Angewandte Chemie,
Journal Year:
2023,
Volume and Issue:
135(29)
Published: May 17, 2023
Abstract
Polyethyleneimines
find
many
applications
in
products
such
as
detergents,
adhesives,
cosmetics,
and
for
processes
tissue
culture,
gene
therapy,
CO
2
capture.
The
current
state‐of‐the‐art
technology
the
production
of
branched
polyethyleneimines
involves
aziridine
feedstock
which
is
a
highly
toxic,
volatile
mutagenic
chemical
raises
significant
concern
to
human
health
environment.
We
report
here
novel
method
synthesis
polyethyleneimine
derivative
from
ethylene
glycol
ethylenediamine
are
much
safer,
environmentally
benign,
commercially
available
potentially
renewable
feedstock.
polymerisation
reaction
catalysed
by
complex
an
earth‐abundant
metal,
manganese
liberates
H
O
only
by‐product.
Our
mechanistic
studies
using
combination
DFT
computation
experiment
suggest
that
proceeds
formation
subsequent
hydrogenation
imine
intermediates.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(26)
Published: April 21, 2023
A
homogeneous
manganese-catalyzed
cross-coupling
of
two
secondary
alcohols
for
the
divergent
synthesis
γ-disubstituted
and
β-disubstituted
ketones
is
reported.
Employing
well-defined
Mn-MACHOPh
as
catalyst,
this
novel
protocol
has
a
broad
substrate
scope
with
good
functional
group
tolerance
affords
diverse
library
valuable
disubstituted
in
moderate
to
yields.
The
strong
influence
reaction
temperature
on
selective
formation
alcohol
products
was
theorized
preliminary
DFT
studies.
Studies
have
shown
that
Gibbs
free
energy
thermodynamically
more
favourable
than
corresponding
at
lower
temperature.
Inorganic Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 8, 2025
Urea
is
a
common
agricultural
fertilizer
and
industrial
raw
material,
but
at
present,
the
traditional
production
of
urea
energy-and
pollution-intensive.
Electrocatalytic
coupling
CO2
ubiquitous
nitrogen
sources
to
synthesize
considered
as
promising
alternative
method
requiring
high-performance
catalysts
boost
C–N
electrocatalysis
process.
Herein,
hydrogen-intercalated
Pd–Au
bimetallene
(PdAuHene)
was
prepared
by
three-step
used
for
electrosynthesis
from
NO3–
CO2,
deriving
an
optimum
Faradaic
efficiency
33.88%
yield
rate
6.68
mmol
g–1
h–1
applied
potential
−0.6
V
vs
RHE.
Detailed
material
characterizations
electrochemical
studies
reveal
that
metallene
structure
with
ultrathin
thickness
could
improve
atomic
utilization
precious
metal
atoms,
introduction
Au
H
atoms
adjust
electronic
Pd
regulate
evolution
pathway
key
N-/C-intermediates,
promote
form
urea.
Organic Chemistry Frontiers,
Journal Year:
2024,
Volume and Issue:
11(5), P. 1420 - 1429
Published: Jan. 1, 2024
A
practical
one-pot
Mn-catalyzed
tandem
dehydrogenative
condensation
coupling
of
alcohols
with
hydrazines
and
halides
to
form
ylidenehydrazines
via
an
acceptorless
strategy
is
reported.
We
report
here
a
method
for
making
polyesterether
from
ethylene
glycol.
The
reaction
is
catalyzed
by
ruthenium
complex
and
liberates
H2
gas
H2O
as
byproducts.
Mechanistic
studies
conducted
through
experiments
DFT
computations
suggest
that
the
chain
growth
of
polymerization
process
involves
both
dehydrogenation
dehydration
pathways
stemming
hemiacetal
intermediate,
leading
to
formation
esters
ethers,
respectively.
Investigations
into
other
diols
have
also
been
conducted,
showing
with
lower
number
carbons
between
alcohol
groups
(propylene
glycol,
glycerol,
1,3-propanediol)
lead
whereas
α,ω-diols
containing
higher
(1,6-hexanediol
1,10-decanediol)
polyester.
ACS Catalysis,
Journal Year:
2025,
Volume and Issue:
15(5), P. 3619 - 3635
Published: Feb. 13, 2025
This
article
gives
a
perspective
on
various
types
of
catalytic
dehydrogenative
polymerization
reactions
(including
organic
and
main
group
polymers)
while
introducing
"hydrogen-borrowing
polymerization"
"acceptorless
to
this
class.
Limitations
future
opportunities
each
method
have
been
discussed.
ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 14, 2025
Electrochemical
urea
synthesis
via
the
coreduction
of
CO2
and
NO3-
is
a
sustainable
alternative
to
traditional
Bosch-Meiser
process.
However,
sluggish
reaction
kinetics
usually
result
in
low
efficiency.
Herein,
we
designed
kind
quaternary
PdCuCoZn
medium-entropy
alloy
(MEA)
metallene
for
highly
selective
electrosynthesis.
The
random
occupation
Cu,
Co,
Zn
with
lower
electronegativity
face-centered
cubic
lattice
Pd-based
enables
abundant
electron
donation
from
transition
metals
adjacent
Pd
atoms,
leading
formation
charge-polarized
Pdδ--Cu/Co/Znδ+
sites.
Considering
that
pivotal
C-
N-intermediates,
namely,
*CO
*NH2,
are
electrophilic
nucleophilic,
respectively,
such
strong
charge
polarization
would
greatly
benefit
their
respective
stabilization.
stable
adsorption
bonded
electron-rich
sites
*NH2
electron-deficient
Cu/Co/Zn-based
demonstrated
by
combination
situ
characterizations
theoretical
calculations.
proof-of-concept
MEA
achieves
maximum
yield
rate
1840
μg
h-1
mg-1
high
Faradaic
efficiency
70.2%,
surpassing
most
reported
state-of-the-arts.
Our
strategy
proposed
this
work
believed
enlighten
design
an
effective
catalyst
used
multistep
reactions.
