Chemistry - A European Journal,
Journal Year:
2021,
Volume and Issue:
27(17), P. 5483 - 5491
Published: Jan. 6, 2021
Abstract
A
magnetic
CdS
quantum
dot
(Fe
3
O
4
/polydopamine
(PDA)/CdS)
was
synthesized
through
a
facile
and
convenient
method
from
inexpensive
starting
materials.
Characterization
of
the
prepared
catalyst
performed
by
means
FTIR
spectroscopy,
XRD,
SEM,
TEM,
energy‐dispersive
X‐ray
vibrating‐sample
magnetometer
techniques.
Fe
/PDA/CdS
found
to
be
highly
active
photocatalyst
for
amidation
aromatic
aldehydes
using
air
as
clean
oxidant
under
mild
conditions.
The
can
recovered
separation
successfully
reused
five
cycles
without
considerable
loss
its
catalytic
activity.
Chemical Reviews,
Journal Year:
2021,
Volume and Issue:
122(2), P. 2017 - 2291
Published: Nov. 23, 2021
We
present
here
a
review
of
the
photochemical
and
electrochemical
applications
multi-site
proton-coupled
electron
transfer
(MS-PCET)
in
organic
synthesis.
MS-PCETs
are
redox
mechanisms
which
both
an
proton
exchanged
together,
often
concerted
elementary
step.
As
such,
MS-PCET
can
function
as
non-classical
mechanism
for
homolytic
bond
activation,
providing
opportunities
to
generate
synthetically
useful
free
radical
intermediates
directly
from
wide
variety
common
functional
groups.
introduction
practitioner’s
guide
reaction
design,
with
emphasis
on
unique
energetic
selectivity
features
that
characteristic
this
class.
then
chapters
oxidative
N–H,
O–H,
S–H,
C–H
homolysis
methods,
generation
corresponding
neutral
species.
Then,
reductive
PCET
activations
involving
carbonyl,
imine,
other
X═Y
π-systems,
heteroarenes,
where
ketyl,
α-amino,
heteroarene-derived
radicals
be
generated.
Finally,
we
asymmetric
catalysis
materials
device
applications.
Within
each
chapter,
subdivide
by
group
undergoing
homolysis,
thereafter
type
transformation
being
promoted.
Methods
published
prior
end
December
2020
presented.
Chemical Society Reviews,
Journal Year:
2020,
Volume and Issue:
49(3), P. 839 - 864
Published: Jan. 1, 2020
This
review
highlights
the
luminescent
and
unique
photophysical
properties
of
covalent
organic
frameworks.
Their
potential
use
in
applications
related
to
chemical
sensing,
photocatalysis,
optoelectronics
are
discussed.
Small,
Journal Year:
2020,
Volume and Issue:
16(24)
Published: May 17, 2020
Abstract
Covalent
organic
frameworks
(COFs),
connecting
different
units
into
one
system
through
covalent
bonds,
are
crystalline
porous
materials
with
2D
or
3D
networks.
Compared
conventional
such
as
inorganic
zeolite,
active
carbon,
and
metal‐organic
frameworks,
COFs
a
new
type
of
well‐designed
pore
structure,
high
surface
area,
outstanding
stability,
easy
functionalization
at
the
molecular
level,
which
have
attracted
extensive
attention
in
various
fields,
energy
storage,
gas
separation,
sensing,
photoluminescence,
proton
conduction,
magnetic
properties,
drug
delivery,
heterogeneous
catalysis.
Herein,
recent
advances
metal‐free
versatile
platform
for
catalysis
wide
range
chemical
reactions
presented
synthetic
strategy
promising
catalytic
applications
COF‐based
catalysts
(including
photocatalysis)
summarized.
According
to
types
reactions,
this
review
is
divided
following
five
parts
discussion:
achiral
catalysis,
chiral
conversion,
photocatalytic
conversion
water
splitting
reduction
carbon
dioxide),
pollutant
degradation.
Furthermore,
remaining
challenges
prospects
also
presented.
ACS Catalysis,
Journal Year:
2020,
Volume and Issue:
10(15), P. 8717 - 8726
Published: July 10, 2020
Covalent
organic
frameworks
(COFs)
are
promising
candidates
as
heterogeneous
photocatalysts
because
of
their
porosity
and
tunable
light
absorption.
The
photostability
charge
separation
COFs
highly
important
to
improve
the
efficiency
photocatalytic
transformation.
In
this
work,
a
fully
conjugated
donor–acceptor
COF
is
constructed
with
benzothiadiazole
unit,
which
exhibits
high
stability
enhanced
separation.
prepared
can
efficaciously
produce
superoxide
radical
anions
under
air
visible
light,
mediate
oxidative
amine
coupling
cyclization
thioamide
1,2,4-thiadiazole
in
moderate
yield
recyclability
(18
examples).
This
study
demonstrates
great
capacity
D–A
structure
for
light-driven
synthesis.
Journal of Materials Chemistry A,
Journal Year:
2020,
Volume and Issue:
8(15), P. 6957 - 6983
Published: Jan. 1, 2020
In
this
review,
a
comprehensive
summary
of
the
potential
photocatalytic
applications
realized
to
date
in
fast-growing
field
COFs
is
provided
with
aim
present
full
blueprint
for
photochemical
energy
conversion
and
reactions.
Chemical Society Reviews,
Journal Year:
2022,
Volume and Issue:
51(18), P. 7810 - 7882
Published: Jan. 1, 2022
Although
C–H
functionalization
is
one
of
the
simplest
reactions,
it
requires
use
highly
active
and
selective
catalysts.
Recently,
C–H-active
transformations
using
porous
materials
such
as
crystalline
metal-organic
frameworks
(MOFs)
covalent-organic
(COFs)
well
amorphous
porous-organic
polymers
(POPs)
new
emerging
heterogeneous
catalysts
have
attracted
significant
attention
due
to
their
promising
activity
potential
material
tunability.
These
solids
offer
exceptional
structural
uniformity,
facile
tunability
permanent
porosity.
In
addition,
tuning
catalytic
selectivity
these
can
be
achieved
through
engineering
site
microenvironments,
metal
node
substitution,
linker
changes,
node/linker
functionalization,
pore
modification.
The
present
review
provides
an
overview
current
state
art
on
MOFs,
COFs
POPs
advanced
for
various
bond
activation
providing
details
about
chemo-,
regio-,
stereo-selectivity
control,
comparing
performance
with
that
other
catalysts,
triggering
additional
research
by
showing
limitations
challenges
in
this
area,
a
perspective
future
developments.
Advanced Materials,
Journal Year:
2022,
Volume and Issue:
35(24)
Published: Dec. 23, 2022
Abstract
Organic
photochemistry
is
intensely
developed
in
the
1980s,
which
nature
of
excited
electronic
states
and
energy
electron
transfer
processes
are
thoroughly
studied
finally
well‐understood.
This
knowledge
from
molecular
organic
can
be
transferred
to
design
covalent
frameworks
(COFs)
as
active
visible‐light
photocatalysts.
COFs
constitute
a
new
class
crystalline
porous
materials
with
substantial
application
potentials.
Featured
outstanding
structural
tunability,
large
porosity,
high
surface
area,
excellent
stability,
unique
photoelectronic
properties,
potential
candidates
various
research
areas
(e.g.,
photocatalysis).
review
aims
provide
state‐of‐the‐art
insights
into
COF
photocatalysts
(pristine,
functionalized,
hybrid
COFs)
for
transformations.
The
catalytic
reaction
mechanism
COF‐based
influence
dimensionality
crystallinity
on
heterogenous
photocatalysis
performance
also
discussed,
followed
by
perspectives
prospects
main
challenges
opportunities
future
