Journal of the American Chemical Society,
Год журнала:
2018,
Номер
140(25), С. 8027 - 8036
Опубликована: Июнь 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.
Science,
Год журнала:
2020,
Номер
369(6501), С. 302 - 306
Опубликована: Июль 17, 2020
An
E-Z
boron
swivel
Compounds
with
carbon-carbon
double
bonds
can
form
two
distinct
isomers,
depending
on
whether
the
heaviest
substituents
both
carbons
lie
same
side
(labeled
Z)
or
diagonally
across
from
each
other
E).
Molloy
et
al.
present
a
convenient
method
to
reorient
that
bear
and
carbonyl
substituents.
When
they
are
opposed,
stay
in
plane,
bond
is
easily
swiveled
by
photosensitization.
However,
once
as
carbonyl,
rotates
out
of
plane
further
sensitization
inhibited.
Science
this
issue
p.
302
Journal of the American Chemical Society,
Год журнала:
2021,
Номер
143(10), С. 3865 - 3873
Опубликована: Март 5, 2021
It
is
difficult
to
assemble
multi-component
metallo-supramolecular
architectures
in
a
non-statistical
fashion,
which
limits
their
development
toward
functional
materials.
Herein,
we
report
system
of
interconverting
bowls
and
cages
that
are
able
respond
various
selective
stimuli
(light,
ligands,
anions),
based
on
the
self-assembly
photochromic
dithienylethene
(DTE)
ligand,
La,
with
PdII
cations.
By
combining
concept
"coordination
sphere
engineering",
relying
bulky
quinoline
donors,
reversible
photoswitching
between
ligand's
open
(o-La)
closed
(c-La)
forms,
[Pd2(o-La)4]
cage
(o-C)
[Pd2(c-La)3]
bowl
(c-B)
were
obtained,
respectively.
This
structural
rearrangement
modulates
system's
guest
uptake
capabilities.
Among
three
bis-sulfonate
guests
(G1,
G2,
G3),
can
encapsulate
only
smallest
(G1),
while
binds
all
them.
Bowl
c-B
was
further
used
synthesize
series
heteroleptic
cages,
[Pd2LA3LB],
representing
motif
never
reported
before.
Additional
ligands
(Lc-f),
short
or
long
arms,
tune
cavity
size,
thus
enabling
preventing
uptake.
Addition
Br-/Ag+
makes
it
possible
change
overall
charge,
again
triggering
release,
as
well
fourth
ligand
de-/recomplexation.
In
combination,
site-selective
introduction
functionality
application
external
lead
an
intricate
hosts
different
preferences.
A
high
degree
complexity
achieved
through
cooperativity
few
components.
Chemical Reviews,
Год журнала:
2022,
Номер
122(9), С. 8487 - 8593
Опубликована: Март 17, 2022
The
exciton,
an
excited
electron-hole
pair
bound
by
Coulomb
attraction,
plays
a
key
role
in
photophysics
of
organic
molecules
and
drives
practically
important
phenomena
such
as
photoinduced
mechanical
motions
molecule,
photochemical
conversions,
energy
transfer,
generation
free
charge
carriers,
etc.
Its
behavior
extended
π-conjugated
disordered
films
is
very
different
rich
compared
with
exciton
inorganic
semiconductor
crystals.
Due
to
the
high
degree
variability
systems
themselves,
not
only
exerts
changes
on
that
carry
it
but
undergoes
its
own
during
all
phases
lifetime,
is,
birth,
conversion
transport,
decay.
goal
this
review
give
systematic
comprehensive
view
molecular
assemblies
at
evolution
emphasis
rates
typical
for
dynamic
picture
various
consequences
above
dynamics.
To
uncover
variety
behavior,
details
formation,
conversion,
direct
reverse
intersystem
crossing,
radiative
nonradiative
decay
are
considered
systems,
where
these
processes
lead
or
influenced
static
disorder,
distribution
symmetry
breaking,
reactions,
electron
proton
structural
rearrangements,
coupling
vibrations
intermediate
particles,
dissociation
annihilation
well.
Angewandte Chemie International Edition,
Год журнала:
2022,
Номер
61(48)
Опубликована: Сен. 26, 2022
Dynamic
covalent
polymer
networks
provide
an
interesting
solution
to
the
challenging
recyclability
of
thermosets
and
elastomers.
One
remaining
design
constraints,
however,
is
balancing
thermal
reprocessability
in
form
material
flow
with
dimensional
stability
during
use.
As
a
result,
many
chemistries
are
being
investigated
order
improve
bond
reactivity
control
robustness.
This
Minireview
highlights
number
promising
concepts,
particular
emphasis
on
disconnecting
chemical
low
high
temperature
regimes
obtain
creep
resistant,
yet
highly
dynamic
networks.
In
addition,
we
will
highlight
impact
sharp
changes
when
applying
extrapolation-based
approaches
rheological
analysis.
confident
that
abandoning
myth
"permanent"
aid
development
sustainable
polymeric
materials
can
truly
combine
benefits
thermoplastic
thermoset
behaviour.
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.
ACS Applied Materials & Interfaces,
Год журнала:
2022,
Номер
15(21), С. 25248 - 25274
Опубликована: Июнь 17, 2022
The
creation
of
matter
with
varying
degrees
complexities
and
desired
functions
is
one
the
ultimate
targets
self-assembly.
ability
to
regulate
complex
interactions
between
individual
components
essential
in
achieving
this
target.
In
direction,
initial
success
controlling
pathways
final
thermodynamic
states
a
self-assembly
process
promising.
Despite
progress
made
field,
there
has
been
growing
interest
pushing
limits
processes.
main
inception
that
intended
self-assembled
state,
complexities,
may
not
be
"at
equilibrium
(or
at
global
minimum)",
rendering
free
energy
minimization
unsuitable
form
product.
Thus,
we
believe
thorough
understanding
design
principles
as
well
predict
outcome
collection
next
generation
matter.
present
review
highlights
potent
role
finely
tuned
interparticle
nanomaterials
achieve
preferred
structures
properties.
We
bringing
prediction
nanoparticle
processes
will
have
similar
effect
retrosynthesis
had
on
logic
chemical
synthesis.
Along
guiding
principles,
gives
summary
different
types
products
created
from
assemblies
functional
properties
emerging
them.
Finally,
highlight
reasonable
expectations
field
challenges
lying
ahead
evolvable
