Materials science forum,
Journal Year:
2023,
Volume and Issue:
1099, P. 189 - 195
Published: Oct. 5, 2023
Metal
oxides
represent
“workhorse
catalysts”
for
the
chemical
industry
with
multifarious
applications
in
dehydrogenation,
metathesis,
transesterification,
and
combustion
reactions.
It
is
therefore
crucial,
each
given
catalytic
process,
to
investigate
impact
of
morphological
physicochemical
properties
on
performance.
oxide
materials
are
being
increasingly
applied
as
inexpensive
cycloaddition
CO
2
epoxides
but
correlation
between
metal
their
activity
has
not
been
systematically
investigated.
In
this
work,
we
prepared
nanostructured
tin
(IV)
(SnO
)
zinc
(ZnO)
different
morphologies
such
quantum
dots
(QDs),
nanowires
(NWs),
microdisks
(µDs)
nanoplates
(NPLs).
Following
characterization,
these
were
investigated,
combination
low
amounts
tetrabutylammonium
iodide
(TBAI)
a
nucleophile,
styrene
(SO)
yielding
cyclic
carbonate
(SC)
under
atmospheric
pressure.
The
performance,
surface
area,
acidity
basicity
was
investigated
discussed.
Molecules,
Journal Year:
2024,
Volume and Issue:
29(10), P. 2307 - 2307
Published: May 14, 2024
The
cycloaddition
of
CO2
to
epoxides
afford
versatile
and
useful
cyclic
carbonate
compounds
is
a
highly
investigated
method
for
the
nonreductive
upcycling
CO2.
One
main
focuses
current
research
in
this
area
discovery
readily
available,
sustainable,
inexpensive
catalysts,
catalytic
methodologies
that
allow
their
seamless
solvent-free
recycling.
Water,
often
regarded
as
an
undesirable
pollutant
process,
progressively
emerging
helpful
reaction
component.
On
one
hand,
it
serves
hydrogen
bond
donor
(HBD)
enhance
performance
ionic
compounds;
on
other
aqueous
media
development
diverse
protocols
can
boost
or
ease
recycling
molecular
catalysts.
An
overview
advances
use
biphasic
systems
provided
work
along
with
recommendations
possible
future
developments.
Chemical Communications,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 25, 2024
Recent
works
on
practical
and
recyclable
catalysts
for
the
cycloaddition
of
CO
2
to
epoxides
are
reviewed
with
an
eye
use
inexpensive,
readily-available,
non-toxic
materials
future
emerging
designs.
Applied Organometallic Chemistry,
Journal Year:
2024,
Volume and Issue:
38(5)
Published: March 8, 2024
The
anthropogenic
carbon
dioxide
(CO
2
)
fixation
and
various
engineering
strategies
are
gaining
very
significant
attention
because
of
the
expansion
net‐zero
environment
in
atmosphere.
Herein,
we
designed
a
sodium
aluminate@γ‐alumina
(NaAlO
@γ‐Al
O
3
catalyst
by
simple
facile
precipitation
impregnation
tactics.
A
series
different
weight
percentage
NaAlO
materials
were
successfully
synthesized
well
characterized
using
advanced
analytical
spectroscopic
techniques
such
as
TGA,
XRD,
FE‐SEM,
TEM/HR‐TEM,
FT‐IR,
Raman,
TPD,
XPS
analysis.
was
employed
competent
for
CO
under
atmospheric
pressure
reaction
conditions.
catalytic
activity
results
evidently
revealed
that
cycloaddition
achieved
94%
styrene
oxide
conversion
93%
selectivity,
along
with
an
87%
yield
carbonate
at
120
°C
6
h.
Furthermore,
comprehensively
examined
effect
parameters
aluminate
amount,
co‐catalyst
temperature,
time
reaction.
Additionally,
terminal
internal
epoxides
tested
optimized
conditions
moderate
to
excellent
desired
cyclic
products.
Interestingly,
plausible
mechanism
proposed
synthesis
surface
support
characterization
experimental
results.
Remarkably,
could
be
easily
recoverable
recyclable
up
six
consecutive
cycles
without
declining
its
initial
stable
structural
physicochemical
properties.
ChemPlusChem,
Journal Year:
2023,
Volume and Issue:
88(7)
Published: June 21, 2023
The
utilization
of
CO2
as
building
block
for
the
production
cyclic
carbonate
is
a
promising
route
to
simultaneously
mitigate
global
warming
issue
and
obtain
valuable
commercial
chemicals.
In
this
work,
activity
nicotinamidium
halide
catalysts
towards
conversion
into
has
been
explored
by
means
density
functional
theory
(DFT)
calculations.
DFT
calculations
support
ability,
suggested
experimentally,
pyridium
α-C-H
proton
activate
epoxide
ring
via
hydrogen
bond.
Interestingly,
underline
involvement
n-octyl
substituent
pyridyl
in
activation,
while
atom
amide
group
N-H
rather
involved
stabilization
iodide
trough
electrostatic
interactions.
Moreover,
replacement
with
bulkier
methyl
leads
different
reaction
mechanism.
calculated
energy
barriers
well
reproduce
experimental
trends
studied
catalysts,
computed
activation
barrier
29.0
kcal/mol,
relative
opening
step
most
active
catalyst,
line
working
temperature
80
°C.
Those
results
shed
light
on
fixation
contributing
development
more
efficient
catalytic
systems.
Green Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
In
this
tutorial
review,
the
most
important
and
actual
issues
of
oleochemistry,
including
preparation
oleates
related
compounds
their
transformation
with
without
breaking
CC
bond,
are
addressed
discussed.
Catalysts,
Journal Year:
2023,
Volume and Issue:
13(8), P. 1214 - 1214
Published: Aug. 16, 2023
Development
of
an
effective
catalytic
system
for
the
cycloaddition
carbon
dioxide
to
epoxides
preparation
cyclic
carbonates
under
mild
conditions
is
great
importance.
Herein,
a
mixture
zinc
iodide,
metal
chlorides,
and
strong
organic
bases
demonstrated
be
useful
that
works
at
room
temperature
atmospheric
pressure.
The
most
efficient
combination,
iodide-niobium
chloride-7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene
(1.2-0.3-3.0
mol%),
gave
styrene
carbonate
(95%)
from
oxide
CO2
(balloon)
25
°C
24
h.
Another
iodide-zinc
chloride-1,8-diazabicyclo[5.4.0]undec-7-ene
(1.2-0.8-4.0
kept
activity
propylene
until
fourth
run.
Therefore,
reaction
was
operationally
simple,
highly
efficient,
proceeded
ambient
conditions.
catalyst
composed
readily
available
reagents
reusable.
Thus,
method
presented
powerful
tool
utilizing
as
starting
material
production
valuable
chemicals.
