Accounts of Chemical Research,
Journal Year:
2020,
Volume and Issue:
53(10), P. 2225 - 2234
Published: Sept. 8, 2020
ConspectusCovalent
organic
frameworks
(COFs)
represent
a
novel
type
of
crystalline
porous
polymers
with
potential
applications
in
many
areas.
Considering
their
covalent
connectivity
different
dimensions,
COFs
are
classified
as
two-dimensional
(2D)
layered
structures
or
three-dimensional
(3D)
networks.
In
particular,
3D
have
gained
increasing
attention
recently
because
remarkably
large
surface
areas
(>5000
m2/g),
hierarchical
nanopores
and
numerous
open
sites.
However,
it
has
been
proven
to
be
major
challenge
construct
COFs,
the
main
driving
force
for
synthesis
comes
from
formation
bonds.
addition,
there
several
stones
on
roads
blocking
development
COFs.
First,
successful
topology
design
strategies
limited
[4
+
2]
3]
condensation
reactions
tetrahedral
molecules
linear
triangular
building
blocks
first
decade,
which
led
only
three
available
topologies
(ctn,
bor,
dia)
strongly
restricted
incorporation
some
important
functional
units.
Next,
is
very
challenging
obtain
large-size
single
crystals
same
may
yield
possible
that
quite
difficult
identify
simulations,
structure
determination
considered
issue.
Last,
utilized
synthesize
limited,
further
affects
functionalization
applications.
Therefore,
since
was
announced
2007,
research
studies
regarding
underexplored
years,
few
examples
reported.To
confront
these
obstacles
we
started
contributing
this
field
2016.
interesting
quadrilateral
(e.g.,
pyrene
porphyrin)
cannot
easily
derivatized
into
motifs,
developed
strategy
via
4]
blocks.
After
trials,
found
general
synthetic
build
new
pts
topology.
explored
polycrystalline
prepared
by
our
electron
diffraction
technique.
Moreover,
expanded
toolbox
molecular
creating
successfully
demonstrated
characteristic
properties
Account,
summarize
above
ongoing
contributions,
including
(i)
COFs;
(ii)
attempts
determine
crystal
atomic
resolution;
(iii)
diversification
functionalized
Overall,
not
offer
paradigm
expansion
block
families
but
also
provide
an
idea
future
opportunities
relevant
researchers
field.
Chemical Reviews,
Journal Year:
2020,
Volume and Issue:
120(16), P. 8814 - 8933
Published: Jan. 22, 2020
Covalent
organic
frameworks
(COFs)
are
a
class
of
crystalline
porous
polymers
with
permanent
porosity
and
highly
ordered
structures.
Unlike
other
polymers,
significant
feature
COFs
is
that
they
structurally
predesignable,
synthetically
controllable,
functionally
manageable.
In
principle,
the
topological
design
diagram
offers
geometric
guidance
for
structural
tiling
extended
polygons,
polycondensation
reactions
provide
synthetic
ways
to
construct
predesigned
primary
high-order
Progress
over
past
decade
in
chemistry
these
two
aspects
undoubtedly
established
base
COF
field.
By
virtue
availability
units
diversity
topologies
linkages,
have
emerged
as
new
field
materials
offer
powerful
molecular
platform
complex
tailor-made
functional
development.
Here
we
target
comprehensive
review
field,
historic
overview
survey
advances
topology
reactions,
illustrate
features
diversities,
scrutinize
development
potential
various
functions
through
elucidating
structure–function
correlations
based
on
interactions
photons,
electrons,
holes,
spins,
ions,
molecules,
discuss
key
fundamental
challenging
issues
need
be
addressed,
predict
future
directions
from
chemistry,
physics,
perspectives.
Chemical Society Reviews,
Journal Year:
2020,
Volume and Issue:
50(1), P. 120 - 242
Published: Dec. 7, 2020
Covalent
organic
frameworks
offer
a
molecular
platform
for
integrating
units
into
periodically
ordered
yet
extended
2D
and
3D
polymers
to
create
topologically
well-defined
polygonal
lattices
built-in
discrete
micropores
and/or
mesopores.
Angewandte Chemie International Edition,
Journal Year:
2019,
Volume and Issue:
58(19), P. 6430 - 6434
Published: March 19, 2019
The
construction
of
stable
covalent
organic
frameworks
(COFs)
for
various
applications
is
highly
desirable.
Herein,
we
report
the
synthesis
a
novel
two-dimensional
(2D)
porphyrin-based
sp2
carbon-conjugated
COF
(Por-sp2
c-COF),
which
adopts
an
eclipsed
AA
stacking
structure
with
Brunauer-Emmett-Teller
surface
area
689
m2
g-1
.
Owing
to
C=C
linkages,
Por-sp2
c-COF
shows
high
chemical
stability
under
conditions,
even
harsh
conditions
such
as
9
m
HCl
and
NaOH
solutions.
Interestingly,
can
be
used
metal-free
heterogeneous
photocatalyst
visible-light-induced
aerobic
oxidation
amines
imines.
More
importantly,
in
comparison
imine-linked
Por-COF,
inherent
equips
it
several
advantages
photocatalyst,
including
reusability
photocatalytic
performance.
This
clearly
demonstrates
that
carbon-linked
2D
COFs
provide
interesting
platform
photocatalysis.
Advanced Science,
Journal Year:
2018,
Volume and Issue:
6(2)
Published: Nov. 12, 2018
Abstract
Covalent
organic
frameworks
(COFs)
are
an
emerging
class
of
functional
nanostructures
with
intriguing
properties,
due
to
their
unprecedented
combination
high
crystallinity,
tunable
pore
size,
large
surface
area,
and
unique
molecular
architecture.
The
range
properties
characterized
in
COFs
has
rapidly
expanded
include
those
interest
for
numerous
applications
ranging
from
energy
environment.
Here,
a
background
overview
is
provided,
consisting
brief
introduction
porous
materials
the
design
feature
COFs.
Then,
recent
advancements
as
designer
platform
plethora
emphasized
together
discussions
about
strategies
principles
involved.
Finally,
challenges
remaining
this
type
material
real
outlined.
Angewandte Chemie International Edition,
Journal Year:
2019,
Volume and Issue:
59(13), P. 5050 - 5091
Published: May 30, 2019
Abstract
A
new
approach
has
been
developed
to
design
organic
polymers
using
topology
diagrams.
This
strategy
enables
covalent
integration
of
units
into
ordered
topologies
and
creates
a
polymer
form,
that
is,
frameworks.
is
breakthrough
in
chemistry
because
it
sets
molecular
platform
for
synthesizing
with
predesignable
primary
high‐order
structures,
which
central
aim
over
century
but
unattainable
traditional
principles.
field
its
own
features
are
distinct
from
conventional
polymers.
Review
summarizes
the
fundamentals
as
well
major
progress
by
focusing
on
used
including
principles,
synthetic
strategies,
control
methods.
We
scrutinize
built‐in
functions
specific
structures
revealing
various
interplays
mechanisms
involved
expression
function.
propose
fundamental
issues
be
addressed
future
directions
physics,
materials,
application
perspectives.
Journal of the American Chemical Society,
Journal Year:
2019,
Volume and Issue:
141(45), P. 18271 - 18277
Published: Oct. 28, 2019
Covalent
organic
frameworks
(COFs)
represent
a
new
class
of
porous
crystalline
polymers
with
diversity
applications.
However,
synthesis
uniform
spherical
COFs
poses
great
challenge.
Here,
we
present
size-controllable
from
nanometer
to
micrometer
scale
by
facile
approach
at
room
temperature.
The
as-prepared
different
sizes
exhibited
ultrahigh
surface
area,
good
crystallinity,
and
chemical/thermal
stability.
Multifarious
microscopic
spectroscopic
techniques
were
performed
understand
the
formation
mechanism
influencing
factors
COFs.
Moreover,
general
applicability
for
room-temperature
was
demonstrated
varying
building
blocks.
Spherical
COFs,
because
advantageous
nature
their
hydrophobicity,
mesoporous
microenvironment,
serve
as
an
attractive
restricted-access
adsorption
material
highly
selective
efficient
enrichment
hydrophobic
peptides
size
exclusion
macromolecular
proteins
simultaneously.
On
this
basis,
successfully
applied
specific
capture
ultratrace
C-peptide
human
serum
urine
samples.
This
research
provides
strategy
controllable
extends
application
sample-enrichment
probe
clinical
analysis.
