Journal of Polymer Science,
Год журнала:
2024,
Номер
62(19), С. 4527 - 4537
Опубликована: Июль 17, 2024
Abstract
In
this
work,
two
novel
pyrimidine‐cored
covalent
organic
frameworks
TpTap‐COF
and
TpTan‐COF
were
synthesized
for
the
first
time
used
adsorption
of
heavy
metal
ions
in
aqueous
solution.
Both
COFs
are
nanofiber
clusters
with
preferable
crystallinity
thermal
stability.
The
impact
parameters
such
as
pH
value,
shaking
time,
initial
concentration,
temperature
studied
by
batch
experiments
multi‐metal
system.
six
onto
follows
pseudo‐second‐order
kinetic
model
Freundlich
isotherm
model,
which
is
a
chemical
process
that
occurs
on
non‐uniform
surfaces.
rate
determined
both
film
diffusion
intraparticle
diffusion.
Further
research
copper
indicates
formation
complexes
between
O#N#N/O#O
chelating
sites
COF
skeleton
Cu
through
sharing
lone
pair
electrons.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(36), С. 48438 - 48447
Опубликована: Авг. 7, 2024
Utilizing
softly
confined
self-assembly
at
the
water
surface
represents
a
promising
approach
for
fabrication
of
two-dimensional
molecular
monolayers
(2D
MMs),
which
have
predominantly
been
concentrated
on
amphiphilic
organic
compounds
before.
Herein,
we
introduce
straightforward
method
termed
"water
surface-assisted
deposition
(WSAMD)"
to
organize
nonamphiphilic
molecules
into
dense
with
high
reproducibility.
To
underscore
versatility
and
merit
this
methodology
in
field
supramolecular
electronics,
successfully
fabricated
range
defect-free,
uniform
semiconducting
polymer
monolayers,
featuring
thickness
reflective
architectures.
The
charge
carrier
mobility
could
reach
0.05
cm
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Дек. 2, 2024
Synthesizing
high-crystalline
covalent
organic
framework
films
is
highly
desired
to
advance
their
applications
in
two-dimensional
optoelectronics,
but
it
remains
a
great
challenge.
Here,
we
report
diffusion-limited
synthesis
strategy
for
wafer-scale
uniform
films,
which
pre-deposited
4,4′,4″,4‴-(1,3,6,8-Tetrakis(4-aminophenyl)
pyrene
encapsulated
on
substrate
surface
with
layer
of
prepolymer.
The
polymer
not
only
prevents
the
dissolution
precursor,
limits
reaction
terephthalaldehyde
dissolved
solution,
thereby
regulating
polymerization
process.
size
depends
growth
substrates,
and
4-inch
have
been
synthesized
silicon
chips.
Their
structure,
thickness,
patterning
crystallization
degree
can
be
controlled
by
adjusting
building
blocks
chemistries,
molybdenum
disulfide
used
as
substrates
construct
vertical
heterostructure.
measurements
reveal
that
using
photosensitive
layer,
heterojunction
displays
enhanced
photoelectric
performance,
simulate
adaptative
function
visual
system.
preparation
high
quality
crystalline
(COF)
without
contamination
controllable
thickness
desirable
optoelectronic
applications.
authors
COF
patterning,
based
adjustment
precursor
block
films.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(37), С. 49594 - 49601
Опубликована: Сен. 4, 2024
Covalent
organic
framework
(COF)
film
with
electrofluorochromic
(EFC)
and
electrochromic
(EC)
properties
has
been
synthesized
by
using
triphenylamine-based
monomers.
The
exhibited
a
high
maximum
fluorescence
contrast
of
151
when
subjected
to
drive
voltage
0.75
V
vs
the
Ag/AgCl
electrode,
causing
be
quenched,
which
resulted
in
EFC
process's
"fluorescence
off"
state.
switching
times
for
on
off
states
were
0.51
7.79
s,
respectively.
Over
same
range,
COF
also
displayed
EC
properties,
achieving
50.23%
coloration
efficiency
297.4
cm
Angewandte Chemie,
Год журнала:
2024,
Номер
136(20)
Опубликована: Март 21, 2024
Abstract
Memristors
are
essential
components
of
neuromorphic
systems
that
mimic
the
synaptic
plasticity
observed
in
biological
neurons.
In
this
study,
a
novel
approach
employing
one‐dimensional
covalent
organic
framework
(1D
COF)
films
was
explored
to
enhance
performance
memristors.
The
unique
structural
and
electronic
properties
two
1D
COF
(COF‐4,4′‐methylenedianiline
(MDA)
COF‐4,4′‐oxydianiline
(ODA))
offer
advantages
for
multilevel
resistive
switching,
which
is
key
feature
computing
applications.
By
further
introducing
TiO
2
layer
on
COF‐ODA
film,
built‐in
electric
field
between
COF‐TiO
interfaces
could
be
generated,
demonstrating
feasibility
utilizing
COFs
as
platform
constructing
memristors
with
tunable
states.
nanochannels
these
structures
contributed
efficient
modulation
electrical
conductance,
enabling
precise
control
over
weights
circuits.
This
study
also
investigated
potential
COF‐based
achieve
energy‐efficient
high‐density
memory
devices.
Journal of Polymer Science,
Год журнала:
2024,
Номер
62(19), С. 4527 - 4537
Опубликована: Июль 17, 2024
Abstract
In
this
work,
two
novel
pyrimidine‐cored
covalent
organic
frameworks
TpTap‐COF
and
TpTan‐COF
were
synthesized
for
the
first
time
used
adsorption
of
heavy
metal
ions
in
aqueous
solution.
Both
COFs
are
nanofiber
clusters
with
preferable
crystallinity
thermal
stability.
The
impact
parameters
such
as
pH
value,
shaking
time,
initial
concentration,
temperature
studied
by
batch
experiments
multi‐metal
system.
six
onto
follows
pseudo‐second‐order
kinetic
model
Freundlich
isotherm
model,
which
is
a
chemical
process
that
occurs
on
non‐uniform
surfaces.
rate
determined
both
film
diffusion
intraparticle
diffusion.
Further
research
copper
indicates
formation
complexes
between
O#N#N/O#O
chelating
sites
COF
skeleton
Cu
through
sharing
lone
pair
electrons.
