Angewandte Chemie,
Год журнала:
2023,
Номер
135(48)
Опубликована: Окт. 11, 2023
Abstract
As
a
novel
class
of
materials,
D–A
conjugated
macrocycles
hold
significant
promise
for
chemical
science.
However,
their
potential
in
photovoltaic
remains
largely
untapped
due
to
the
complexity
introducing
multiple
donor
and
acceptor
moieties
into
design
synthesis
cyclic
π‐conjugated
molecules.
Here,
we
report
ring‐like
molecule
(
RCM
)
via
coupling
dimer
DBTP‐C3
as
template
thiophenes
high
yields.
exhibits
narrow
optical
gap
(1.33
eV)
excellent
thermal
stability,
shows
remarkable
photoluminescence
yield
Φ
PL
11.1
%
solution,
much
higher
than
non‐cyclic
analogues.
Organic
solar
cell
(OSC)
constructed
with
electron
efficient
charge
separation
at
donor‐acceptor
band
offsets
achieves
power
conversion
efficiency
(PCE)
14.2
%‐approximately
fourfold
macrocycle‐based
OSCs
reported
so
far.
This
is
partly
low
non‐radiative
voltage
loss
down
0.20
eV
electroluminescence
EL
4×10
−4
.
Our
findings
emphasize
molecules
advancing
organic
technology.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(48)
Опубликована: Окт. 11, 2023
As
a
novel
class
of
materials,
D-A
conjugated
macrocycles
hold
significant
promise
for
chemical
science.
However,
their
potential
in
photovoltaic
remains
largely
untapped
due
to
the
complexity
introducing
multiple
donor
and
acceptor
moieties
into
design
synthesis
cyclic
π-conjugated
molecules.
Here,
we
report
ring-like
molecule
(RCM)
via
coupling
dimer
DBTP-C3
as
template
thiophenes
high
yields.
RCM
exhibits
narrow
optical
gap
(1.33
eV)
excellent
thermal
stability,
shows
remarkable
photoluminescence
yield
(ΦPL
)
11.1
%
solution,
much
higher
than
non-cyclic
analogues.
Organic
solar
cell
(OSC)
constructed
with
electron
efficient
charge
separation
at
donor-acceptor
band
offsets
achieves
power
conversion
efficiency
(PCE)
14.2
%-approximately
fourfold
macrocycle-based
OSCs
reported
so
far.
This
is
partly
low
non-radiative
voltage
loss
down
0.20
eV
electroluminescence
(ΦEL
4×10-4
.
Our
findings
emphasize
molecules
advancing
organic
technology.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(23)
Опубликована: Апрель 6, 2024
Abstract
Biological
proton
channels
have
perfect
selectivity
in
aqueous
environment
against
almost
all
ions
and
molecules,
a
property
that
differs
itself
from
other
biological
feature
remains
challenging
to
realize
for
bulk
artificial
materials.
The
originates
the
fact
channel
has
no
free
space
ion
or
water
transport
but
generates
hydrogen
bonded
wire
presence
of
protons
allow
hopping.
Inspired
by
this,
we
used
interlayer
spacings
covalent
organic
framework
materials
consisting
hydrophilic
functional
groups
as
perfectly
selective
channels.
are
so
narrow
atoms
molecules
can
diffuse
through.
However,
exhibit
diffusivity
same
order
magnitude
water.
Density
theory
calculations
show
COF
material
form
wires,
allowing
We
further
demonstrate
rate
be
tuned
adjusting
acidity
groups.
Nano Letters,
Год журнала:
2024,
Номер
24(28), С. 8650 - 8657
Опубликована: Июль 1, 2024
The
ion
permeability
and
selectivity
of
membranes
are
crucial
in
nanofluidic
behavior,
impacting
industries
ranging
from
traditional
to
advanced
manufacturing.
Herein,
we
demonstrate
the
engineering
ion-conductive
featuring
angstrom-scale
ion-transport
channels
by
introducing
ionic
polyamidoamine
(PAMAM)
dendrimers
for
separation.
exterior
quaternary
ammonium-rich
structure
contributes
significant
electrostatic
charge
exclusion
due
enhanced
local
density;
interior
protoplasmic
PAMAM
dendrimer
assembled
provide
additional
degrees
free
volume.
This
facilitates
monovalent
transfer
while
maintaining
continuity
efficient
screening.
dendrimer-assembled
hybrid
membrane
achieves
high
permeance
2.81
mol
m
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(50)
Опубликована: Окт. 27, 2023
The
large-scale
deployment
of
CO2
electroreduction
is
hampered
by
deficient
carbon
utilization
in
neutral
and
alkaline
electrolytes
due
to
loss
into
(bi)carbonates.
Switching
acidic
media
mitigates
carbonation,
but
suffers
from
low
product
selectivity
because
hydrogen
evolution.
Here
we
report
a
crown
ether
decoration
strategy
on
Cu
catalyst
enhance
methanation
under
conditions.
Macrocyclic
18-Crown-6
found
enrich
potassium
cations
near
the
electrode
surface,
simultaneously
enhancing
interfacial
electric
field
stabilize
*CO
intermediate
accelerate
water
dissociation
boost
protonation.
Remarkably,
mixture
nanoparticles
affords
CH4
Faradaic
efficiency
51.2
%
single
pass
43.0
toward
electrolyte
with
pH=2.
This
study
provides
facile
promote
modifying
catalysts
supramolecules.
Abstract
Biological
ion
channels
can
realize
high‐speed
and
high‐selective
transport
through
the
protein
filter
with
sub‐1‐nanometer
channel.
Inspired
by
biological
channels,
various
kinds
of
artificial
subnanopores,
subnanochannels,
subnanoslits
improved
selectivity
permeability
are
recently
developed
for
efficient
separation,
energy
conversion,
biosensing.
This
review
article
discusses
advanced
fabrication
functionalization
methods
constructing
subnanofluidic
pores,
tubes,
slits,
which
have
shown
great
potential
applications.
Novel
producing
subnanofluidics,
including
top‐down
techniques
such
as
electron
beam
etching,
irradiation,
electrochemical
well
bottom‐up
approaches
starting
from
microporous
frameworks,
polymers,
lipid
bilayer
embedded
stacked
2D
materials
summarized.
Meanwhile,
subnanochannels
discussed
based
on
introduction
functional
groups,
classified
into
direct
synthesis,
covalent
bond
modifications,
molecule
fillings.
These
enabled
construction
precise
control
structure,
size,
functionality.
The
current
progress,
challenges,
future
directions
in
field
also
discussed.
Fabrication
of
large-area
ionic
covalent
organic
framework
membranes
(iCOMs)
remains
a
grand
challenge.
Herein,
the
authors
report
liquid
water
and
vapor-assisted
fabrication
superprotonic
conductive
iCOMs.
A
mixed
monomer
solution
containing
1,3,5-triformylphloroglucinol
(TFP)
in
1,4-dioxane
p-diaminobenzenesulfonic
acid
(DABA)
is
first
polymerized
to
obtain
pristine
membrane
which
subsequently
underwent
crystallization
process
vapors
vapor.
During
polymerization
stage,
played
role
diluting
agent,
weakening
Coulombic
repulsion
between
sulfonic
groups.
vapor
structure-directing
agent
facilitate
formation
highly
crystalline,
The
resulting
achieved
proton
conductivity
value
0.76
S
cm-1
at
90
°C
under
100%
relative
humidity,
among
highest
ever
reported.
Using
as
versatile
additives
open
novel
avenue
from
frameworks
other
kinds
crystalline
materials.
