Carbazole and Triazine-Based D–A Covalent Organic Framework for Visible Light-Mediated Photocatalytic C–H Activation of Imidazopyridine and Indole
Langmuir,
Journal Year:
2024,
Volume and Issue:
40(45), P. 24148 - 24161
Published: Oct. 29, 2024
Two-dimensional
donor–acceptor
covalent
organic
frameworks
(COFs)
show
considerable
promise
for
metal-free
and
heterogeneous
photocatalysis
due
to
their
efficient
charge
carrier
separation
exciton
transport
upon
photoexcitation.
To
date,
numerous
photocatalysts
have
been
developed.
However,
they
encounter
several
challenges,
such
as
inadequate
sunlight
harvesting
ability,
poor
photostability,
nonreusability.
Fortunately,
the
emergence
of
COFs
presents
a
promising
solution
these
problems.
Herein,
we
report
an
imine-linked
CzTA–TAPT
COF
featuring
carbazole
electron
donor
triazine
acceptor.
Compared
previously
reported
C2-linker-derived
CzDA–TAPT
COF,
this
C3-linked
exhibits
good
transport.
As
consequence,
it
demonstrates
excellent
photocatalytic
applicability
in
C-3
thiocyanation
imidazo[1,2-a]pyridine
indole
under
ambient
conditions
visible
light.
Moreover,
its
broad
substrate
compatibility
high
recyclability
provide
green
sustainable
approach
imidazopyridine
indole.
best
our
knowledge,
is
first
catalyst
demonstrated
imidazo[1,2-a]pyridine.
These
findings
will
inspire
further
research
development
high-performance
D–A
transformations.
Language: Английский
Recent advancements in synthesis and applications of covalent organic frameworks
Sapna Raghav,
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Jyoti Raghav,
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Ma'aruf Abdulmumin Muhammad
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et al.
Applied Materials Today,
Journal Year:
2025,
Volume and Issue:
44, P. 102694 - 102694
Published: April 12, 2025
Language: Английский
Donor–Acceptor Type Covalent Organic Frameworks for Photocatalytic Hydrogen Evolution
Ning Liu,
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Junzhou He,
No information about this author
Jingwei Liu
No information about this author
et al.
ChemistrySelect,
Journal Year:
2025,
Volume and Issue:
10(14)
Published: April 1, 2025
Abstract
Covalent
organic
frameworks
(COFs)
as
a
new
type
of
crystalline
porous
material
with
tunable
structures
are
widely
used
in
the
field
photocatalytic
hydrogen
evolution
(PHE)
due
to
their
large
specific
surface
area
and
abundant
active
sites.
However,
electron‐hole
recombination
during
reaction
process
hinders
progress
reaction.
Donor–acceptor
(D–A)
COFs
can
effectively
promote
charge
carrier
transport
enhance
light
harvesting
capability
by
introducing
D
units
A
into
framework.
The
D–A
have
unique
advantages
PHE.
This
concept
review
concentrates
on
recent
developments
for
PHE
necessary
modules
constructing
COFs.
Moreover,
it
summarizes
challenges
faced
development
directions
future.
Language: Английский
Bipyridine‐Fe (III)–Based Covalent Organic Frameworks for Efficient Photocatalytic Synthesis of Benzimidazoles
Applied Organometallic Chemistry,
Journal Year:
2025,
Volume and Issue:
39(6)
Published: May 2, 2025
ABSTRACT
Covalent
organic
frameworks
(COFs)
with
structural
versatility,
tunable
photophysical
properties,
and
excellent
chemical
stability
recyclability
have
been
widely
used
as
heterogeneous
photocatalysts.
Developing
metal‐based
COFs
for
designability
unprecedented
properties
is
highly
desirable.
In
this
paper,
a
new
COFs‐supported
photocatalyst
BD
Fe
‐COF
embedded
metallic
iron
(III)
was
successfully
synthesized
by
the
metalation
reaction
of
FeCl
3
·6H
2
O
bipyridine‐based
BD‐COF,
which
prepared
aldehyde‐amine
condensation
2,2′‐bipyridine‐5,5′‐dicarboxaldehyde
4,4′,4″,4‴‐(pyrene‐1,3,6,8‐tetrayl)
tetraaniline
via
solvothermal
method.
The
as‐synthesized
exhibited
high
crystalline,
stability,
good
properties.
Moreover,
photoactive
employed
cost‐effective
catalyst
in
cyclocondensation
o
‐phenylenediamine
aldehydes.
advantages
current
photocatalytic
system
included
to
yields,
easy
work‐up
process,
short
time,
together
recyclability.
Language: Английский
Covalent Organic Framework (COF) Based Catalysts for Photocatalytic Cross‐Dehydrogenative Coupling Reactions
ChemPhotoChem,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 29, 2024
Abstract
Covalent
organic
frameworks
(COFs)
are
robust,
porous
materials
with
well‐defined
structures
that
have
been
employed
for
gas
separation,
photoluminescence,
sensing,
energy
storage,
and
heterogeneous
catalysis.
This
review
summarizes
recent
progress
in
the
use
of
COFs
as
a
versatile
platform
photocatalytic
cross‐dehydrogenative
coupling
(CDC)
reactions,
which
an
efficient
clean
methodology
formation
C−C
or
C−P
bonds.
We
synthesis
these
COFs,
correlating
their
catalytic
performance
photoelectric
properties.
Language: Английский