Chemistry,
Journal Year:
2024,
Volume and Issue:
6(5), P. 1271 - 1286
Published: Oct. 16, 2024
Small
bifunctional
molecules
are
attractive
for
use
as
models
in
different
areas
of
knowledge.
How
can
their
functional
groups
interact
solids?
This
is
important
to
know
the
prediction
physical
and
chemical
properties
materials
based
on
them.
In
this
study,
two
new
hydrogen-bonded
organic
frameworks
(HOFs)
sterically
demanding
molecular
compounds,
bis(1-hydroxy-2-methylpropane-2-aminium)
sulfate
(1)
2-methyl-4-oxopentan-2-aminium
hydrogen
ethanedioate
hydrate
(2),
were
synthesized
fully
characterized
by
means
FTIR
NMR
spectroscopies,
well
X-ray
powder
diffraction
thermogravimetric
analyses.
Their
crystal
structures
established
through
single-crystal
analysis.
It
was
shown
that
both
compounds
have
a
layered
structure
due
formation
2D
hydrogen-bonding
network,
layers
being
linked
systematically
arranged
Van
der
Waals
contacts
between
methyl
cations.
To
unveil
some
dependencies
nature
solid
structure,
Hirschfeld
surface
(HS)
analysis
carried
out
HOFs
1,
2,
known
congeners
1-hydroxy-2-methylpropan-2-aminium
hemicarbonate
(3)
(1-hydroxy-2-methylpropan-2-yl)
carbamate
(4).
HS
performed
quantify
visualize
close
intermolecular
atomic
structures.
clearly
seen
H–H
make
highest
contributions
amino
alcohol
3
4,
with
maximal
value
65.2%
compound
having
CO32−
counterion.
A
slightly
lower
contribution
(64.4%)
found
which
anionic
part
represented
1-hydroxy-2-methylpropan-2-yl
carbamate.
The
significant
moieties
presence
quaternary
carbon
atom
short
three-carbon
chain.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 26, 2025
Abstract
Research
over
the
years
has
revealed
immense
potential
of
metal–organic
frameworks
(MOFs)
for
purifying
olefins
such
as
ethylene
(C
2
H
4
)
and
propylene
3
6
).
However,
many
these
MOFs
face
challenges
in
terms
economic
viability,
particularly
production
scalability,
long‐term
stability,
process
capability.
In
this
study,
we
present
a
low‐cost
easily
scalable
synthesis
robust
MOF
material
(JNU‐74a),
featuring
balanced
surface
polarity
that
allows
one‐step
C
purification
from
methanol‐to‐olefin
(MTO)
products.
By
incorporating
highly
electronegative
atoms
on
nonpolar
surface,
JNU‐74a
exhibits
substantially
larger
absorption
capacity
stronger
binding
affinity
ethane
compared
to
,
evidenced
by
their
gas
adsorption
isotherms
heats
measurements.
In‐depth
analyses
through
situ
single‐crystal
X‐ray
diffraction
(SCXRD)
gas@JNU‐74a
unveil
multiple
supramolecular
bindings
favor
confirming
preferential
.
Breakthrough
experiments
demonstrate
can
efficiently
produce
polymer‐grade
(≥99.95%)
(≥99.5%)
/C
mixtures
different
ratios
single
adsorption‐desorption
cycle.
With
its
impressive
separation
capability,
high
chemical
cost‐effective
production,
holds
promise
olefin
MTO
products
other
challenging
industrial
separations.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 5, 2025
Abstract
The
gradual
separation
of
the
naphtha
steam
cracking
product
(propane/propylene/ethylene,
C
3
H
8
/C
6
2
4
)
to
obtain
highly
pure
is
great
significance
as
it
provides
an
alternative
process
for
this
important
industrial
feedstock.
However,
developing
adsorbents
meet
efficient
and
purification
application
remains
challenging.
A
water
coordination‐decorated
metal–organic
framework
(MOF,
Cd‐dtzip‐H
O)
material
reported.
Interestingly,
molecules
cooperate
with
build
a
vortex
significantly
affect
preferential
adsorption
.
At
298
K
100
kPa,
loading
in
112.0
cm
g
−1
,
equivalent
1.7
2.0
times
respectively.
Experimental
breakthroughs
show
that
efficiently
separates
under
different
pressures.
Meanwhile,
also
unprecedentedly
achieves
one‐step
mixtures
yielding
high‐purity
(99.9%)
(99.95%)
products
productivities
38.2
12.7
L
kg
