Coordination-Induced Assembly of Coordination Polymer Submicrospheres: Promising Antibacterial and in Vitro Anticancer Activities

Spheres-like coordination polymer architectures in submicro regimes have been synthesized from the hydrothermal reaction of transition metal ions and 3,5-bis­(pyridin-3-ylmethylamino)­benzoic acid (L1). The size of the final coordination polymer was dependent on the concentrations of reactants. Scanning electron microscopy studies monitored at numerous stages of growth reveal that coordination-induced morphology changes from uncoordinated flowerlike ligands to sphere-like coordination polymer particles. Moreover, variations of luminescent and antibacterial profiles are associated with coordination environments or the size of as-obtained coordination polymer samples. In addition, the newly synthesized Cu-based polymer particles may act as novel metal-based anticancer drugs in the future because of their potent in vitro anticancer activities against three chosen cancer lines MCF-7, HeLa, and NCI-H446

Controllable Fabrication of Coordination Polymer Particles (CPPs): A Bridge between Versatile Organic Building Blocks and Porous Copper-Based Inorganic Materials

Hierarchically micro-/nanostructured coordination polymer [Cu­(2,5-PDC)­H₂O]_<i>n</i> architectures with tunable morphologies have been successfully prepared by rationally adjusting the preparation parameters, such as the reactant concentration, solvent, surfactant, and reaction temperature. Using simple calcinations of chosen shaped [Cu­(2,5-PDC)­H₂O]_<i>n</i> architectures, we can obtain several porous copper-based inorganic motifs, which show potential applications for the antibacterial field and lithium ion batteries. Therein, CuO-1 can kill the Gram-positive bacteria <i>Bacillus subtilis and Staphylococcus aureus</i> better than other materials. The value for initial discharge capacity of CuO-3 (1160 mAh g^–1) is higher than the theoretical capacity (674 mAh g^–1) and most copper oxide materials. Besides, Cu/C composites also show intense application in the antibacterial and Li-ions uptake-release field, which will provide a widely used method to prepare the nanosystem of carbon-coating or carbon-compositing materials by simple calcinations of shaped precursor coordination polymer particles used under the proper temperature

Interpenetrated and Polythreaded Co^II-Organic Frameworks as a Supercapacitor Electrode Material with Ultrahigh Capacity and Excellent Energy Delivery Efficiency

Synthesizing kinetically stable coordination polymers (CPs) through ligand functionalization can effectively improve their supercapacitive performances. Herein, we have successfully synthesized three novel and topological Co-CPs by varying the flexible N-donor ligand and inorganic anions, namely, interpenetrated [Co­(HTATB)­(<i>o</i>-bib)]·H₂O, extended two-dimensional (2D) layered Co­(HTATB)­(<i>m</i>-bib)·2H₂O, and three-dimensional (3D) Co­(HTATB)­(<i>m</i>-bib), where bib is the flexible N-donor bis­((1<i>H</i>-imidazol-1-yl)­methyl)­benzene linker (where <i>o</i>- and <i>m</i>- refer to ortho and meta positions, respectively) ligand and HTATB is the partial deprotonation mode from 4,4′,4″-<i>s</i>-triazine-2,4,6-triyl-tribenzoic acid. Various Co-CPs have been directly applied in the field of supercapacitors. All these framework materials exhibit high capacitance, excellent energy delivery efficiency, and good cycling performance. For instance, the maximum specific capacitance for penetrated 3D networks is 2572 F g^–1 at 2.0 A g^–1, and the mean energy delivery efficiency is up to 92.7% based on the tested current densities. Compared with extensional 2D layered and 3D networks, the 3D interpenetrated and polythreaded architectures could provide more active sites and thus promote fast charging and discharging processes. Furthermore, the Li⁺ uptake–release abilities of the Co-based CPs are also investigated, and the initial discharge capacity value for the 3D interpenetrated structures can reach up to 1792 mA h g^–1 at a current density of 50 mA g^–1

Double-Carbon Matrix-Supported MnO₂ for High-Voltage Supercapacitors in a Neutral Aqueous System

The low conductivity and poor structural stability of MnO2 nanoparticles have impeded further enhancement in specific energy density for aqueous asymmetric supercapacitors. To address this issue, in this article, carbon nanotubes (CNTs) and mesoporous carbon (meso-C) are merged together, ultrasonically treated with poly(sodium 4-styrenesulfonate) surfactant and then immersed in a KMnO4 solution at room temperature to generate a composite, namely, double-carbon matrix (CNTs and meso-C)-supported K–MnO2 (K+ incorporated state). When this composite was employed as an electrode in the neutral aqueous electrolyte, this material behaved as a redox pseudocapacitor and delivered a maximum specific capacity of 292.5 C g–1 (∼585 F g–1). When the composite was used as one electrode and the negative-activated carbon was employed as the other electrode, the as-assembled hybrid asymmetric device in the neutral aqueous system could achieve a specific capacitance of 86.0 F g–1 within an ultrahigh potential range of 0–2.1 V, breaking through a bondage of 2.0 V. This energy-storage device could deliver 52.7 W h kg–1, correlating to a power density of 525 W kg–1. Moreover, the effects of various ratios between CNTs and meso-C on the resulting performance were also investigated and compared