Journal of CO2 Utilization,
Journal Year:
2024,
Volume and Issue:
82, P. 102760 - 102760
Published: April 1, 2024
Effectively
converting
greenhouse
gas
CO2
into
value-added
chemicals,
without
the
need
for
cocatalysts
or
solvents,
is
a
vital
objective
in
order
to
attain
carbon
neutrality
and
promote
sustainable
development.
However,
achieving
this
goal
continues
pose
significant
challenges.
In
study,
in-situ
formed
octadentate
N5O3
tripodal
ligand
(H3L)
reacts
with
ZnBr2
ZnI2
produce
two
ionic-type
zinc
catalysts,
[Zn2(L)]2[ZnBr4]·4CH3OH
(IZ-1)
[Zn2(L)]I·CH3OH
(IZ-2),
respectively.
[Zn2(L)]
subunit,
Zn
ions
exhibit
non-symmetry
are
coordinated
five-
six-coordinate
mode,
Due
coexistence
of
Lewis
acidic
sites
nucleophilic
Br-
ions,
IZ-1
shows
remarkable
catalytic
performance
cycloaddition
epoxides.
Under
cocatalyst-
solvent-free
conditions,
it
achieves
an
excellent
yield
cyclic
carbonates,
reaching
up
99
%.
The
catalyst
can
be
readily
recovered
reused
at
least
five
times
noticeable
loss
activity.
Mechanistic
investigation
demonstrates
that
improved
activity
attributed
synergistic
effect
centers
Br-.
Moreover,
broad
substrate
scope
further
highlights
its
versatility
applicability
reaction.
Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
63(27), P. 12667 - 12680
Published: June 25, 2024
Several
measures,
including
crude
oil
recovery
improvement
and
carbon
dioxide
(CO2)
conversion
into
valuable
chemicals,
have
been
considered
to
decrease
the
greenhouse
effect
ensure
a
sustainable
low-carbon
future.
The
Knoevenagel
condensation
CO2
fixation
introduced
as
two
principal
solutions
these
challenges.
In
present
study
for
first
time,
bio-metal–organic
frameworks
(MOF)(Cu)/graphene
oxide
(GO)
nanocomposites
used
catalytic
agents
reactions.
view
of
attendance
amine
groups,
biological
MOFs
with
NH2
functional
groups
Lewis
base
sites
protruding
on
channels'
internal
surface
were
used.
bio-MOF(Cu)/20%GO
performs
efficaciously
in
fixation,
leading
more
than
99.9%
TON
=
525
via
solvent-free
reaction
under
1
bar
atmosphere.
It
has
shown
that
are
highly
due
basic
sites,
i.e.,
NH2,
pyrimidine,
C═O
groups.
Besides,
active
exert
synergistic
effects
render
bio-MOF(Cu)/10%GO
nanostructures
efficient
catalysts,
significantly
accelerating
reactions
aldehydes
malononitrile
substrates,
thanks
high
TOF
(1327
h–1)
acceptable
reusability.
Bio-MOFs
can
be
stabilized
using
GO
oxygen-containing
contribute
substitutes,
an
expeditious
speed
facilitating
substrate
absorption.
Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
63(20), P. 9156 - 9163
Published: May 7, 2024
In
this
study,
we
synthesized
and
characterized
a
series
of
cobalt(II)
complexes
bearing
linear
tetradentate
N4
ligands.
These
Co(II)-N4
proved
to
be
efficient
catalysts
for
the
cycloaddition
reaction
between
carbon
dioxide
epoxides
even
at
room
temperature
1
bar
pressure
without
need
solvents
or
cocatalysts.
Furthermore,
when
combined
with
(triphenylphosphoranylidene)ammonium
chloride
(PPNCl)
as
cocatalyst,
Co-N4
exhibited
an
impressive
turnover
frequency
up
41,000
h
Reaction Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
9(11), P. 2938 - 2953
Published: Jan. 1, 2024
The
conversion
of
CO
2
into
high
value-added
chemicals
is
receiving
increasing
attention
from
the
scientific
community,
commercial
enterprises,
and
policymakers
due
to
environmental
problems
like
global
warming.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 16, 2025
Abstract
Developing
highly
efficient
nonprecious
heterogeneous
catalysts
for
the
cycloaddition
of
carbon
dioxide
(CO
2
)
to
cyclic
carbonates
is
crucial
but
challenging
in
modern
chemical
industry.
Here,
a
facile
and
scalable
molecules‐confined
pyrolysis
approach
demonstrated
synthesis
nitrogen‐coordinated
transition‐metal
(TM)
single‐atom
(SACs).
Moreover,
various
coordination
structures
metal
centers
forms
nitrogen
species
are
successfully
revealed.
The
designed
TM
SACs
show
excellent
catalytic
performance
CO
with
epoxides
under
solvent‐free
mild
conditions.
Among
them,
optimum
Zn
SAC
13.2
wt.%
content
achieves
>99%
yield
at
80
°C
within
h
propylene
oxide
carbonate.
comprehension
relationship
between
reaction
mechanism
over
adjacent
N
further
enhanced
through
experimental
investigations
theoretical
simulations.
Significantly,
high
density
Lewis
acid–base
sites
(Zn
species)
can
appropriately
regulate
activation
epoxide
energy
cycloaddition,
respectively,
thus
improving
performance.
This
work
provides
new
insight
into
design
active
stable
reactions.
Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(5), P. 4417 - 4428
Published: Feb. 20, 2024
In
order
to
effectively
convert
greenhouse
gas
CO2
into
high
value-added
chemicals,
simple
and
sustainable
methods
are
urgently
needed.
this
study,
a
novel
metal-anchored
ionic
porous
organic
polymer
(M-iPOP)
named
Zn-HUT4
was
synthesized
via
very
low-cost
synthesis
process.
Further
investigation
conducted
the
use
of
as
heterogeneous
catalyst
in
cycloaddition
reaction
with
epoxides.
The
obtained
had
rich
structure
abundant
metal
anchor
points,
which
can
promote
mass
transfer
offer
substantial
amount
Zn(II)
ions
catalytic
active
sites.
Using
CO2/propylene
oxide
(PO)
model
reaction,
effect
series
conditions
on
experiments
explored.
good
recyclability
substrate
universality.
New Journal of Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
A
cobalt
complex
with
a
tetradentate
aminopyridine
ligand
catalyzes
the
cycloaddition
reactions
of
CO
2
and
epoxides,
constituting
single-component,
efficient
solvent-free
system.
