Journal of the American Chemical Society,
Год журнала:
2017,
Номер
139(25), С. 8705 - 8709
Опубликована: Июнь 8, 2017
The
design
and
synthesis
of
three-dimensional
covalent
organic
frameworks
(3D
COFs)
bearing
photoelectric
units
have
been
considered
as
a
big
challenge.
Herein,
for
the
first
time,
we
reported
targeted
two
3D
porphyrin-based
COFs
(3D-Por-COF
3D-CuPor-COF),
starting
from
tetrahedral
(3D-Td)
square
(2D-C4)
building
blocks
connected
through
[4
+
4]
imine
condensation
reactions.
On
basis
structural
characterizations,
3D-Por-COF
3D-CuPor-COF
are
microporous
materials
with
high
surface
areas,
proposed
to
adopt
2-fold
interpenetrated
pts
topology
Pmc21
space
group.
Interestingly,
both
photosensitive
can
be
used
heterogeneous
catalyst
generating
singlet
oxygen
under
photoirradiation.
However,
shows
enhanced
photocatalytic
activity
compared
3D-CuPor-COF,
indicating
properties
tuned
by
metalation
porphyrin
rings.
results
here
will
greatly
inspire
us
synthesize
other
metalloporphyrins
interesting
applications
(e.g.,
catalysis)
in
future.
Chemical Reviews,
Год журнала:
2020,
Номер
120(16), С. 8814 - 8933
Опубликована: Янв. 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.
Advanced Functional Materials,
Год журнала:
2018,
Номер
28(33)
Опубликована: Июль 8, 2018
Abstract
Covalent
organic
frameworks
(COFs)
are
crystalline
porous
polymers
formed
by
a
bottom‐up
approach
from
molecular
building
units
having
predesigned
geometry
that
connected
through
covalent
bonds.
They
offer
positional
control
over
their
blocks
in
two
and
three
dimensions.
This
enables
the
synthesis
of
rigid
structures
with
high
regularity
ability
to
fine‐tune
chemical
physical
properties
network.
Feature
Article
provides
comprehensive
overview
realized
date
fast
growing
field
framework
development.
Different
strategies
meet
diverse
demands,
such
as
crystallinity,
straightforward
processability,
or
formation
thin
films
discussed.
Furthermore,
insights
into
fields
COF
applications,
including
gas
storage
separations,
sensing,
electrochemical
energy
storage,
optoelectronics
provided.
Chemical Reviews,
Год журнала:
2016,
Номер
117(3), С. 1515 - 1563
Опубликована: Дек. 30, 2016
Porous
organic
materials
have
garnered
colossal
interest
with
the
scientific
fraternity
due
to
their
excellent
gas
sorption
performances,
catalytic
abilities,
energy
storage
capacities,
and
other
intriguing
applications.
This
review
encompasses
recent
significant
breakthroughs
conventional
functions
practices
in
field
of
porous
find
useful
applications
imparts
a
comprehensive
understanding
strategic
evolution
design
synthetic
approaches
tunable
characteristics.
We
present
an
exhaustive
analysis
strategies
special
emphasis
on
topologies
crystalline
amorphous
materials.
In
addition
elucidating
structure–function
correlation
state-of-the-art
materials,
we
address
challenges
restrictions
that
prevent
us
from
realizing
tailored
structures
properties
for
Journal of the American Chemical Society,
Год журнала:
2017,
Номер
139(7), С. 2786 - 2793
Опубликована: Фев. 13, 2017
A
key
challenge
in
environmental
remediation
is
the
design
of
adsorbents
bearing
an
abundance
accessible
chelating
sites
with
high
affinity,
to
achieve
both
rapid
uptake
and
capacity
for
contaminants.
Herein,
we
demonstrate
how
two-dimensional
covalent
organic
frameworks
(COFs)
well-defined
mesopore
structures
display
right
combination
properties
serve
as
a
scaffold
decorating
coordination
create
ideal
adsorbents.
The
proof-of-concept
illustrated
by
modifying
sulfur
derivatives
on
newly
designed
vinyl-functionalized
mesoporous
COF
(COF-V)
via
thiol–ene
"click"
reaction.
Representatively,
material
(COF-S-SH)
synthesized
treating
COF-V
1,2-ethanedithiol
exhibits
efficiency
removing
mercury
from
aqueous
solutions
air,
affording
Hg2+
Hg0
capacities
1350
863
mg
g–1,
respectively,
surpassing
all
those
thiol
thioether
functionalized
materials
reported
thus
far.
More
significantly,
COF-S-SH
demonstrates
ultrahigh
distribution
coefficient
value
(Kd)
2.3
×
109
mL
which
allows
it
rapidly
reduce
concentration
5
ppm
less
than
0.1
ppb,
well
below
acceptable
limit
drinking
water
(2
ppb).
We
attribute
impressive
performance
synergistic
effects
arising
densely
populated
groups
strong
binding
ability
within
ordered
mesopores
that
allow
diffusion
species
throughout
material.
X-ray
absorption
fine
structure
(XAFS)
spectroscopic
studies
revealed
each
Hg
bound
exclusively
two
S
intramolecular
cooperativity
COF-S-SH,
further
interpreting
its
excellent
affinity.
results
presented
here
reveal
exceptional
potential
COFs
high-performance
remediation.
Chemical Society Reviews,
Год журнала:
2020,
Номер
49(11), С. 3565 - 3604
Опубликована: Янв. 1, 2020
The
current
advances,
structure-property
relationship
and
future
perspectives
in
covalent
organic
frameworks
(COFs)
their
nanosheets
for
electrochemical
energy
storage
(EES)
conversion
(EEC)
are
summarized.
Chemical Society Reviews,
Год журнала:
2020,
Номер
50(1), С. 120 - 242
Опубликована: Дек. 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.
Journal of the American Chemical Society,
Год журнала:
2018,
Номер
140(32), С. 10094 - 10098
Опубликована: Июль 18, 2018
Covalent
organic
frameworks
(COFs)
have
been
proposed
as
alternative
candidates
for
molecular
sieving
membranes
due
to
their
chemical
stability.
However,
developing
COF
with
narrowed
apertures
close
the
size
of
common
gas
molecules
is
a
crucial
task
selective
separation.
Herein,
we
demonstrate
new
type
two-dimensional
layered-stacking
COF-COF
composite
membrane
in
bilayer
geometry
synthesized
on
porous
support
by
successively
regulating
growth
imine-based
COF-LZU1
and
azine-based
ACOF-1
layers
via
temperature-swing
solvothermal
approach.
The
resultant
COF-LZU1-ACOF-1
has
much
higher
separation
selectivity
H2/CO2,
H2/N2,
H2/CH4
mixtures
than
individual
formation
interlaced
pore
networks,
overall
performance
surpasses
Robeson
upper
bounds.
also
shows
high
thermal
long-time
stabilities.
