Research Square (Research Square),
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 27, 2025
Abstract
The
corrosive
acidic
interfacial
microenvironment
caused
by
rapid
multistep
deprotonation
of
the
alkaline
oxygen
evolution
reaction
(OER)
in
industrial
high-current
water
electrolysis
is
one
key
problems
limiting
activity
and
stability.
Some
functional
anions
derived
from
electrocatalysis
exhibit
special
functionalities
modulating
catalytic
interface
microenvironment,
but
this
matter
has
not
received
adequate
attention
academic
discussions.
coordinated
squaric
acid
molecule
revealed
to
undergo
a
dissolve-reintercalation
process
OER,
leading
its
eventual
stabilization
within
Fe-doped
NiOOH
interlayer
form
(Sq2−)
(NiFe-SQ/NF-R).
This
intercalated
Sq2−
stabilizes
OH−
through
multiple
hydrogen
bond
interactions,
which
conducive
maintaining
high
alkalinity.
Hence,
acidification
prepared
NiFe-SQ/NF-R
OER
significantly
inhibited,
resulting
tenfold
increase
durability
(from
65
700
hours)
when
exposed
current
density
3.0
A
cm−
2,
as
opposed
traditional
NiFe-LDH/NF-R
materials.
anion
guarantees
enduring
performance
NiFe-derived
electrocatalyst
under
densities
controlling
Small,
Journal Year:
2024,
Volume and Issue:
20(25)
Published: Jan. 8, 2024
Abstract
Metal–organic
frameworks
(MOFs)
have
attracted
immense
attention
as
efficient
heterogeneous
catalysts
over
other
solid
catalysts,
however,
their
chemical
environment
instability
often
limits
catalytic
potential.
Herein,
utilizing
a
flexible
unexplored
tetra‐acid
ligand
and
employing
the
mixed
approach,
3D
interpenetrated
robust
framework
is
strategically
developed,
IITKGP‐51
(IITKGP
stands
for
Indian
Institute
of
Technology
Kharagpur),
which
retained
its
crystallinity
wide
range
pH
solution
(4–12).
Having
ample
open
metal
sites
(OMSs),
explored
catalyst
in
one‐pot
Hantzsch
condensation
reaction,
with
low
loading
broad
substrates.
The
synthesis
drug
molecules
remains
one
most
significant
emergent
areas
organic
medicinal
chemistry.
Considering
such
practical
utility,
biologically
important
Nemadipine
B
Nifedipine
(calcium
channel
protein
inhibitor)
are
synthesized
first
time
by
using
this
fully
characterized
via
SC‐XRD
spectroscopic
methods.
This
report
inaugurates
usage
MOF
material
molecules.
Inorganic Chemistry,
Journal Year:
2023,
Volume and Issue:
62(32), P. 12989 - 13000
Published: Aug. 2, 2023
Metal–organic
frameworks
(MOFs)
have
been
recognized
as
one
of
the
most
promising
porous
materials
and
offer
great
opportunities
for
rational
design
new
catalytic
solids
having
structural
diversity
functional
tunability.
Despite
numerous
inherent
merits,
their
chemical
environment
instability
limits
practical
usage
demands
further
exploration.
Herein,
by
employing
mixed-ligand
approach,
we
designed
developed
a
robust
3D
Co-MOF,
[Co2(μ2-O)(TDC)2(L)(H2O)2]·2DMF
(H2TDC
=
2,5-thiophenedicarboxylic
acid,
L
3,3′-azobispyridine),
IITKGP-50
(IITKGP
stands
Indian
Institute
Technology
Kharagpur),
which
exhibited
excellent
framework
robustness
not
only
in
water
but
also
wide
range
aqueous
pH
solutions
(pH
2–12).
Taking
advantage
superior
presence
high-density
open
metal
sites,
was
explored
catalyzing
two-component
Knoevenagel
condensation
reaction
three-component
Strecker
reactions.
Moreover,
to
verify
size
selectivity
IITKGP-50,
smaller
bulkier
substrates
comparison
with
MOF's
pore
cavity
(8.1
×
5.6
Å2)
were
employed,
relatively
lesser
conversions
sterically
aldehyde
derivatives
confirmed
that
cycle
occurs
inside
cavity.
The
easy
scalability,
lower
catalyst
loading
compared
benchmark
MOFs,
magnificent
conversion
rate
over
substrates,
recyclability
without
significant
performance
loss
made
heterogeneous
candidate.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 11, 2024
Membranes
with
switchable
wettability,
solvent
resistance,
and
toughness
have
emerged
as
promising
materials
for
separation
applications.
However,
challenges
like
limited
mechanical
strength,
poor
chemical
stability,
structural
defects
during
membrane
fabrication
hinder
their
widespread
adoption.
Covalent
organic
frameworks
(COFs),
crystalline
constructed
from
molecules
connected
by
covalent
bonds,
offer
a
solution
due
to
high
porosity,
customizable
properties.
The
ordered
structures
functionality
provide
COFs
lightweight
framework,
large
surface
area,
tunable
pore
sizes,
which
attracted
increasing
attention
applications
in
separations.
Recent
research
has
extensively
explored
the
preparation
strategies
of
COF
membranes
various
processes.
This
review
uniquely
delves
into
influence
techniques,
including
interfacial
polymerization,
layer-by-layer
assembly,
situ
growth,
on
thickness
performance.
It
comprehensively
explores
design
potential
these
methods,
particular
focus
gas
separation,
oil/water
nanofiltration.
Furthermore,
future
opportunities,
within
this
field,
directions
development
are
proposed.
Nature Communications,
Journal Year:
2025,
Volume and Issue:
16(1)
Published: Jan. 15, 2025
Separation
of
multi-component
mixtures
in
an
energy-efficient
manner
has
important
practical
impact
chemical
industry
but
is
highly
challenging.
Especially,
targeted
simultaneous
removal
multiple
impurities
to
purify
the
desired
product
one-step
separation
process
extremely
difficult
task.
We
introduced
a
pore
integration
strategy
modularizing
ordered
structures
with
specific
functions
for
on-demand
assembly
deal
complex
systems,
which
are
unattainable
by
each
individual
pore.
As
proof
concept,
two
ultramicroporous
nanocrystals
(one
C2H2-selective
and
other
CO2-selective)
as
shell
pores
were
respectively
grown
on
C2H6-selective
porous
material
core
Both
respective
pore-integrated
materials
show
excellent
ethylene
production
performance
dynamic
breakthrough
experiments
C2H2/C2H4/C2H6
CO2/C2H4/C2H6
gas
mixture,
even
better
than
that
from
traditional
tandem-packing
processes
originated
optimized
mass/heat
transfer.
Thermodynamic
simulation
results
explained
pre-designed
modules
can
perform
target
independently
materials.
Pore
offers
approach
assembling
demand
achieve
mixtures.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(24)
Published: April 11, 2023
The
ethanol/water
separation
challenge
highlights
the
adsorption
capacity/selectivity
trade-off
problem.
We
show
that
target
guest
can
serve
as
a
gating
component
of
host
to
block
undesired
guest,
giving
molecular
sieving
effect
for
adsorbent
possessing
large
pores.
Two
hydrophilic/water-stable
metal
azolate
frameworks
were
designed
compare
effects
and
pore-opening
flexibility.
Large
amounts
(up
28.7
mmol
g-1
)
ethanol
with
fuel-grade
(99.5
%+)
even
higher
purities
(99.9999
be
produced
in
single
process
from
not
only
95
:
5
but
also
10
90
mixtures.
More
interestingly,
pore
apertures
showed
high
water
capacity
exceptionally
water/ethanol
selectivity
characteristic
sieving.
Computational
simulations
demonstrated
critical
role
guest-anchoring
aperture
guest-dominated
process.
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
12(22)
Published: May 3, 2024
Abstract
It
is
necessary
to
develop
excellent
sensors
for
volatile
organic
compounds
(VOCs)
detection
from
the
perspective
of
environmental
protection
and
human
health.
Luminescent
lanthanide
metal‐organic
frameworks
(MOFs)
have
many
advantages
such
as
porosity,
luminescence,
structural
controllability,
making
them
very
suitable
luminescent
sensing
materials.
Based
on
a
functional
oriented
strategy,
novel
Ln‐MOFs
are
successfully
constructed
their
structure
properties
characterized
in
detail.
A
series
vapor
luminescence
tests
shown
that
Eu/Tb
doped
L1‐Eu
0.1
/Tb
0.9
not
only
exhibits
high
selectivity
alcohols,
especially
ethanol
vapor,
but
also
has
sensitivity
extremely
low
limit
(9.76
mg
L
−1
).
To
knowledge,
there
no
reports
ratio
based
those
with
performance.
Crystal
determination
demonstrates
binds
framework
through
multiple
hydrogen
bonding
interactions,
altering
energy
transfer
efficiency
between
Tb
3+
Eu
achieve
detection.
In
addition,
good
repeatability,
prepared
thin
film
material
portability
processability.
This
work
can
provide
some
experience
development
VOCs
materials
better
