A porous
two-dimensional (2D) metal–organic framework (MOF), namely,
[Cd(PBA)(DMF)]·DMF (Cd-PBA), has been solvothermally synthesized
by the reaction of 5-(4-pyridin-3-yl-benzoylamino)-isophthalic acid
ligand (H2PBA) and Cd(II) ions. Structural analysis shows
that Cd-PBA possesses 2D (3,6)-connected kgd net topology
with the Schläfli symbol of (43)2(46.66.83) and exhibits two distinct types
of one-dimensional opening channels along a- and c-axes. The incorporation of Cd metal centers and −NH
groups of amides endows Cd-PBA rich open metal sites and Lewis basic
sites, which are applied as an efficient catalyst for the important
Knoevenagel condensation and cyanosilylation of aldehyde reactions.
This Cd-PBA presents highly efficient catalytic activity and recyclability
for both Knoevenagel condensation reaction and cyanosilylation of
various aldehydes with trimethylsilyl cyanide (TMSCN). The excellent
catalytic activity can be maintained at least four cycles without
loss of obvious catalytic activity. These results indicate Cd-PBA
can serve as a promising heterogeneous catalyst toward C–C
bond formation due to the stability and high catalytic activity.
By application of newly designed ligand 5-(3-(pyridin-3-yl)benzamido)isophthalic acid (HPBI) to react with Mn(NO) under solvothermal conditions, a 2-fold interpenetrated Mn-based metal-organic framework (Mn-PBI) with rutile-type topology has been obtained. When treated as a precursor by pyrolysis of Mn-PBI at 500 °C, mesoporous MnO/C-N nanostructures were prepared and treated as an lithium-ion battery anode. The MnO/C-N manifests good capacity of approximately 1085 mAh g after 100 cycles together with superior cyclic stability and remarkable rate capacity, which is supposed to benefit from a large accessible specific area and unique nanostructures. The remarkable performances suggest promising application as an advanced anode material.
A three-dimensional
(3D) metal–organic framework (MOF),
namely, {[Mn4(PBA)4(H2O)6·5H2O]}
n
(Mn-PBA), has
been successfully constructed from 5-(4-pyridin-3-yl-benzoylamino)-isophthalic
acid ligand (H2PBA) and Mn(II) ions under solvothermal
condition. Structural analysis reveals that there exist 1D hexagonal
channels in the 3D structure along the b-axis. Mesoporous
Mn3O4/C composites were fabricated by the direct
thermolysis of Mn-PBA at 500 °C under an air atmosphere. When
tested as a lithium-ion battery anode material, the Mn3O4/C electrode delivers an excellent capacity of 1032
mAh g–1 at 200 mA g–1 after 500
cycles along with remarkable rate capacity, which is supposed to benefit
from the unique microspheres characteristic and large accessible specific
area. Owing to the good cycling stability and high capacity, the Mn3O4/C electrode can be regarded as a promising anode
material for LIBs.
Porous carbon material was synthesized by calcination of a Cd-MOF template. When evaluated as an anode material for lithium-ion batteries, the carbon electrode shows a high reversible discharge capacity.
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