Crystal Growth & Design,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 8, 2024
Considering
that
the
greenhouse
effect
is
most
concerning
environmental
issue
globally,
selective
capture
and
resource
utilization
of
CO2
have
attracted
widespread
attention.
Herein,
we
report
a
highly
robust
thulium(III)–organic
framework
{[Tm2(μ2-OH)(CPPDDA)(H2O)2]·3DMF·2H2O}n
(NUC-108),
which
obtained
from
exquisite
combination
undocumented
multifunctional
clusters
[Tm4(μ2-OH)2(COO)10(H2O)4]
organic
ligands
4,4′-(4-(4-carboxyphenyl)pyridine-2,6-diyl)diisophthalic
acid
(H5CPPDDA).
NUC-108
possesses
following
unique
merits:
(i)
functional
tetranuclear
rare-earth
serve
as
nodes,
in
Tm3+
ions
can
be
activated
Lewis
sites
μ2-OH
anions
are
base
sites;
(ii)
high-porosity
zeolite
architecture
contains
three
kinds
channels:
12.29
×
9.74
Å2
8.92
4.97
along
b
axis
12.76
8.95
c
axis;
(iii)
uncoordinated
pyridine
moieties
further
endow
host
with
functionality;
(iv)
resistance
to
weak
acidic
alkaline
aqueous
solutions
well
various
solvents.
Notably,
NUC-108a
effectively
separate
binary
CO2/CH4
mixture
high
adsorption
selectivity,
should
due
enough
basic
groups
moieties.
Furthermore,
under
mild
conditions
without
any
solvent,
also
used
an
effective
recoverable
catalyst
facilitate
cycloaddition
epoxides
aid
tetrabutylammonium
bromide.
Hence,
these
findings
beneficial
for
guiding
development
stable
active
catalysts
carbon
utilization.
Crystal Growth & Design,
Год журнала:
2024,
Номер
24(8), С. 3473 - 3482
Опубликована: Апрель 8, 2024
Adjusting
the
Lewis
acid–base
sites
in
MOF-based
catalysts
to
meet
demand
for
catalytic
CO2
chemical
fixation
is
a
huge
challenge.
Herein,
highly
robust
rectilinear
{Zn3}-based
metal–organic
framework
of
{[Zn3(TNTNB)2(4,4′-bip)(H2O)2]·5DMF·9H2O}n
(NUC-80)
was
generalized
from
solvothermal
condition
(H3TNTNB
=
1,3,5-tri(3-nitro-4-carboxyphenyl)-2,4,6-trinitrobenzene,
4,4′-bip
4,4′-bipyridine).
Activated
NUC-80a
not
only
owns
large
void
volume
(58%)
and
two
kinds
solvent-accessible
channels:
rhombic-like
(ca.
14.24
×
14.57
Å)
along
axis
rectangular-like
11.72
14.48
b
axis,
but
also
functionalized
by
rich
metal
plentiful
nitro
groups
on
its
inner
surface.
Performed
experiments
confirmed
that
could
efficiently
catalyze
cycloaddition
reaction
with
epoxides
Knoevenagel
condensations
aldehydes
malononitrile
under
mild
conditions
high
turnover
frequency
(TOF).
Hence,
this
work
provides
nitro-functionalized
cluster-based
nanoporous
wide
range
potential
applications
such
as
catalysis,
gas
adsorption,
separation.
Inorganic Chemistry,
Год журнала:
2024,
Номер
63(30), С. 14183 - 14192
Опубликована: Июль 15, 2024
Developing
a
highly
active
catalyst
that
can
efficiently
capture
and
convert
carbon
dioxide
(CO2)
into
high-value-added
energy
materials
remains
severe
challenge,
which
inspires
us
to
explore
effective
metal–organic
frameworks
(MOFs)
with
high
chemical
stability
high-density
sites.
Herein,
we
report
robust
3D
lead(II)-organic
framework
of
{(Me2NH2)2[Pb5(PTTPA)2(H2O)3]·2DMF·3H2O}n
(NUC-111)
unreported
[Pb10(COO)22(H2O)6]
clusters
(abbreviated
as
{Pb10})
nodes
(H6PTTPA
=
4,4′,4″-(pyridine-2,4,6-triyl)triisophthalic
acid).
After
thermal
activation,
NUC-111a
is
functionalized
by
the
multifarious
symbiotic
acid–base
sites
open
Pb2+
uncoordinated
pyridine
groups
on
inner
surface
void
volume.
Gas
adsorption
tests
confirm
displays
higher
separation
performance
for
mixed
gases
f
CO2
CH4
selectivity
CO2/CH4
at
273
K
101
kPa
being
31
(1:99,
v/v),
23
(15:85,
8
(50:50,
respectively.
When
temperature
rises
298
K,
26
22
11
v/v).
Moreover,
activated
exhibited
excellent
catalytic
performance,
stability,
recyclability
cycloaddition
epoxides
under
mild
conditions.
Hence,
this
work
provides
valuable
insight
designing
MOFs
multifunctionality
capture,
separation,
conversion.
Langmuir,
Год журнала:
2024,
Номер
40(43), С. 22773 - 22786
Опубликована: Окт. 18, 2024
In
the
present
work,
a
novel
Cu(II)
complex
containing
10-phenanthroline-5,6-dione
(phen-dione)
and
acetylacetone
(acac)
was
prepared
via
solid-phase
synthesis
on
silica-modified
hercynite
magnetic
nanoparticles
(MNPs).
The
resulting
structure
underwent
thorough
structural
analysis
using
diverse
instrumental
techniques.
catalytic
potential
of
synthesized
successfully
demonstrated
in
2-amino-3-cyano-4
Applied Catalysis O Open,
Год журнала:
2024,
Номер
189, С. 206950 - 206950
Опубликована: Апрель 1, 2024
In
this
work,
a
2-phenyl-2H-1,2,3-triazole-4-yl
structure
was
grafted
onto
SBA-15
silica
utilizing
3-aminopropyltriethoxysilane
(APS)
as
coupling
reagent
to
create
an
silica-supported
Schiff
base.
Fourier
transform
infrared
spectroscopy
(FT-IR),
high
and
low
angle
XRD,
transmission
electron
microscopy
(TEM),
scanning
(SEM)
were
used
examine
the
of
produced
catalysts.
The
characterization
results
showed
that
base
successfully
attached
on
silica's
surface
that,
even
after
chemical
grafting,
hexagonally
organized
mesoporous
preserved.
Knoevenagel
condensation
reaction
isatins
with
malononitrile
or
ethyl
cyanoacetate
in
aqueous
solution
effectively
carried
out
help
catalyst.
Furthermore,
six
runs,
catalyst
can
be
recycled
without
experiencing
noticeable
decrease
activity.
