Chemistry - An Asian Journal,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 30, 2025
Hydroxide
exchange
membranes
(HEMs)
have
attracted
extensive
attention
in
energy-related
fields,
such
as
fuel
cells
and
water
electrolysis,
primarily
due
to
their
suitability
for
alkaline
environments.
However,
the
practical
application
of
is
hindered
significantly
by
limited
conductivity.
In
this
study,
a
series
amphoteric
metal
ion-coordinated
chitosan
(CTS-AM)
with
enhanced
hydroxide
ion
conductivity
are
reported.
The
CTS-AM
prepared
using
simple
soaking-drying
method,
exhibiting
excellent
mechanical
strength
thermal
stability
strong
coordination
bonds
between
ions
chains.
To
best
our
knowledge,
Zn2+
coordinated
membrane
achieved
highest-ever
reported
82.0
±
5.4
mS
cm-1
at
25
°C
100%
RH,
value
increasing
301.0
6.7
operating
temperature
(80
°C)
RH.
Through
combined
structural
analysis
theoretical
calculations,
we
propose
that
formation
nanochannels
lowered
barrier
electron
transfer
responsible
high
conductivities
membranes.
This
study
presents
viable
approach
design
fabrication
high-performance
HEMs
energy
storage
devices
other
applications.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(22)
Опубликована: Апрель 2, 2024
The
ion
extraction
and
electro/photo
catalysis
are
promising
methods
to
address
environmental
energy
issues.
Covalent
organic
frameworks
(COFs)
a
class
of
template
construct
absorbents
catalysts
because
their
stable
frameworks,
high
surface
areas,
controllable
pore
environments,
well-defined
catalytic
sites.
Among
them,
ionic
COFs
as
unique
crystalline
porous
materials,
with
charges
in
the
or
along
walls,
have
shown
different
properties
resulting
performance
these
applications
those
from
charge-neutral
COFs.
In
this
review,
current
research
progress
based
on
for
conversion,
including
cationic/anionic
materials
is
reviewed
terms
synthesis
strategy,
modification
methods,
mechanisms
adsorption
catalysis,
well
applications.
Finally,
we
demonstrated
challenges
future
development
design
strategies
Angewandte Chemie,
Год журнала:
2024,
Номер
136(22)
Опубликована: Апрель 2, 2024
Abstract
The
ion
extraction
and
electro/photo
catalysis
are
promising
methods
to
address
environmental
energy
issues.
Covalent
organic
frameworks
(COFs)
a
class
of
template
construct
absorbents
catalysts
because
their
stable
frameworks,
high
surface
areas,
controllable
pore
environments,
well‐defined
catalytic
sites.
Among
them,
ionic
COFs
as
unique
crystalline
porous
materials,
with
charges
in
the
or
along
walls,
have
shown
different
properties
resulting
performance
these
applications
those
from
charge‐neutral
COFs.
In
this
review,
current
research
progress
based
on
for
conversion,
including
cationic/anionic
materials
is
reviewed
terms
synthesis
strategy,
modification
methods,
mechanisms
adsorption
catalysis,
well
applications.
Finally,
we
demonstrated
challenges
future
development
design
strategies
ACS Nano,
Год журнала:
2024,
Номер
18(8), С. 6016 - 6027
Опубликована: Фев. 13, 2024
Ion
exchange
membranes
allowing
the
passage
of
charge-carrying
ions
have
established
their
critical
role
in
water,
environmental,
and
energy-relevant
applications.
The
design
strategies
for
high-performance
ion
evolved
beyond
creating
microphase-separated
membrane
morphologies,
which
include
advanced
to
ion-selective
membranes.
properties
functions
been
repeatedly
updated
by
emergence
materials
with
subnanometer-sized
pores
understanding
movement
under
confined
micropore
channels.
These
research
progresses
motivated
researchers
consider
even
greater
aims
field,
i.e.,
replicating
channels
living
cells
exotic
or
at
least
targeting
fast
ion-specific
transmembrane
conduction.
To
help
realize
such
goals,
we
briefly
outline
comment
on
fundamentals
rationally
designing
pore
ultrafast
specific
conduction,
architecture/chemistry,
materials.
Challenges
are
discussed,
perspectives
outlooks
given.
ACS Central Science,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 29, 2024
Imine-linked
covalent
organic
frameworks
(COFs)
usually
show
high
crystallinity
and
porosity,
while
vinyl-linked
COFs
have
excellent
semiconducting
properties
stability.
Therefore,
achieving
the
advantages
of
imine-
vinyl-linkages
in
a
single
COF
material
is
highly
interesting
but
remains
challenging.
Herein,
we
demonstrate
fabrication
layer-blocked
(LB-COF)
heterogeneous
film
that
composed
through
two
successive
surface-initiated
polycondensations.
In
brief,
bottom
layer
imine-linked
was
constructed
on
an
amino-functionalized
substrate
via
Schiff-base
polycondensation,
which
unreacted
aldehyde
edges
could
be
utilized
for
initiating
aldol
polycondensation
to
prepare
second
film.
The
resultant
LB-COF
displays
ordering
due
crystalline
templating
effect
from
layer;
meanwhile,
upper
strongly
enhance
its
stability
photocatalytic
properties.
LB
also
presents
superior
performance
uranium
extraction
(320
mg
g
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(22)
Опубликована: Март 26, 2024
Abstract
Porous
aromatic
frameworks
(PAFs)
show
promising
potential
in
anionic
conduction
due
to
their
high
stability
and
customizable
functionality.
However,
the
insolubility
of
most
PAFs
presents
a
significant
challenge
processing
into
membranes
subsequent
applications.
In
this
study,
continuous
PAF
with
adjustable
thickness
were
successfully
created
using
liquid‐solid
interfacial
polymerization.
The
rigid
backbone
stable
C−C
coupling
endow
membrane
superior
chemical
dimensional
stabilities
over
conventional
polymer
membranes.
Different
quaternary
ammonium
functionalities
anchored
through
flexible
alkyl
chains
tunable
length.
optimal
exhibited
an
OH
−
conductivity
356.6
mS
⋅
cm
−1
at
80
°C
98
%
relative
humidity.
Additionally,
outstanding
alkaline
stability,
retaining
95
its
after
1000
hours
1
M
NaOH.
To
best
our
knowledge,
is
first
application
materials
anion
exchange
membranes,
achieving
highest
exceptional
chemical/dimensional
stability.
This
work
provides
possibility
for
conductive
