Two cobalt(II) coordination polymers constructed from tetrafluoroterephthalate and hexamethylenetetramine ligands

Cobalt-Based Layered Metal–Organic Framework as an Ultrahigh Capacity Supercapacitor Electrode Material

“…Figure a is the powder X-ray diffraction (XRD) pattern of as-synthesized Co–LMOF. From it, we can observe that the diffraction peak positions for as-synthesized Co–LMOF are the same as those of the simulation based on Co–LMOF single-crystal data (CCDC 905134), indicating that as-synthesized Co–LMOF has high purity. The contents of C, H, N, and Co in the Co–LMOF sample were determined by using elemental analysis and the ICP spectrum, respectively.…”

Syntheses, Crystal Structures, Luminescence, and Magnetic Properties of Two Coordination Polymers Derived From Semirigid 1‐Carboxymethyl‐3, 5‐Dimethyl‐1H‐Pyrazole‐4‐Carboxylic Acid

“…Shared with the central Cd II atoms, a 2D rhombic [Cd(cdpc)(hmt)] n layer was constructed, which can be viewed as a 4‐connected (4 4 .6 2 )‐sql sheet from the viewpoint of topology (Figure 2). μ 2 bridging mode of hmt in 1 is comparable with that in previously reported compounds {[Co(hmt)(tfbdc)(H 2 O) 2 ] · (H 2 O) 2 } n (H 2 tfbdc = 2, 3,5, 6‐tetrafluoroterephthalic acid) and [ M 2 (C 3 H 2 O 4 ) 2 (H 2 O) 2 ( μ 2 ‐hmt)] n ( M = Zn, Cu) 22,23. On the other hand, the lattice water molecules accommodate inside these square nets and interact with the host frameworks through O–H ··· O, O–H ··· N, and C–H ··· O hydrogen bonds (Table 2), resulting in the formation of a 3D supramolecular packing network along the crystallographic a axis in an …ABAB… stacking fashion (Figure 3).…”

Recent advances in pillar‐layered metal‐organic frameworks with interpenetrated and non‐interpenetrated topologies as supercapacitor electrodes

“…In 2016, the same research group [46] employed similar layer and pillar ligands to construct a 3D Co-based supramolecular framework with lattice H 2 O molecules in the interlayer (Figure 3a and 3b). [47] When employed as an SC electrode in a three-electrode system, this material exhibited the maximum specific capacitance of 2474 F g À 1 under 1 M KOH electrolyte (Figure 3c) and the specific capacitance retention rate after 2000 cycles was close to 94.3 %, higher than that in 1 M LiOH environment (Figure 3d). These results suggest that the strategy to modify ligands with functional groups can alter the frame structures and consequently adjust the transport modes of ions and electron mobility.…”

“…As a SC electrode material, it displayed superior electrochemical performance with the highest specific capacitance of 1274 F g −1 and the capacitance loss of 12 % after 2000 cycles. In 2016, the same research group [46] employed similar layer and pillar ligands to construct a 3D Co‐based supramolecular framework with lattice H 2 O molecules in the interlayer (Figure 3a and 3b) [47] …”