Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
61(42)
Published: Sept. 6, 2022
Designing
materials
with
high
triboelectric
is
an
efficient
way
of
improving
output
performance
nanogenerators
(TENGs).
Herein,
we
synthesized
a
series
covalent
organic
frameworks
(COFs)
similar
skeletons
but
various
functional
groups
ranging
between
electron-donating
and
electron-withdrawing.
These
COFs
form
ideal
platform
for
clarifying
the
contribution
each
group
to
TENG
because
pore
wall
perturbed
in
predesigned
manner.
Kelvin
probe
force
microscopy
computational
data
suggest
that
surface
potentials
electron
affinities
can
be
improved
by
introducing
or
withdrawing
groups,
highest
values
observed
fluorinated
COF.
The
COF
delivered
voltage
current
420
V
64
μA,
respectively,
which
are
comparable
other
reported
materials.
This
strategy
used
efficiently
screen
suitable
as
excellent
performance.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(19), P. 13201 - 13209
Published: May 6, 2024
The
desirable
superimposed
stacking
of
two-dimensional
covalent
organic
frameworks
(2D
COFs)
benefits
out-of-plane
charge
transfer,
whereas
the
actual
deviation
cannot
leverage
potential
2D
COFs
for
optoelectrical
applications.
Herein,
we
report
a
chirality-induced
strategy
to
control
parallel
AA-stacking
sequence
β-ketoenamine-linked
COF
film
supported
on
FTO
substrate.
resulting
chiral
modules
are
periodically
distributed
at
framework
node,
ensuring
identical
mirrored
configurations
layers
stacking.
Such
unique
architectonics
exhibit
prolonged
carrier
lifetime,
fast
charge-transfer
dynamics,
and
ultrahigh
electron
collection
efficiency,
thereby
allowing
excellent
photocurrent
response
38
μA/cm2
0.25
V
(vs
RHE).
origin
superior
performances
lies
in
intensified
exciton
gradient
distribution
density
photoinduced
electron–hole
dissociation
stark
contrast
achiral
analogues.
This
study
highlights
regulated
by
nanoarchitectonics
promises
great
photoelectrical
catalysis.
Arabian Journal of Chemistry,
Journal Year:
2024,
Volume and Issue:
17(4), P. 105634 - 105634
Published: Jan. 21, 2024
In
this
work,
hypercrosslinked
polymeric
adsorbent
(HCP)
was
synthesized
from
para-Xylene
precursor
through
Friedel-Crafts
reaction.
Additionally,
heavy
metal
adsorption
experiments
a
multi
component
system
including
lead,
cadmium,
nickel,
and
copper
ions
were
conducted.
To
enhance
lead
uptake
selectivity
over
other
metallic
ions,
the
resulting
HCP
sample
functionalized
carboxylic
acid
incorporation
into
skeleton.
The
process
modeling
carried
out
by
using
Central
Composite
Design-
Response
Surface
Methodology
technique.
addition,
capability
dependency
of
samples
to
operational
condition
temperature
25
◦C
65
◦C,
solution
pH
value
4
10,
initial
concentration
20
mg/l
100
investigated.
optimization
applied
aim
maximize
selectivity,
optimal
31.8
5.0,
82.50
obtained
for
sample,
also
namely
30
5.5,
modified
sample.
As
result
isotherm
modeling,
Hill
model
as
best
model,
additionally,
thermodynamically
investigation
resulted
in
spontaneously
physically
samples,
with
respect
Gibbs
free
energy
(ΔG0<0)
enthalpy
(ΔH0<20
kj/mol).
Finally,
adsorbents
regeneration
evaluated
minor
losses
capacity
yielded
after
ten
cycles.
Chemistry of Materials,
Journal Year:
2022,
Volume and Issue:
34(12), P. 5726 - 5739
Published: June 9, 2022
Covalent
organic
frameworks
(COFs)
are
an
emerging
class
of
crystalline
porous
materials
with
tailor-made
functionalities
for
improved
photocatalytic
activity.
However,
limited
choice
building
blocks
greatly
restricts
the
photochemical
performance
and
application
scope
COFs
in
photocatalysis.
Herein,
a
covalent
hybridization
approach
is
reported
to
address
these
issues
by
knitting
rigid
macrocyclic
struts,
namely,
pillararenes,
into
extended
network
COFs.
Varying
different
ratios
pillararenes
unique
conformations
electron-rich
cavities
can
not
only
generate
confined
molecular
space
exciton
migration
carrier
transport
but
also
create
new
interfaces
interplay
photogenerated
charge
carriers,
leading
high
promoting
efficient
oxidation
amines
imines.
This
work
paves
way
constructing
macrocycle-derived
provides
promising
platform
photocatalysis
through
predesign
functionalization
pore
surface.
Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
61(42)
Published: Sept. 6, 2022
Designing
materials
with
high
triboelectric
is
an
efficient
way
of
improving
output
performance
nanogenerators
(TENGs).
Herein,
we
synthesized
a
series
covalent
organic
frameworks
(COFs)
similar
skeletons
but
various
functional
groups
ranging
between
electron-donating
and
electron-withdrawing.
These
COFs
form
ideal
platform
for
clarifying
the
contribution
each
group
to
TENG
because
pore
wall
perturbed
in
predesigned
manner.
Kelvin
probe
force
microscopy
computational
data
suggest
that
surface
potentials
electron
affinities
can
be
improved
by
introducing
or
withdrawing
groups,
highest
values
observed
fluorinated
COF.
The
COF
delivered
voltage
current
420
V
64
μA,
respectively,
which
are
comparable
other
reported
materials.
This
strategy
used
efficiently
screen
suitable
as
excellent
performance.
