visible
or
NIR
brings
considerable
benefits,
such
as
biocompatibility,
better
penetration
through
material,
propelling
sunlight,
possibility
to
design
dual
that
are
mutually
activated
frequencies
two
distinct
functions.
In
this
Review,
we
discuss
relevant
classes
photoswitches,
and
demonstrate
selection
polymers,
gels,
porous
materials,
surfaces,
energy‐storing
other
triggered
light.
Angewandte Chemie International Edition,
Год журнала:
2022,
Номер
61(37)
Опубликована: Июль 16, 2022
Dynamic
patterns
based
on
luminescent
materials
play
an
essential
role
in
the
digital
age.
However,
it
is
still
challenging
to
develop
highly
emissive
photofluorochromic
with
dynamic
behaviors
store
information
multiple
characteristics.
Here,
we
report
a
series
of
dihydroazulene-based
compounds
which
show
typical
aggregation-induced
emission
(AIE)
effect.
Moreover,
photo-switching
ability
dihydroazulene
units,
undergoing
light-induced
ring-opening,
enables
properties.
The
photofluorochromism
also
shows
quantitively
described
responses
time
and
temperature
via
reverse
ring-closing
process.
Ultimately,
rewritable
4D
system,
embedded
quick
response
code,
dot
matrix
microstructures,
color
fluorescence,
time/temperature-dependent
intensity
change,
established
patterns.
This
work
not
only
develops
AIE
skeleton
properties
but
provides
new
strategy
for
encryption
cybernetics.
Journal of the American Chemical Society,
Год журнала:
2023,
Номер
145(16), С. 9072 - 9080
Опубликована: Апрель 12, 2023
A
novel
class
of
photoswitches
based
on
a
phenylazothiazole
scaffold
that
undergoes
reversible
isomerization
under
visible-light
irradiation
is
reported.
The
photoswitch,
which
comprises
thiazole
heteroaryl
segment
directly
connected
to
phenyl
azo
chromophore,
has
very
different
spectral
characteristics,
such
as
redshifted
absorption
maximum
wavelength
and
well-separated
bands
the
trans
cis
isomers,
than
conventional
azobenzene
other
compounds.
Substituents
at
ortho
para
positions
ring
photoswitch
resulted
in
further
shift
longer
wavelengths
up
525
nm
with
small
thermal
stability
compensation.
These
showed
excellent
photostationary
distributions
half-lives
7.2
h,
reductant
stability.
X-ray
crystal
structure
analysis
revealed
isomers
exhibited
planar
geometry
T-shaped
orthogonal
geometry.
Detailed
ab
initio
calculations
demonstrated
plausible
electronic
transitions
energy
barriers,
were
consistent
experimental
observations.
fundamental
design
principles
elucidated
this
study
will
aid
development
wide
variety
for
photopharmacological
applications.
Chemical Reviews,
Год журнала:
2024,
Номер
124(9), С. 5930 - 6050
Опубликована: Апрель 30, 2024
Since
the
last
century,
we
have
witnessed
development
of
molecular
magnetism
which
deals
with
magnetic
materials
based
on
species,
i.e.,
organic
radicals
and
metal
complexes.
Among
them,
broadest
attention
was
devoted
to
molecule-based
ferro-/ferrimagnets,
spin
transition
materials,
including
those
exploring
electron
transfer,
nanomagnets,
such
as
single-molecule
magnets
(SMMs),
qubits,
stimuli-responsive
materials.
Their
physical
properties
open
application
horizons
in
sensors,
data
storage,
spintronics,
quantum
computation.
It
found
that
various
optical
phenomena,
thermochromism,
photoswitching
characteristics,
luminescence,
nonlinear
chiroptical
effects,
well
responsivity
external
stimuli,
can
be
implemented
into
Moreover,
fruitful
interactions
these
effects
provide
new
cross-effects
multifunctionality,
enriching
applications
optical,
electronic,
devices.
This
Review
aims
show
scope
phenomena
generated
recent
advances
areas
high-temperature
photomagnetism,
thermometry
utilizing
SMMs,
addressability
magneto-chiral
dichroism,
opto-magneto-electric
multifunctionality.
These
findings
are
discussed
context
types
accessible
for
classes
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Март 22, 2024
Abstract
Long-wavelength,
near-infrared
small-molecule
dyes
are
attractive
in
biophotonics.
Conventionally,
they
rely
on
expanded
aromatic
structures
for
redshift,
which
comes
at
the
cost
of
application
performance
such
as
photostability,
cell
permeability,
and
functionality.
Here,
we
report
a
ground-state
antiaromatic
strategy
showcase
concise
synthesis
14
cationic
aminofluorene
with
mini
(molecular
weights:
299–504
Da)
distinct
spectra
covering
700–1600
nm.
Aminofluorene
cell-permeable
achieve
rapid
renal
clearance
via
simple
44
Da
carboxylation.
This
accelerates
optical
diagnostics
injury
by
50
min
compared
to
existing
macromolecular
approaches.
We
develop
compact
molecular
sensing
platform
vivo
intracellular
sensing,
demonstrate
versatile
applications
these
multispectral
fluorescence
optoacoustic
imaging.
find
that
aromaticity
reversal
upon
electronic
excitation,
indicated
magnetic
descriptors,
not
only
reduces
energy
bandgap
but
also
induces
strong
vibronic
coupling,
resulting
ultrafast
excited-state
dynamics
unparalleled
photostability.
These
results
support
argument
antiaromaticity
useful
design
rule
dye
development,
enabling
performances
essential
modern
