Accounts of Chemical Research,
Год журнала:
2020,
Номер
53(10), С. 2225 - 2234
Опубликована: Сен. 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.
Journal of the American Chemical Society,
Год журнала:
2018,
Номер
140(47), С. 16124 - 16133
Опубликована: Ноя. 3, 2018
Layer
stacking
and
chemical
stability
are
crucial
for
two-dimensional
covalent
organic
frameworks
(2D
COFs),
but
yet
challenging
to
gain
control.
In
this
work,
we
demonstrate
synthetic
control
of
both
the
layer
2D
COFs
by
managing
interlayer
steric
hindrance
via
a
multivariate
(MTV)
approach.
By
co-condensation
triamines
with
without
alkyl
substituents
(ethyl
isopropyl)
di-
or
trialdehyde,
family
two-,
three-,
four-component
AA,
AB,
ABC
is
prepared.
The
groups
periodically
appended
on
channel
walls
their
contents,
which
can
be
synthetically
tuned
MTV
strategy,
model
maximizing
total
crystal
energy
protecting
hydrolytically
susceptible
backbones
through
kinetic
blocking.
Specifically,
higher
concentration
adopt
AB
stacking,
while
lower
amount
functionalities
leads
AA
stacking.
bearing
high
isopropyl
represent
first
identified
that
retain
crystallinity
porosity
in
boiling
20
M
NaOH
solution.
After
postsynthetic
metalation
an
iridium
complex,
2,2'-bipyridyl-derived
heterogeneously
catalyze
C-H
borylation
arenes,
whereas
COF
exhibits
much
activity
than
ethyl
nonsubstituents
due
increased
stability.
This
work
underscores
opportunity
using
tune
properties
COFs.
Journal of the American Chemical Society,
Год журнала:
2019,
Номер
141(51), С. 20187 - 20197
Опубликована: Дек. 1, 2019
Mimicking
cellular
transport
mechanisms
to
make
solid-state
smart
nanochannels
has
long
been
of
great
interest
for
their
diverse
applications,
but
it
poses
a
critical
synthetic
challenge.
Covalent
organic
frameworks
(COFs)
are
porous
crystalline
materials
with
tailor-made
and
hold
potential
ion
molecule
transport.
We
demonstrate
here
the
first
time
that
2D
COFs
possess
necessary
merits
be
promising
selective
amino
acids,
which
basis
life.
By
imine
condensations
C3-symmetric
trialdehyde
mixture
diamines
without
divinyl
groups,
two
vinyl-functionalized
crystallized.
Both
multivariant
afford
straight
1D
mesoporous
channels
formed
by
AA
or
AB
stacking
layered
hexagonal
networks.
After
postmodification
chiral
β-cyclodextrin
(β-CD)
via
thiol–ene
click
reactions,
further
fabricated
into
free-standing
mixed
matrix
membranes
(MMMs)
can
selectively
as
revealed
monitoring
not
only
transmembrane
ionic
current
signature
also
concentration
changes
permeated
substrates.
Specially,
in
membrane
system,
stacked
COF
exhibits
higher
recognition
capability
toward
histidine
enantiomers
than
because
its
uniform
open
decorated
β-CD.
This
work
highlights
platform
accumulating
functional
groups
small
molecules
even
biomolecules
solid
state.
Journal of the American Chemical Society,
Год журнала:
2020,
Номер
142(25), С. 11131 - 11138
Опубликована: Май 30, 2020
The
development
of
robust
synthetic
routes
to
stable
covalent
organic
frameworks
(COFs)
is
important
broaden
the
range
applications
for
these
materials.
We
report
here
a
simple
and
efficient
three-component
assembly
reaction
between
readily
available
aldehydes,
amines,
elemental
sulfur
via
C-H
functionalization
oxidative
annulation
under
transition-metal-free
conditions.
Five
thiazole-linked
COFs
(TZ-COFs)
were
synthesized
using
this
method.
These
materials
showed
high
levels
crystallinity,
specific
surface
areas,
excellent
physicochemical
stability.
photocatalytic
TZ-COFs
investigated,
TZ-COF-4
gave
sacrificial
hydrogen
evolution
rates
from
water
(up
4296
μmol
h-1
g-1
visible
light
irradiation)
coupled
with
stability
recyclability,
sustained
50
h.
Chemical Society Reviews,
Год журнала:
2022,
Номер
51(15), С. 6307 - 6416
Опубликована: Янв. 1, 2022
This
review
highlights
the
recent
advances
of
metalated
covalent
organic
frameworks,
including
synthetic
strategies
and
applications,
discusses
current
challenges
future
directions.
Accounts of Chemical Research,
Год журнала:
2020,
Номер
53(10), С. 2225 - 2234
Опубликована: Сен. 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.
