Molecules,
Journal Year:
2020,
Volume and Issue:
25(22), P. 5404 - 5404
Published: Nov. 18, 2020
In
the
recent
years,
composite
materials
containing
covalent
organic
frameworks
(COFs)
have
raised
increasing
interest
for
analytical
applications.
To
date,
various
synthesis
techniques
emerged
that
allow
preparation
of
crystalline
and
porous
COF
composites
with
materials.
Herein,
we
summarize
most
common
methods
used
to
gain
access
magnetic
nanoparticles,
other
oxide
materials,
graphene
oxide,
metal
nanoparticles.
Additionally,
some
examples
stainless
steel,
polymer,
metal-organic
framework
are
presented.
Thereafter,
discuss
use
these
chromatographic
separation,
environmental
remediation,
sensing.
ACS Nano,
Journal Year:
2021,
Volume and Issue:
15(2), P. 3309 - 3319
Published: Jan. 25, 2021
Two-dimensional
covalent
organic
frameworks
(2D-COFs)
may
serve
as
an
emerging
family
of
catalysts
with
well-defined
atomic
structures.
However,
the
severe
stacking
2D
nanosheets
and
large
intrinsic
bandgaps
significantly
impair
their
catalytic
performance.
Here,
we
report
coaxial
one-dimensional
van
der
Waals
heterostructures
(1D
vdWHs)
comprised
a
carbon
nanotube
(CNT)
core
thickness
tunable
thienothiophene-pyrene
COF
shell
using
solution-based
in
situ
wrapping
method.
Density
functional
theory
calculations
operando
ex
spectroscopic
analysis
indicate
that
carbon–sulfur
regions
thienothiophene
groups
active
site
for
oxygen
reduction
evolution
reactions.
The
structure
enables
n-doping
from
CNT
to
shell,
which
is
controllable
by
varying
thickness.
charge
transfer
CNTs
lowers
COF's
bandgap
work
function,
reduces
barrier
between
sites
adsorbed
intermediates,
resulting
dramatically
enhanced
activity.
1D
vdWHs
were
applied
bifunctional
electrocatalyst
rechargeable
zinc–air
batteries,
delivering
high
specific
capacity
696
mAh
gZn–1
under
current
density
40
mA
cm–2
excellent
cycling
stability.
based
on
wrapped
around
cores
be
further
used
versatile
building
units
create
multidimensional
exploring
fundamental
physics
chemistry
well
practical
applications
electrochemistry,
electronics,
photonics,
beyond.
ACS Sensors,
Journal Year:
2023,
Volume and Issue:
8(6), P. 2124 - 2148
Published: June 5, 2023
As
an
emerging
porous
crystalline
organic
material,
the
covalent
frameworks
(COFs)
are
given
more
and
attention
in
many
fields,
such
as
gas
storage
separation,
catalysis,
energy
conversion,
luminescent
devices,
drug
delivery,
pollutant
adsorption
removal,
analysis
detection
due
to
their
special
advantages
of
high
crystallinity,
flexible
designability,
controllable
porosities
topologies,
intrinsic
chemical
thermal
stability.
In
recent
years,
COFs
applied
analytical
chemistry,
for
instance,
chromatography,
solid-phase
microextraction,
colorimetric
sensing,
surface-enhanced
Raman
scattering
electroanalytical
chemistry.
The
decorated
electrodes
show
performance
detecting
trace
substances
with
remarkable
selectivity
sensitivity,
heavy
metal
ions,
glucose,
hydrogen
peroxide,
drugs,
antibiotics,
explosives,
phenolic
compounds,
pesticides,
disease
metabolites
so
on.
This
review
mainly
summarized
application
COF
based
electrochemical
sensor
according
different
target
analytes.
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
16(1)
Published: Nov. 30, 2023
Abstract
Covalent
organic
frameworks
(COFs),
a
rapidly
developing
category
of
crystalline
conjugated
polymers,
possess
highly
ordered
structures,
large
specific
surface
areas,
stable
chemical
properties,
and
tunable
pore
microenvironments.
Since
the
first
report
boroxine/boronate
ester-linked
COFs
in
2005,
have
gained
popularity,
showing
important
application
prospects
various
fields,
such
as
sensing,
catalysis,
separation,
energy
storage.
Among
them,
COFs-based
electrochemical
(EC)
sensors
with
upgraded
analytical
performance
are
arousing
extensive
interest.
In
this
review,
therefore,
we
summarize
basic
properties
general
synthesis
methods
used
field
electroanalytical
chemistry,
special
emphasis
on
their
usages
fabrication
sensors,
ions
immunosensors,
aptasensors.
Notably,
emerged
electrochemiluminescence
(ECL)
realm
thoroughly
covered
along
preliminary
applications.
Additionally,
final
conclusions
state-of-the-art
provided
terms
EC
ECL
well
challenges
for
extending
improving
research
applications
chemistry.
Chemical Communications,
Journal Year:
2022,
Volume and Issue:
58(41), P. 6092 - 6095
Published: Jan. 1, 2022
Herein,
an
electrochemical
sensor
was
developed
for
sensitive
detection
of
dopamine
(DA)
based
on
a
novel
COF-based
nanocomposite
named
COF/Pt/MWCNT-COOH,
which
possesses
large
specific
surface
area,
excellent
electrical
conductivity,
and
high
catalytic
activity,
thus
broadening
the
application
COFs
in
sensing
area.
Sensors,
Journal Year:
2022,
Volume and Issue:
22(13), P. 4758 - 4758
Published: June 23, 2022
Covalent
organic
frameworks
(COFs)
are
defined
as
crystalline
polymers
with
programmable
topological
architectures
using
properly
predesigned
building
blocks
precursors.
Since
the
development
of
first
COF
in
2005,
many
works
emerging
this
kind
material
for
different
applications,
such
electrochemical
sensors
and
biosensors.
shows
superb
characteristics,
tuneable
pore
size
structure,
permanent
porosity,
high
surface
area,
thermal
stability,
low
density.
Apart
from
these
special
properties,
COF's
behaviour
can
be
modulated
electroactive
blocks.
Furthermore,
great
variety
functional
groups
that
inserted
their
structures
makes
them
interesting
materials
to
conjugated
biological
recognition
elements,
antibodies,
enzymes,
DNA
probe,
aptamer,
etc.
Moreover,
possibility
linking
other
nanomaterials
opens
a
wide
range
possibilities
develop
new
Cell Reports Physical Science,
Journal Year:
2024,
Volume and Issue:
5(3), P. 101845 - 101845
Published: Feb. 26, 2024
Covalent
organic
frameworks
(COFs)
have
emerged
as
an
important
material
for
antimicrobial
applications
due
to
their
customizable
porous
structures,
abundant
active
sites,
and
good
stability.
In
this
perspective,
we
explore
the
topological
connectivity
in
construction
of
currently
developed
COFs,
which
mainly
include
–B–O–,
–N–H–,
β-ketoenamine,
azine/triazine.
The
advantages
pristine
COFs
mono-
synergistic
antimicrobials
are
integrated
discussed.
We
further
summarize
COF-embedded
hybrid
materials,
such
COFs/metal
nanoparticles,
COFs/metal-organic
frameworks,
COFs/carbon
COFs/other
demonstrate
diverse
design
application
concepts.
Finally,
outline
challenges
promising
prospects
COF
materials
biomedical
industrial
fields,
emphasizing
need
these
from
a
multidimensional
perspective.
Frontiers in Chemistry,
Journal Year:
2020,
Volume and Issue:
8
Published: Nov. 26, 2020
The
metal-free
cousins
of
metal-organic
frameworks,
covalent
organic
frameworks
(COFs),
are
a
class
pre-designable
crystalline
polymers
composed
light
elements
and
connected
by
strong
bonds.
COFs
being
given
more
attention
in
the
electrochemical
sensor
field
due
to
their
fascinating
properties,
such
as
highly
tunable
porosity,
intrinsic
chemical
thermal
stability,
structural
diversity,
large
specific
surface
area,
unique
adsorption
characteristics.
However,
there
still
some
key
issues
regarding
that
need
be
urgently
resolved
before
they
can
effectively
applied
sensing.
In
this
review,
we
summarized
recent
achievements
developing
novel
sensors
based
on
COFs,
discussed
fundamental
challenging
addressed,
including
mechanisms
underlying
charge
transport,
methods
improve
electrical
conductivity,
immobilization
different
substrates,
synthesis
strategies
for
nanoscale
application
fields.
Finally,
challenges
outlooks
promising
tentatively
proposed.
