ACS Applied Polymer Materials,
Journal Year:
2024,
Volume and Issue:
6(21), P. 13077 - 13088
Published: Oct. 17, 2024
An
ultrahigh-strength
textile
fiber-supported
Schiff
base
copper
complex
PEEK-SB@Cu(II)
was
prepared
by
chloromethylation
and
amination
of
a
commercially
available
poly(ether
ether
ketone)
(PEEK)
fiber,
followed
functionalization
acetate
chelation
treatment.
The
fibers
derived
from
the
preparation
stages
catalytic
runs
were
characterized
using
diverse
techniques
to
investigate
these
changes.
Moreover,
incorporated
with
NaBH4
presented
effective
photocatalytic
activities
for
fast
exhaustive
degradation
methyl
orange
in
an
aqueous
solution
rate
>99%
no
more
than
2
min.
corresponding
influencing
factors
screened
confirm
that
process
based
on
pseudo-first-order
reaction
kinetic
mode,
synergistic
mechanism
proposed
interpret
process.
Furthermore,
recyclability
stability
evaluated
over
5
long-term
storage
at
least
months,
practicability
this
methodology
spinning
basket
reactor
further
verified.
Nanoscale Advances,
Journal Year:
2024,
Volume and Issue:
6(7), P. 1932 - 1944
Published: Jan. 1, 2024
Inexpensive,
stable,
selective,
and
recyclable
nanocatalysts,
waste
regeneration,
utilization
of
safe
available
solvents
are
interest
important
factors
in
laboratory
science
industrial
applications
green
chemistry.
Therefore,
herein,
biochar
nanoparticles
(BNPs)
were
synthesized
through
chicken
manure
pyrolysis
as
a
novel
method
for
recycling.
Then,
order
to
improve
their
recyclability,
the
obtained
BNPs
magnetized
using
magnetic
nickel
nanoparticles.
surface
(BMNPs)
was
modified
by
(3-chloropropyl)trimethoxysilane
(3-CPTMS)
further
neodymium
Schiff-base
complex
immobilized
on
BMNPs,
denoted
Nd-Schiff-base@BMNPs.
The
supported
used
practical,
biocompatible,
commercial,
reusable
heterogeneous
nanocatalyst.
support
this
nanocatalyst
formed
from
manure;
therefore,
it
is
cheap,
economically
viable,
also
compatible
with
principles
Nd-Schiff-base@BMNPs
acts
selectively
organic
reactions
can
easily
be
recovered
an
external
magnet
reused,
which
This
characterized
wavelength-dispersive
X-ray
spectroscopy
(WDX),
scanning
electron
microscopy
(SEM),
energy-dispersive
(EDS),
thermogravimetric
analysis
(TGA),
Fourier
transform
infrared
(FT-IR),
inductively
coupled
plasma
(ICP),
N
Langmuir,
Journal Year:
2024,
Volume and Issue:
40(26), P. 13397 - 13411
Published: June 20, 2024
Herein,
we
present
a
highly
efficient
dual-functionalized
acid–base
nanocatalyst,
denoted
as
Fe3O4@GLYMO-HEPES,
featuring
sulfuric
acid
and
tertiary
amines
its
dual
functional
components.
This
catalyst
is
synthesized
through
the
immobilization
of
4-(2-hydroxyethyl)-1-piperazineethanesulfonic
(HEPES)
source
these
functionalities
onto
magnetite
(Fe3O4)
using
3-glycidoxypropyltriethoxysilane
(GLYMO)
linker.
Characterization
studies
confirm
integrity
Fe3O4
core,
with
GLYMO-HEPES
coating
exhibiting
no
phase
changes.
Furthermore,
Fe3O4@GLYMO-HEPES
nanoparticles
demonstrate
uniform
size
distribution
without
aggregation.
Notably,
exhibits
remarkable
stability
up
to
200
°C
possesses
saturation
magnetization
value
31.5
emu/g,
facilitating
easy
recovery
via
magnetic
separation.
These
findings
underscore
potential
versatile
recyclable
nanocatalyst
for
various
applications.
Its
catalytic
ability
was
evaluated
in
synthesis
pyrano[2,3-c]pyrazoles
2-amino-3-cyano-4H-chromenes
tandem
Knorr–Knoevenagel–Michael–Thorpe–Ziegler-type
heterocyclization
mechanism,
different
aldehydes.
A
wide
range
fused
heterocycles
having
good
excellent
yields.
The
process
cost-effective,
safe,
sustainable,
scalable,
can
be
reused
five
times.
prepared
found
stable
heterogeneous
showed
recyclability.
ACS Applied Nano Materials,
Journal Year:
2023,
Volume and Issue:
7(1), P. 1265 - 1277
Published: Dec. 22, 2023
Herein,
the
l-serine-functionalized
metal–organic
framework
nanostructure
is
obtained
via
a
simple
two-step
post-synthetic
modification
strategy.
Interesting
properties
of
serine,
such
as
existence
both
acidic
and
basic
groups,
provide
amphoteric
active
sites
on
UiO-66-NH2
that
are
not
accessible
through
direct
synthesis.
In
this
sense,
an
excess
amount
1,6
hexamethylene
diisocyanate
primarily
used
linker
to
allow
conversion
nucleophilic
groups
in
isocyanate
suitable
electrophile
group.
l-serine
reacted
with
generate
corresponding
urea
derivative.
SEM,
TEM,
nitrogen
adsorption
analyses
confirm
average
particle
size
approximately
24
nm
pore
6.68
within
framework.
Notably,
synthesized
nanomaterial
exhibited
high
catalytic
activity,
stability,
durability
solvent-free
procedures
synthesizing
diverse
range
4H-pyrano[2,3-b]
pyridine-3,6-dicarbonitriles
octahydropyrimido
[4,5
b][1,8]naphthyridine-7-carbonitriles.
Moreover,
catalyst
was
easily
separated─indicating
substantial
decrease
activity
upon
five
consecutive
runs
reaction.
Nanoscale Advances,
Journal Year:
2023,
Volume and Issue:
5(23), P. 6594 - 6605
Published: Jan. 1, 2023
In
this
research,
a
novel
nanomagnetic
tetra-azamacrocyclic
Schiff
base
complex
of
copper(ii)
was
produced
via
post-synthetic
surface
modification
an
Fe3O4
by
silane-coupling
agent
that
contains
acetylacetone
functionalities
at
the
end
its
chain.
Moreover,
target
Cu
involves
tetradentate
ligand
obtained
from
template
reaction
with
o-phenylenediamine
and
Cu(NO3)2·3H2O.
Furthermore,
prepared
nominated
as
[Fe3O4@TAM-Schiff-base-Cu(II)].
The
Fourier-transform
infrared
(FT-IR)
analysis
indicates
presence
Schiff-base-Cu
in
catalyst.
X-ray
spectroscopy
(EDS)
TGA
reveal
approximately
6-7%
catalyst
comprises
hydrocarbon
moieties.
scanning
electron
microscope
(SEM)
transmission
microscopy
(TEM)
images
demonstrate
uniformly
shaped
particles,
nearly
spherical
nature,
sizes
ranging
9
to
18
nm.
[Fe3O4@TAM-Schiff-base-Cu(II)]
applied
for
click
synthesis
diverse
range
5-substituted-1H-tetrazoles
PEG-400
green
medium.
Regarding
electrical
properties
Cu(ii)
complex,
tetra-aza
(N4
donor)
macrocyclic
N-rich
reasonable
-
leading
excellent
capacity
catalyze
these
organic
transformations.
Finally,
high
magnetization
value
(44.92
emu
g-1)
enables
recycling
least
four
times
without
compromising
catalytic
efficiency.
Current Organic Chemistry,
Journal Year:
2024,
Volume and Issue:
28(10), P. 777 - 788
Published: March 19, 2024
Abstract:
In
this
study,
magnetic
hercynite
nanoparticles
(FeAl2O4,
MNPs)
were
functionalized
by
cheap
and
readily
available
tris(hydroxymethyl)aminomethane
(Tris)
as
an
organocatalyst.
Various
techniques,
including
Vibrating
Sample
Magnetometry
(VSM),
Energy
Dispersive
X-ray
Spectroscopy
(EDS),
Diffraction
(XRD),
Scanning
Electron
Microscopy
(SEM),
Thermogravimetric
Analysis
(TG)
employed
to
determine
the
morphology,
particle
size,
physical
properties,
properties
of
nanoparticles.
Additionally,
Fourier
transform
infrared
spectroscopy
(FT-IR)
techniques
used
investigate
presence
functional
group.
The
activity
new
catalyst
a
magnetically
recoverable
nanocatalyst
was
investigated
in
synthesis
oxygen
nitrogencontaining
heterocyclic
compounds.
Pyranoprazole
2-amino-4H-benzo[b]pyrans
compounds
synthesized
with
high
efficiency
short
time.
FeAl2O4@SiO2@Tris
can
be
separated
using
attraction
reused
up
5
consecutive
times
without
significant
decrease
yield
target
products
or
catalytic
activity.
