Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 4, 2025
Sodium-ion
batteries
(SIBs)
attract
significant
attention
due
to
their
potential
as
an
alternative
energy
storage
solution,
yet
challenges
persist
the
limited
density
of
existing
cathode
materials.
In
principle,
redox-active
organic
materials
can
tackle
this
challenge
because
high
theoretical
densities.
However,
electrode-level
densities
electrodes
are
compromised
poor
electron/ion
transport
and
severe
dissolution.
Here,
we
report
use
a
low-bandgap,
conductive,
highly
insoluble
layered
metal-free
material
for
SIBs.
It
exhibits
capacity
355
mAh
g–1
per
formula
unit,
enabled
by
four-electron
redox
process,
achieves
606
Wh
kg–1electrode
(90
wt
%
active
material)
along
with
excellent
cycling
stability.
allows
facile
two-dimensional
Na+
diffusion,
which
enables
intrinsic
rate
capability.
Growth
in
presence
little
2
carboxyl-functionalized
carbon
nanotubes
improves
charge
transfer
kinetics
further
enhances
power
performance.
Altogether,
these
allow
construction
SIB
cells
built
from
affordable,
sustainable
small
molecule,
provide
472
when
charging/discharging
90
s
top
specific
31.6
kW
kg–1electrode.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(19)
Опубликована: Март 19, 2024
Abstract
The
nature
of
protecting
group
chemistry
necessitates
a
deprotection
step
to
restore
the
initially
blocked
functionality
prior
further
transformation.
As
this
aspect
manipulation
inevitably
adds
count
any
synthetic
sequence,
development
methods
enabling
simultaneous
and
functionalization
(“deprotective
functionalization”—distinct
from
“deprotection
followed
by
functionalization”)
is
appealing,
as
it
has
potential
improve
efficiency
streamline
routes.
Herein,
we
report
deprotective
newly
introduced
Nms‐amides
guided
density
functional
theory
(DFT)
analysis,
which
exploits
inherent
Nms
reactivity.
Mechanistic
studies
substantiate
help
rationalize
exquisite
reactivity
Nms‐amides,
other
commonly
used
groups
are
shown
not
exhibit
same
patterns.
practicality
approach
was
ultimately
demonstrated
in
selected
case
studies.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 20, 2024
The
dehydrogenative
coupling
of
alcohols
and
amines
to
form
amide
bonds
is
typically
catalysed
by
homogeneous
transition
metal
catalysts
at
high
temperatures
ranging
from
130-140
°C.
In
our
pursuit
an
efficient
recyclable
photocatalyst
capable
conducting
this
transformation
room
temperature,
we
report
herein
a
COF-mediated
synthesis.
TTT-DHTD
COF
was
strategically
designed
incorporate
density
functional
units,
specifically
dithiophenedione,
trap
photogenerated
electrons
effectively
facilitate
hydrogen
atom
abstraction
reactions.
photoactive
COF,
synthesized
using
solvothermal
methods
showed
crystallinity
moderate
surface
area,
providing
ideal
platform
for
heterogeneous
Light
absorption
the
across
entire
visible
range,
narrow
band
gap,
valence
position
make
it
well-suited
generation
excitons
necessary
targeted
dehydrogenation.
Utilizing
red
light
irradiation
employing
extremely
low
loading
have
successfully
prepared
wide
range
amides,
including
challenging
secondary
in
good
excellent
yields.
substrates'
group
tolerance,
very
mild
reaction
conditions,
catalyst's
significant
recyclability
represent
substantial
advancements
over
prior
methodologies.
Organic & Biomolecular Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
We
have
developed
an
efficient
solvent-free
protocol
for
amide
bond
formation
using
Boc
2
O/DMAP,
involving
the
in
situ
generation
of
a
mixed
anhydride
and
proceeding
via
sequential
mechanism.
ACS Omega,
Год журнала:
2025,
Номер
10(10), С. 10579 - 10593
Опубликована: Март 3, 2025
The
NHC-Se
scaffold
has
emerged
as
an
intriguing
target,
opening
new
avenues
for
discovering
compounds
that
could
significantly
improve
public
health.
Recently,
extensive
efforts
have
been
made
to
synthesize
NHC-Se-based
organic
various
biomedical
applications.
Herein,
we
disclose
a
straightforward
method
access
series
of
N-heterocyclic
carbene
(NHC)-derived
organoselenium
molecules
functionalized
with
amide
moiety.
parent
adduct
pendent
ester
moiety
is
sufficiently
activated
facilitate
base-
and
additive-free
ester-to-amide
bond
transformation.
Furthermore,
the
use
PEG
3550,
biocompatible
solvent,
enhances
reaction
efficiency
simplifies
workup.
This
approach
employs
broad
spectrum
aliphatic
amines
good
functional
group
tolerance,
offering
versatile
ecofriendly
extending
chemical
space
around
compounds.
Additionally,
density
theory
(DFT)
calculations
provide
insights
into
electronic
properties,
stability,
reactivity
profiles
synthesized
compounds,
suggesting
their
promising
potential
applications
in
fields.
Journal of Flow Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 12, 2025
Abstract
We
report
the
development
of
simple
solution-phase
flow
conditions
for
scalable
synthesis
peptides
using
in-situ
activation
as
mixed
anhydrides,
contributing
to
synthetic
toolbox
available
reactions.
This
approach
has
been
used
preparation
a
series
diverse
dipeptides
in
plug
flow,
and
then
continuous
(<
10
mmol)
were
developed
applied
gram
scale
hexapeptide
linear
precursor
bioactive
cyclic
peptide
segetalin
A
further
proof
utility
this
approach.
Graphical
RSC Advances,
Год журнала:
2025,
Номер
15(11), С. 8195 - 8206
Опубликована: Янв. 1, 2025
This
study
documented
the
hydrolysis
of
nitriles
by
copper(
i
)
oxide
immobilized
on
nitrogen-doped
carbon
nanotubes
(N-CNT/Fe
3
O
4
–Cu
2
O)
to
yield
corresponding
amides
in
presence
a
deep
eutectic
solvent
(ChOH/Gly).
