Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 22, 2024
Abstract
The
liquefied
natural
gas
and
adsorbed
(LNG‐ANG)
coupling
systems
are
emerging
as
an
attractive
solution
to
solve
boil‐off
gases
generated
by
LNG
tanks.
Metal‐organic
frameworks
(MOFs)
promising
candidates
for
methane
storage
delivery
owing
their
high
porosity,
large
specific
surface
area,
tunable
pore
structures.
However,
systematically
tuning
LNG‐ANG‐related
adsorption
performance
of
MOFs
has
yet
be
explored.
In
this
context,
interpenetrated
zirconium‐based
(3,8)‐connected
the
‐MOF,
Zr‐TTB‐1,
with
limited
porosity
is
synthesized.
further
delicate
modulation
reaction
conditions
allows
assembly
a
non‐interpenetrated
counterpart,
Zr‐TTB‐2,
significantly
improved
porosity.
Such
molecular‐level
catenation
control
results
in
substantial
increase
low‐temperature
related
LNG‐ANG.
volumetric
working
capacity
Zr‐TTB‐2
up
255
cm
3
(standard
temperature
pressure,
STP)
−3
under
LNG‐ANG
condition
(159
K,
6
bar,
298
5
bar),
outperforms
more
than
twice
that
counterpart—Zr‐TTB‐1
(115
(STP)
).
To
end,
investigation
provides
efficacious
example
regulating
through
structural
designed
porous
frameworks.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 20, 2025
Adsorptive
separation
of
acetylene
(C2H2)
from
carbon
dioxide
(CO2)
offers
a
promising
approach
to
purify
C2H2
with
low-energy
footprints.
However,
the
development
ideal
adsorbents
simultaneous
high
adsorption
and
selectivity
remains
great
challenge
due
their
very
small
molecular
sizes
physical
properties.
Herein,
we
report
lithium(I)-chelation
strategy
for
pore
space
partition
(PSP)
in
microporous
MOF
(Li+@NOTT-101-(COOH)2)
achieve
uptake
selectivity.
The
chelation
model
Li+
ions
within
framework
was
visually
identified
by
single-crystal
X-ray
diffraction
studies.
immobilized
were
found
have
two
functions:
(1)
partitioning
large
cages
into
smaller
ones
while
maintaining
surface
area
(2)
providing
specific
binding
sites
selectively
take
up
over
CO2.
resulting
Li+@NOTT-101-(COOH)2
exhibits
rare
combination
capture
capacity
(205
cm3
g-1)
C2H2/CO2
(13)
at
ambient
conditions,
far
surpassing
that
NOTT-101-(COOH)2
(148
g-1
3.8,
respectively)
most
top-tier
materials
reported.
Theoretical
calculations
gas-loaded
SCXRD
studies
reveal
chelated
combined
segmented
can
bind
amount
through
unique
π-complexation,
accounting
improved
Breakthrough
experiments
validated
its
excellent
actual
mixtures,
one
highest
productivities
118.9
L
kg-1
(>99.5%
purity)
single
adsorption-desorption
cycle.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 5, 2024
Cyclohexane
(Cy),
commonly
produced
by
the
catalytic
hydrogenation
of
benzene
(Bz),
is
used
in
large
quantities
as
a
solvent
or
feedstock
for
nylon
polymers.
Removing
trace
unreacted
Bz
from
Cy
product
technically
difficult
due
to
their
similar
molecular
structures
and
physical
properties.
Herein,
we
report
that
metal-organic
framework
(MOF)
adsorbent
shows
sieving
effect
with
record-high
Bz/Cy
adsorption
selectivities
(216,
723,
1027)
liquid
mixtures
(v/v
=
1:1,
1:10,
1:20),
traps
molecules
effectively
even
at
low
partial
pressure
vapor
phase
(e.g.,
2.49
mmol/g
8.2
Pa)
content
liquid-phase
128
mg/g
20
ppm).
Over
99%
removal
(1000
ppm)
could
be
achieved
one
simple
stripping
step
room
temperature
using
this
sorbent,
producing
>99.999%
purity.
Single-crystal
structure
analyses
guest-free
Bz-loaded
phases
MOF
disclosed
narrow
slit-like
pore
aperture
strong
uniting
multiple
weak
host-guest
guest-guest
interactions
are
co-origin
its
distinct
property
Cy.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 12, 2025
Abstract
Developing
novel
nanoplatforms
capable
of
monitoring
drug
release
by
identifiable
magnetic
resonance
imaging
(MRI)
responses
is
a
great
promising
yet
challenging
task.
Here,
isoreticular
chemistry
strategy
introduced
to
enable
spn
‐type
metal–organic
framework
(MOF)
with
T
1
‐weighted
MRI
turned‐on
response
the
via
coordination‐dissociation
process.
Post‐synthetic
functionalization
endows
structure
high
longitudinal
relaxivity
r
12.63
m
−1
s
as
well
abundant
accessible
coordination
sites
catch
carboxylate
probes
and
drugs.
Mechanism
studies
reveal
size‐dependent
decrease
in
coordinated
increase
size,
bulk
benzoic
acid
showing
largest
reduction
at
71%.
In
vitro
model
further
validate
signals
respectively
coordinating
four
drugs
aromatic
groups.
Finally,
vivo
experiments
confirm
feasibility
using
this
coordination‐dissociation‐induced
monitor
release.
This
proof‐of‐principle
study
demonstrates
practical
pathway
for
designing
MOF‐based
responsive
MRI,
paving
way
enhanced
non‐invasive
techniques.