Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 11, 2024
Abstract
Metal–organic
frameworks
(MOFs)
are
lagging
in
the
use
of
lithium‐ion
batteries
(LIBs),
ascribing
to
full
coordination
between
metal
nodes
and
organic
ligands,
a
large
extent.
By
integrating
modulator
into
ligand
with
missing
bridging
functionality,
this
study
elucidates
role
non‐bridging
defect
sites
MOFs
tailoring
lithium
storage
performance.
A
fully
bridged
pristine
MOF
(p‐MOF)
utilizing
meso‐tetra(4‐carboxylphenyl)
porphyrin
is
compared
modified
containing
defects
(d‐MOF)
introduced
by
homologous
ligand,
tris(4‐carboxyphenyl)
porphyrin.
Spectroscopic
cryogenic
low‐dose
electron
microscopy
techniques
verify
presence
d‐MOF
reveal
their
explicit
local
structure.
Density
functional
theory
calculations
show
significantly
enhanced
Li
+
adsorption
energies
reduced
migration
barriers
at
p‐MOF.
As
result,
exhibits
exceptional
performance,
achieving
high
capacity
761
mAh
g
−1
0.05
superior
rate
performance
203
5
,
which
substantially
outperform
This
highlights
potential
modulating
develop
high‐performance
LIBs.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 10, 2025
Abstract
Defect‐engineering‐involved
metal‐organic
frameworks
(MOFs)
have
been
highly
valued
in
many
fields
due
to
the
enhanced
porosity
and
abundant
active
sites,
but
how
systematic
modulation
on
deficiency
influencing
fluorescent
sensing
performance
is
still
its
infancy.
Here,
defect‐engineering
of
MOF‐525
used
modulate
exposure
zirconium
(Zr)
clusters
sieving
capability
inner
channels,
enabling
precise
phosphoryl
fluoride
nerve
agents
with
specific
chemical
activity
molecular
dimensions.
Controllable
defects
transformed
localized
emission
porphyrin
into
ligand‐metal
charge
transferring
(LMCT)
gradual
loss
ligand
molecules,
which
interrupted
upon
coordination
agents,
triggering
a
red
turn‐on
fluorescence.
Thus,
defective
60%
effectively
discriminates
(e.g.,
sarin,
soman)
from
similar
substances
tabun,
venomous
agent
X)
synergistic
effect
dimension.
It
exhibits
sensitive
(0.96
n
m
/3.8
ppb),
rapid
(<1
s)
response
toward
target
robust
environmental
interference
acidic,
humid
common
substances.
This
work
enhances
understanding
MOFs
correpsonding
luminescent
behavior,
paving
new
avenue
for
strategy
trace
real
vapor.
Deleted Journal,
Год журнала:
2024,
Номер
1(2), С. 181 - 206
Опубликована: Авг. 4, 2024
Abstract
Metal–organic
frameworks
(MOFs)
have
emerged
as
promising
materials
in
the
realm
of
electrocatalysis
due
to
their
high
surface
area,
tunable
porosity,
and
versatile
chemical
functionality.
However,
practical
application
has
been
hampered
by
inherent
limitations
such
low
electrical
conductivity
a
limited
number
active
metal
sites.
Researchers
addressed
these
challenges
through
various
strategies,
including
enhancing
incorporating
conductive
nanoparticles,
modifying
structure
composition
MOFs
replacing
nodes
functionalizing
linkers,
preparing
catalysts
thermal
processes
decarburization
conversion
into
oxides,
phosphides
(MPs),
sulfides
(MSs).
This
review
provided
comprehensive
summary
strategies
that
were
employed
enhance
electroactivity
for
improved
electrocatalytic
performance
recent
years.
It
also
explored
future
directions
potential
innovations
design
synthesis
MOF‐based
electrocatalysts,
offering
valuable
insights
advancing
sustainable
energy
technologies.
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 13, 2025
Metal-organic
framework
(MOF)
nanoparticles
have
attracted
widespread
attention
as
lubrication
additives
due
to
their
tunable
structures
and
surface
effects.
However,
solid
properties
been
rarely
explored.
This
work
introduces
the
positive
role
of
moisture
in
case
a
newly
described
Ti-based
MOF
(COK-47)
powder.
COK-47
achieves
an
8.5-fold
friction
reduction
compared
AISI
304
steel-on-steel
sliding
under
room
air.
In
addition,
maintains
similarly
low
coefficient
(0.1-0.2)
on
various
counterbodies,
including
Al2O3,
ZrO2,
SiC,
Si3N4.
Notably,
other
widely
studied
MOFs
(ZIF-8,
ZIF-67)
2D
materials
powder
(MXene,
TMD,
rGO),
exhibits
lowest
(≈0.1)
same
experimental
settings.
Raman
spectroscopy,
X-ray
diffraction,
photoelectron
energy
dispersive
scanning
electron
microscope,
transmission
microscopy
indicate
that
tribofilm
is
amorphous
film
obtained
by
hydrolysis
air
with
moisture.
Density
functional
theory
further
confirms
water
catalyzes
decomposition
COK-47,
crucial
step
forming
tribofilm.
study
demonstrates
idea
utilizing
water-assisted
mechanisms.
It
provides
new
insights
into
applications
tribology
highlights
interdisciplinary
contributions
mechanical
engineering
chemistry.
