Artificial Molecular Ratchets: Tools Enabling Endergonic Processes
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(47)
Опубликована: Авг. 7, 2023
Abstract
Non‐equilibrium
chemical
systems
underpin
multiple
domains
of
contemporary
interest,
including
supramolecular
chemistry,
molecular
machines,
prebiotic
and
energy
transduction.
Experimental
chemists
are
now
pioneering
the
realization
artificial
that
can
harvest
away
from
equilibrium.
In
this
tutorial
Review,
we
provide
an
overview
ratchets:
mechanisms
enabling
absorption
environment.
By
focusing
on
mechanism
type—rather
than
application
domain
or
source—we
offer
a
unifying
picture
seemingly
disparate
phenomena,
which
hope
will
foster
progress
in
fascinating
science.
Язык: Английский
Imine-Based Transient Supramolecular Polymers
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 19, 2025
Systems
that
change
properties
upon
exposure
to
chemical
stimuli
offer
the
interesting
prospect
of
(partially)
mimicking
functions
living
systems.
Over
past
decade,
numerous
supramolecular
systems
whose
composition
and
are
regulated
by
dissipation
fuels
have
been
reported.
These
typically
based
on
transient
transformation
a
"dormant"
species
into
an
active,
self-assembling
monomer.
The
process
is
powered
fuel
consumption
terminates
depletion,
restoring
initial
dormant
state.
Previously
reported
out-of-equilibrium
polymerizations
relied
activation
adding
or
removing
small
structural
units
enable
polymerization.
Here,
we
present
approach
combines
reversibility
dynamic
covalent
chemistry
trigger
"recycling"
components
combinatorial
library
(DCL).
Treatment
equilibrated
DCL
aliphatic
imines
aromatic
amines
with
activated
carboxylic
acid
(ACA)
generates
dissipative
protonated
amines.
acidic
conditions
creation
polymer
held
together
interactions
between
crown
ether
moieties
embedded
in
scaffold
imines.
Thus,
reshuffles
connectivity
enables
temporary
purely
(polymeric)
system
polymer.
We
demonstrate
strategy
using
two
different
feedstocks
consisting
diimine
macrocycle
involving
calix[4]arene
distribution
imine
(cyclo)oligomers
derived
from
isophthalaldehyde
skeleton.
Язык: Английский
Chemically Fueled Logic AND Gate with Double Encoding in the Time Domain
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(4), С. 2435 - 2444
Опубликована: Янв. 22, 2024
To
increase
information
density
and
security
in
communication,
Nature
at
times
encodes
signals
the
time
domain,
for
instance,
Ca2+
ion
signals.
Double
encoding
domain
operates
beyond
this
level
of
because
data
are
encoded
two
time-dependent
output
showing
distinct
periods,
frequencies,
full
duration
half-maxima.
illustrate
such
a
protocol,
three-component
ensemble
consisting
double
ion-selective
luminophore
with
receptor
sites,
hexacyclen,
diaza-18-crown-6
ether
is
demonstrated
to
act
as
logic
AND
gate
Ag+
ions
inputs.
The
shows
an
unprecedented
2-fold
time-encoded
fluorescence
590
488
nm
based
on
metal
pulses
periods
when
trichloroacetic
acid
applied
chemical
fuel.
Язык: Английский
Kinetic Trapping of an Out‐of‐Equilibrium Dynamic Library of Imines by Changing Solvent
Chemistry - A European Journal,
Год журнала:
2024,
Номер
30(37)
Опубликована: Апрель 8, 2024
A
well-behaved
dynamic
library
composed
of
two
imines
and
corresponding
amines
was
subjected
to
the
action
an
activated
carboxylic
acid
(ACA),
whose
decarboxylation
is
known
be
base
promoted,
in
different
solvents,
namely
CD
Язык: Английский
Artificial Molecular Ratchets: Tools Enabling Endergonic Processes
Angewandte Chemie,
Год журнала:
2023,
Номер
135(47)
Опубликована: Авг. 7, 2023
Abstract
Non‐equilibrium
chemical
systems
underpin
multiple
domains
of
contemporary
interest,
including
supramolecular
chemistry,
molecular
machines,
prebiotic
and
energy
transduction.
Experimental
chemists
are
now
pioneering
the
realization
artificial
that
can
harvest
away
from
equilibrium.
In
this
tutorial
Review,
we
provide
an
overview
ratchets:
mechanisms
enabling
absorption
environment.
By
focusing
on
mechanism
type—rather
than
application
domain
or
source—we
offer
a
unifying
picture
seemingly
disparate
phenomena,
which
hope
will
foster
progress
in
fascinating
science.
Язык: Английский
Signal Transduction Allows Temporal Control of the Potential of a Concentration Cell Driven by the Decarboxylation of an Activated Carboxylic Acid
Chemistry - A European Journal,
Год журнала:
2023,
Номер
30(13)
Опубликована: Дек. 11, 2023
Abstract
The
use
of
Activated
Carboxylic
Acids
(ACAs)
allows
the
time‐controlled
operation
dissipative
chemical
systems
based
on
acid‐base
reaction
by
providing
both
stimulus
that
temporarily
drives
a
physicochemical
change
and,
subsequently,
counter‐stimulus
with
single
reagent
addition.
However,
their
application
is
inherently
limited
to
acid‐sensitive
systems.
To
overcome
this
limitation,
we
herein
develop
straightforward
device
for
transduction
stimuli
delivered
an
ACA
into
voltage
signal
that,
in
turn,
used
control
voltage‐sensitive
circuits
are
not
pH‐responsive
themselves.
transductor
can
be
easily
assembled
from
common
laboratory
equipment
and
employs
aqueous
solutions
readily
available
chemicals.
Furthermore,
operator
simply
intuitively
tune
amplitude
signal,
as
well
its
duration
offset
varying
concentration
species
involved
process.
Язык: Английский