European Journal of Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
27(23)
Published: July 30, 2024
Abstract
Chiral
lanthanide
clusters
have
promising
applications
in
chiral
recognition,
magneto‐optical
memories,
and
spintronic
devices.
Nonetheless,
the
precise
prediction
controlled
development
of
homochiral
polynuclear
Ln‐complexes
is
still
a
challenge.
Herein,
through
multidentate
chelate
synthetic
strategy,
new
hexagadolinium
phosphonate
cluster
designated
as
R/S
‐[Gd
6
(pmhpH)
8
(NO
3
)
2
(H
O)
]⋅19H
O
(
‐1
was
successfully
obtained
by
reacting
phosphonomethylhomoproline(pmhpH
with
Gd(III)
salt.
The
cluster,
shaped
like
lantern,
constructed
from
{GdO
}
polyhedra
{PO
C}
tetrahedra
surrounded
eight
pmhpH
2−
ligands.
Within
structure,
two
types
gadolinium
ions
different
coordination
modes
are
observed.
Each
ion
bound
to
carboxylate
oxygens
six
coordinated
Circular
dichroism
spectra
comfirmed
that
R
/
S
exists
pair
enantiomers.
Moreover,
exhibits
high
thermal
stability,
decomposing
at
temperatures
exceeding
335
°C.
Notably,
materials
can
be
used
for
enantiomeric
recognition
tryptophan
(Trp)
differential
pulse
voltammetry
(DPV)
peak
current
ratio
(I
D
/I
L
2.74.
Besides,
magnetic
measurements
revealed
compound
good
magnetocaloric
effect
(MCE)
maximum
entropy
change
−ΔSm
max
=36.84
Jkg
−1
K
T
=2
Δ
H
=7
T.
Nano-Micro Letters,
Journal Year:
2025,
Volume and Issue:
17(1)
Published: Feb. 6, 2025
Abstract
The
construction
of
carbon
nanocoil
(CNC)-based
chiral-dielectric-magnetic
trinity
composites
is
considered
as
a
promising
approach
to
achieve
excellent
low-frequency
microwave
absorption.
However,
it
still
challenging
further
enhance
the
low
frequency
absorption
and
elucidate
related
loss
mechanisms.
Herein,
chiral
CNCs
are
first
synthesized
on
three-dimensional
(3D)
foam
then
combined
with
FeNi/NiFe
2
O
4
nanoparticles
form
novel
foam.
3D
porous
CNC-carbon
network
provides
impedance
matching
strong
conduction
loss.
formation
FeNi-carbon
interfaces
induces
interfacial
polarization
loss,
which
confirmed
by
density
functional
theory
calculations.
Further
permeability
analysis
micromagnetic
simulation
indicate
that
nanoscale
magnetic
heterostructures
pinning
coupling
effects,
anisotropy
capability.
Owing
synergistic
effect
between
dielectricity,
chirality,
magnetism,
composite
exhibits
performance
an
ultrabroad
effective
bandwidth
(EAB)
14
GHz
minimum
reflection
less
than
−
50
dB.
More
importantly,
C-band
EAB
extended
GHz,
achieving
full
coverage.
This
study
guidelines
for
microstructure
design
broadband
Small Methods,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 28, 2024
Abstract
MXenes
are
2D
materials
known
for
their
unique
electromagnetic
wave
absorption
(EMWA)
properties
arising
from
varied
composition
and
structure.
In
this
study,
a
one‐step
ice‐assisted
process
is
utilized
to
directly
transform
MXene
into
3D
single‐layer
aerogels
(SMAs).
Furthermore,
the
interlayer
spacing
of
SMAs
optimized
by
incorporating
helical
carbon
nanotubes
(HCNTs).
Because
van
der
Waals
interaction
between
nanosheets
HCNTs,
assembled
HCNT@MXene
(HMAs)
exhibited
regular
porous
structure
moderate
conductivity,
leading
significantly
enhanced
responses,
as
demonstrated
finite
element
simulation.
The
HMAs
showed
an
exceptional
EMWA,
with
minimum
reflection
loss
−51.45
dB
effective
bandwidth
6.48
GHz
at
3.0
wt.%
filler
ratio.
Additionally,
visualization
surface
charge
distribution
power
density
characteristics
clarified
underlying
EMWA
mechanisms.
By
employing
hollow
gradient
metamaterial
design,
further
expanded
13.98
GHz.
maximum
radar
cross‐section
reduction
values
27.08
m
2
.
Moreover,
excellent
thermal
insulation
capability.
This
paper
presents
straightforward
yet
method
fabricating
offers
valuable
insights
development
application
MXene‐aerogel‐based
EMW
absorbers.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 6, 2024
Abstract
The
exceptional
benefits
of
structural
defects
and
doped
atoms
in
carbon
network
regarding
electromagnetic
properties
inspire
the
design
advanced
carbon‐based
microwave
absorption
(MA)
materials.
However,
excessive
decline
physical
materials,
especially
their
conductivity.
Therefore,
it
is
a
great
challenge
to
balance
optimize
conductive
behavior
for
MA
spiral
nanocoil
(CNC),
with
coexisting
amorphous
polycrystalline
structures
moderate
conductivity,
has
significant
but
lacks
pores
atoms.
Herein,
parts
relatively
weak
C─C
bond
energies
are
preferentially
oxidized
at
500
°C
air
atmosphere
create
combine
O
bodies
CNCs.
Furthermore,
mechanism
prioritizing
formation
doping
over
discovered.
Benefiting
from
synergistic
interplay
dopants,
O‐enriched
porous
CNCs
demonstrate
enhanced
conduction
polarization
losses
than
pure
CNCs,
realizing
wide
effective
bandwidth
7.3
GHz
filling
ratio
only
3
wt.%.
Theoretical
calculations
further
support
these
experimental
results.
combination
may
serve
as
an
pathway
unlocking
tunable
dielectric
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 10, 2025
Abstract
The
rational
manipulation
of
interfacial
properties,
composition,
and
morphology
materials
has
emerged
as
an
effective
strategy
for
enhancing
their
microwave
absorption
performance.
crystal
phase
microstructure,
electromagnetic
properties
can
be
regulated
by
varying
the
thermal
treatment
temperature.
synergistic
integration
heterogeneous
interfaces,
magnetic
materials,
microstructures,
defect
engineering
helps
optimize
impedance
matching
enhance
polarization
losses.
Herein,
multi‐interface
core–shell
FeSiAl@MnO
x
@C
composites
with
various
morphologies
demonstrated
superior
A
minimum
reflection
loss
−56.3
dB
is
achieved
at
absorber
thickness
1.41
mm,
bandwidth
5.0
GHz
obtained
a
1.59
mm.
radar
cross‐section
reduction
value
reached
19.448
incidence
angle
0°.
excellent
performance
due
to
effect
significant
dielectric
losses
improved
matching.
This
study
establishes
foundation
designing
next‐generation
high‐performance
microwave‐absorbing
high
