Scientific Reports,
Journal Year:
2022,
Volume and Issue:
12(1)
Published: Oct. 28, 2022
Abstract
In
this
work,
a
new
periodic
mesoporous
organosilica
with
urea-bridges
produced
by
the
reaction
of
(3-aminopropyl)triethoxysilane
and
toluene-2,4-diisocyanate
(APS-TDU-PMO)
is
introduced.
The
obtained
APS-TDU-PMO
was
found
to
be
an
appropriate
support
for
loading
Cu(II)
nanoparticles
afford
supramolecular
Cu@APS-TDU-PMO
nanocomposite.
Uniformity
mesoporosity
both
synthesized
nanomaterials
including
were
proved
different
spectroscopic,
microscopic
or
analytical
techniques
FTIR,
EDX,
XRD,
FESEM,
TEM,
BET,
TGA
DTA.
Furthermore,
prepared
nanomaterial
also
used,
as
heterogeneous
recyclable
catalyst,
synthesis
tetrazole
derivatives
through
cascade
condensation,
concerted
cycloaddition
tautomerization
reactions.
Indeed,
main
advantages
its
simple
preparation
high
catalytic
activity
well
proper
surface
area
which
enable
it
work
under
solvent-free
conditions.
Also,
introduced
catalyst
showed
good
stability
reusability
six
consecutive
runs
address
more
green
chemistry
principles.
ACS Omega,
Journal Year:
2024,
Volume and Issue:
9(26), P. 28114 - 28128
Published: June 21, 2024
The
present
work
aims
at
preparing
the
EDTA–Zn(II)
complex─supported
on
amine-functionalized
MIL-101(Cr)
MOF─as
a
new
and
effective
heterogenized
catalyst.
optimization
of
hydrothermal
process
shows
that
120
°C
is
best
condition
to
grow
MIL-101(Cr)–NH2
MOF
crystals.
Moreover,
regarding
use
postsynthetic
modification
(PSM)
method,
hexadentate
EDTA
was
grafted
this
support
via
simple
aminolysis
before
further
coordinating
it
with
Zn
ions
create
corresponding
Zn(II)
catalytic
complex.
activity
compound
then
investigated
in
context
one-pot
synthesis
polyhydroquinolines.
This
approach
has
number
advantages
including
following:
solvent
not
hazardous,
applying
porous
catalyst
inexpensive,
secure,
recyclable;
rapid
reaction
times,
high
levels
efficiency,
simplicity
separation.
Accordingly,
question
can
be
given
label
"green
chemistry".
Applied Organometallic Chemistry,
Journal Year:
2022,
Volume and Issue:
36(6)
Published: March 1, 2022
Abstract
A
highly
stable
and
efficient
heterogeneous
catalyst
was
successfully
prepared
by
hydrothermal
reaction
of
Zinc
nitrate
with
citric
acid.
To
produce
a
novel
Zn‐based
MOF
catalyst,
Zn
ions
were
coordinated
the
ligand
functional
groups
that
can
be
regarded
as
an
alpha‐hydroxy
acid
containing
three
carboxylic
acids
(COOH)
one
hydroxyl
(OH)
group
attached
to
three‐carbon
skeleton.
It
found
Zn‐CA‐MOFs
compound
participate
in
synthesis
5‐substituted
1H‐tetrazole
pyranopyrazole
molecules,
selectively
efficiently
high
yield
short
period
time.
As
presented,
demonstrates
excellent
reusability
stability
recycled
up
five
times
without
significant
loss
reactivity.
Heterogeneity
analysis
showed
no
leaching
active
species
occurred
during
recycling
process
Zn‐CA‐MOFs.
RSC Advances,
Journal Year:
2022,
Volume and Issue:
12(40), P. 26023 - 26041
Published: Jan. 1, 2022
Herein,
we
delignated
the
synthesis
of
a
novel
inorganic
sulfurous
magnetic
solid
acid
catalyst
by
immobilization
an
extremely
high
content
sulfuric
functionalities
on
amorphous
silica-modified
hercynite
nanomagnetic
core-shell
via
simple
method.
Silica
(SSA)
modified
nanocomposite
(hercynite@SSA)
combines
excellent
recoverability
and
stability
characteristics
(which
can
be
regarded
as
ferro
spinel
with
Fd3m
space
group
cubic
crystal
structure)
strong
Brønsted
properties
-SO3H
groups.
This
was
found
to
efficient
facile
for
bis(pyrazolyl)methanes
two
different
one-pot
multicomponent
methodologies
under
green
conditions.
The
hercynite@SSA
shows
catalytic
activity
reusability
in
ethanolic
medium
among
materials.
A
plausible
reaction
mechanism
is
proposed
this
synthesis.
Scientific Reports,
Journal Year:
2022,
Volume and Issue:
12(1)
Published: July 13, 2022
The
magnetic
nanoparticles
of
Fe3O4
were
synthesized
through
a
solid-state
reaction
hydrated
iron
(III)
chloride,
(II)
chloride
and
NaOH,
then
purified
by
calcination
at
high
temperature.
In
order
to
protect
ferrite
from
oxidation
agglomeration,
manufacture
novel
catalytic
system
anchored
copper
on
the
substrate,
was
core-shelled
adding
tetraethyl
orthosilicate.
Next,
prepared
Fe3O4@SiO2
supported
phosphomolybdic
acid
(PMA)
as
second
layer
nanocomposite
80
°C
in
30
h.
Eventually,
new
Fe3O4@SiO2-PMA-Cu
successfully
solution
solid
potassium
borohydride.
structure
nanocatalyst
acknowledged
different
techniques
such
EDS,
VSM,
XRD,
TEM,
FT-IR,
XPS,
TGA,
BET
FESEM.
synthesis
β-thiolo/benzyl-1,2,3-triazoles
various
thiiranes,
terminal
alkynes
sodium
azide
catalyzed
aqueous
medium.
obtain
optimum
condition,
effects
time,
temperature,
catalyst
amount
solvent
gauged.
recycled
used
for
several
consecutive
runs
without
any
loss
activity.
Applied Organometallic Chemistry,
Journal Year:
2022,
Volume and Issue:
36(12)
Published: Sept. 24, 2022
The
present
study
is
the
first
report
on
synthesis
and
catalytic
performance
of
Hercynite
nanoparticles
capped
with
a
novel
Schiff
base–manganese(II)
complex
brought
from
synthetic
procedure.
solid
support
catalyst
were
characterized
using
various
analytical
techniques.
characterization
results
suggest
excellent
dispersibility,
stability,
high
Mn
content
under
surface,
small
size
catalyst,
which
leads
to
activity
selectivity.
Moreover,
proved
be
sustainable
recyclable
for
rapid
chromene‐
pyran‐annulated
heterocycles
ambient
conditions.
effect
crucial
parameters
was
investigated
optimized.
scope
reaction
extended
aryl
aldehydes
keto–enol
tautomeric
pairs
(2‐hydroxy‐1,4‐naphthoquinone
or
dimedone),
corresponding
2‐amino‐3‐cyano‐4
H
‐chromene
‐pyran
products
obtained
yield
(82–99%)
at
low
time
(10–115
min).
Significantly,
indicated
magnetic,
cost‐effective,
nontoxic
properties,
result
in
having
recycling
efficiency
(5
cycles).
