Journal of the American Chemical Society,
Journal Year:
2018,
Volume and Issue:
140(25), P. 8027 - 8036
Published: June 1, 2018
Transient
activation
of
biochemical
reactions
by
visible
light
and
subsequent
return
to
the
inactive
state
in
absence
is
an
essential
feature
processes
photoreceptor
cells.
To
mimic
such
light-responsiveness
with
artificial
nanosystems,
polymersome
nanoreactors
were
developed
that
can
be
switched
on
self-revert
fast
dark
at
room
temperature
their
state.
Donor–acceptor
Stenhouse
adducts
(DASAs),
ability
isomerize
upon
irradiation
light,
employed
change
permeability
membranes
switching
polarity
from
a
nonpolar
triene-enol
form
cyclopentenone
increased
polarity.
this
end,
amphiphilic
block
copolymers
containing
poly(pentafluorophenyl
methacrylate)
hydrophobic
synthesized
reversible
addition–fragmentation
chain-transfer
(RAFT)
radical
polymerization
functionalized
either
DASA
based
Meldrum’s
acid
or
novel
fast-switching
pyrazolone-based
DASA.
These
polymers
self-assembled
into
vesicles.
Release
hydrophilic
payload
could
triggered
stopped
as
soon
was
turned
off.
The
encapsulation
enzymes
yielded
photoresponsive
catalyzed
only
if
they
irradiated
light.
A
mixture
nanoreactors,
one
switches
green
other
red
permitted
specific
control
individual
reaction
cascade
pot
varied
wavelengths,
thus
enabling
light-controlled
wavelength-selective
catalysis.
DASA-based
demonstrate
potential
DASAs
switch
find
application
off,
demand,
e.g.,
microfluidics
drug
delivery.
Nature,
Journal Year:
2023,
Volume and Issue:
621(7980), P. 753 - 759
Published: Aug. 23, 2023
Privileged
chiral
catalysts-those
that
share
common
structural
features
and
are
enantioselective
across
a
range
of
reactions-continue
to
transform
the
chemical-research
landscape1.
In
recent
years,
new
reactivity
modes
have
been
achieved
through
excited-state
catalysis,
processes
activated
by
light,
but
it
is
unclear
if
selectivity
ground-state
privileged
catalysts
can
be
matched.
Although
interception
photogenerated
intermediates
cycles
has
partially
addressed
this
challenge2,
single,
photocatalysts
simultaneously
regulate
conspicuously
scarce3.
So
far,
precision
donor-acceptor
recognition
motifs
remain
crucial
in
photocatalyst
design4.
Here
we
show
Al-salen
complexes,
which
well-defined
photophysical
properties,
used
for
efficient
photochemical
deracemization5
cyclopropyl
ketones
(up
98:2
enantiomeric
ratio
(e.r.)).
Irradiation
at
λ
=
400
nm
(violet
light)
augments
commercial
catalyst
enable
enantioselectivity
regulated
simultaneously.
This
circumvents
need
tailored
catalyst-substrate
motifs.
It
predicted
study
will
stimulate
re-evaluation
many
venerable
(ground-state)
processes,
ultimately
leading
identification
candidates
may
considered
'privileged'
both
models.
Deleted Journal,
Journal Year:
2024,
Volume and Issue:
2(1)
Published: Jan. 12, 2024
Abstract
Stimuli‐responsive
fluorescent
hydrogels
are
three‐dimensional
networked
polymeric
materials
with
tunable
luminescence
and
dynamic
properties,
which
play
an
important
role
as
a
water‐rich
soft
material
in
the
fields
of
information
encryption,
bionic
actuation,
bioimaging,
environmental
monitoring,
luminescent
materials.
Compared
conventional
hydrogels,
their
unique
properties
allow
visualization
microscopic
dynamics
within
polymer
network.
By
rational
inclusion
motifs,
such
photoswitches,
AIEgens,
lanthanide
complexes,
host–guest
these
endowed
tunability
emission,
shape,
phase
time
space
response
to
effectors.
In
this
review,
we
summarize
fabrication
strategies
that
mainly
used
by
recently
reported
stimuli‐responsive
applications
Chemical Science,
Journal Year:
2024,
Volume and Issue:
15(11), P. 3872 - 3878
Published: Jan. 1, 2024
Simple
structural
modifications
significantly
boost
the
photochromic
performance
of
imine-based
photoswitches.
This
work
lays
a
foundation
for
exploring
new
motifs
in
light-addressable
dynamic
combinatorial
chemistry.
Journal of the American Chemical Society,
Journal Year:
2018,
Volume and Issue:
140(25), P. 8027 - 8036
Published: June 1, 2018
Transient
activation
of
biochemical
reactions
by
visible
light
and
subsequent
return
to
the
inactive
state
in
absence
is
an
essential
feature
processes
photoreceptor
cells.
To
mimic
such
light-responsiveness
with
artificial
nanosystems,
polymersome
nanoreactors
were
developed
that
can
be
switched
on
self-revert
fast
dark
at
room
temperature
their
state.
Donor–acceptor
Stenhouse
adducts
(DASAs),
ability
isomerize
upon
irradiation
light,
employed
change
permeability
membranes
switching
polarity
from
a
nonpolar
triene-enol
form
cyclopentenone
increased
polarity.
this
end,
amphiphilic
block
copolymers
containing
poly(pentafluorophenyl
methacrylate)
hydrophobic
synthesized
reversible
addition–fragmentation
chain-transfer
(RAFT)
radical
polymerization
functionalized
either
DASA
based
Meldrum’s
acid
or
novel
fast-switching
pyrazolone-based
DASA.
These
polymers
self-assembled
into
vesicles.
Release
hydrophilic
payload
could
triggered
stopped
as
soon
was
turned
off.
The
encapsulation
enzymes
yielded
photoresponsive
catalyzed
only
if
they
irradiated
light.
A
mixture
nanoreactors,
one
switches
green
other
red
permitted
specific
control
individual
reaction
cascade
pot
varied
wavelengths,
thus
enabling
light-controlled
wavelength-selective
catalysis.
DASA-based
demonstrate
potential
DASAs
switch
find
application
off,
demand,
e.g.,
microfluidics
drug
delivery.
