RSC Advances,
Год журнала:
2025,
Номер
15(23), С. 18535 - 18547
Опубликована: Янв. 1, 2025
This
study
reports
the
fabrication
and
characterization
of
a
novel
magnetic
Co-Ni/Fe3O4@mesoporous
silica
hollow
sphere
(Co-Ni/Fe3O4@MMSHS)
nanocomposite.
Then,
it
was
used
as
an
effective
nanocatalyst
to
efficiently
synthesize
tetrazoles
from
various
aromatic
nitriles
sodium
azide
through
[2
+
3]
cycloaddition
reaction.
provided
multi-step
process
involving
preparation
carbon
spheres,
their
magnetization
with
Fe3O4,
loading
cobalt
nickel
nanoparticles,
subsequent
coating
calcining
form
mesoporous
structure.
The
characterized
using
techniques,
including
FT-IR,
XRD,
FE-SEM,
EDS,
elemental
mapping,
BET,
VSM,
confirming
its
successful
synthesis
desired
properties.
catalytic
performance
Co-Ni/Fe3O4@MMSHS
evaluated
for
range
tetrazole
derivatives.
results
demonstrated
high
activity,
achieving
excellent
product
yields
(up
98%)
within
short
reaction
times
(8-44
minutes)
under
mild
conditions.
catalyst
recyclability
reusability,
making
environmentally
friendly
economically
viable
choice
synthesis.
emphasizes
potential
rationally
designed
nanocatalysts
efficient
sustainable
organic
transformations.
Physical Review Materials,
Год журнала:
2024,
Номер
8(5)
Опубликована: Май 20, 2024
In
organic
proton-transfer
ferroelectrics
(OPTFe),
molecules
are
linked
to
form
hydrogen-bonded
networks,
and
proton
transfer
(PT)
between
is
the
dominant
mechanism
of
ferroelectric
switching.
The
fast-switching
frequencies
OPTFes
make
them
attractive
alternatives
conventional
ceramic
ferroelectrics,
which
contain
rare
and/or
toxic
elements
require
high
processing
temperatures.
this
study,
we
mined
Cambridge
Structural
Database
(CSD)
for
potential
OPTFes,
uncovering
most
previously
reported
ones,
both
tautomeric
compounds
acid-base
salts,
in
addition
12
new
compounds,
nine
were
salts.
identification
PT
salts
highlights
a
avenue
engineering
novel
OPTFes.
CSD
mining
was
based
on
identifying
polar
crystal
structures
with
pseudoinversion
symmetry
viable
paths.
spontaneous
polarization
${\mathbit{P}}_{\mathrm{s}}$
barriers
${U}_{\mathrm{PT}}$
calculated
selection
using
density-functional
theory.
Scientific Reports,
Год журнала:
2022,
Номер
12(1)
Опубликована: Окт. 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.
Organics,
Год журнала:
2024,
Номер
5(4), С. 575 - 597
Опубликована: Дек. 5, 2024
Pyrazole
and
tetrazole
are
among
the
most
important
heterocyclic
members
of
azole
family.
Over
past
decade,
these
N-heterocycles
their
derivatives
have
demonstrated
specific
properties
that
give
them
potent
applications
in
several
fields
such
as
pharmacology,
technology,
agriculture.
Combining
two
azoles
single
hybrid
architecture
has
given
rise
to
highly
molecules
terms
efficacy
specificity,
with
enhanced
scalable
properties.
In
this
context,
present
paper
deals
literature
last
10
years
describing
synthesis
protocols
for
pyrazole-tetrazole-based
molecules.
Their
biological
activities
well
energetic
also
reported.
