Molecules,
Journal Year:
2022,
Volume and Issue:
27(8), P. 2586 - 2586
Published: April 18, 2022
Covalent
organic
frameworks
(COFs)
are
a
class
of
crystalline
porous
polymers
with
polygonal
porosity
and
highly
ordered
structures.
The
most
prominent
feature
the
COFs
is
their
excellent
crystallinity
modifiable
one-dimensional
pores.
Since
first
report
them
in
2005,
various
structures
were
successfully
synthesized
applications
wide
range
fields
including
gas
storage,
pollution
removal,
catalysis,
optoelectronics
explored.
In
meantime,
also
exhibited
good
performance
chemical
biological
sensing,
because
pores
allowed
selective
adsorption
analytes,
interaction
between
analytes
COFs’
skeletons
may
lead
to
detectable
change
optical
or
electrical
properties
COFs.
this
review,
we
firstly
demonstrate
basic
principles
COFs-based
then
briefly
summarize
sensing
some
substances
practical
value,
gases,
ions,
compounds,
biomolecules.
Finally,
discuss
trends
challenges
sensing.
Chemical Communications,
Journal Year:
2023,
Volume and Issue:
59(78), P. 11631 - 11647
Published: Jan. 1, 2023
Covalent
organic
frameworks
(COFs)
are
porous
and
crystalline
polymers,
which
have
found
usage
in
various
fields.
These
tailorable
through
the
introduction
of
diverse
functionalities
into
platform.
Indeed,
functionality
plays
a
key
role
their
different
applications.
However,
sometimes
functional
groups
not
compatible
with
reaction
conditions
or
can
compete
interfere
other
monomers
direct
synthetic
method.
Also,
pre-synthesis
bulky
moieties
COFs
negatively
affect
crystal
formation.
To
avoid
these
problems
post-synthetic
modification
(PSM)
approach
is
helpful
tactic.
assistance
this
strategy
size
be
tunable
stability
improved
without
considerable
effect
on
crystallite.
In
addition,
conductivity,
hydrophobicity/
hydrophilicity,
chirality
among
features
that
reformed
review,
types
PSM
strategies
based
recent
articles
been
divided
four
categories:
(i)
post-functionalization,
(ii)
post-metalation,
(iii)
chemical
locking,
(iv)
host-guest
post-modifications.
Post-functionalization
locking
methods
covalent
bond
formation
while
post-metalation
post-modifications,
non-covalent
bonds
formed.
potential
post-modified
energy
storage
conversion
(lithium-sulfur
batteries,
hydrogen
storage,
proton-exchange
membrane
fuel
cells,
water
splitting),
heterogeneous
catalysts,
food
safety
evaluation,
gas
separation,
environmental
domains
(greenhouse
capture,
radioactive
element
uptake,
remediation),
biological
applications
(drug
delivery,
biosensors,
biomarker
chiral
column
chromatography,
solid-state
smart
nanochannels)
discussed.
