Heterometallic trinuclear cluster-based microporous metal-organic framework with high adsorption selectivity of CO2 over N2

Synthesis of a Heterometallic [Zn2Ca] Pinwheel Array Stabilized by Amide-Amide Synthons

The rational design of heterometallic compounds bearing s-block metal ions have been a difficult task for chemists owing to their lack of preferential geometries. However, some strategies, such as the design of coordinating pockets with different sizes and/or donor atoms, have offered great results. In this work, this strategy has been tested using Ca(II) as an s-block metal ion and a compound previously obtained by our group with the formula [Zn3(μ-ACA)6(4-phpy)2], which contains tetrahedral N,O- and octahedral O-coordinating pockets as a model structure. From this work, the corresponding heterometallic compound with the formula [Zn2Ca(μ-ACA)6(4-phpy)2]·EtOH (1) has been successfully synthesized, and fully characterized, and its crystal structure has been elucidated. Furthermore, we have compiled all the crystal structures containing [Zn2M] pinwheel secondary building units (SBUs), where M stands for an s-block metal ion, and the observed tendencies, as well as the promising applications as template SBUs for the preparation of 1D–3D coordination polymers, have been discussed. Finally, solid-state UV-Vis and photoluminescence have been recorded and compared with the homometallic [Zn3(μ-ACA)6(4-phpy)2] compound.

Two New Zn(II)/Cu(II) Compounds: Photoluminescent and Photocatalytic Properties, and Protective Activity on Parkinson Disease

Two coordination polymers, that is [Zn(pdc)(im)(H₂O)]_n (1) and [Cu(pdc)(im)₂]_n·n(H₂pdc) (2) (H₂pdc = terephthalic acid, im = imidazole), were hydrothermally synthesized via the reactions of H₂pdc and im in combination with Zn(II) or Cu(II) ions. Compound 1 shows intense blue luminescence and compound 2 shows good photocatalytic activity for the methyl violet degradation under the irradiation of ultraviolet light. In addition, the assessment of the two compounds' application values against Parkinson's disease were carried out and their specific mechanism was tested simultaneously. First of all, the real time RT-PCR was implemented and the relative expression levels of N-methyl-D-aspartic acid receptor receptor on neurons were measured. Besides, the Annexin V-FITC/PI apoptosis assay was utilized for the assessment of the influence of the compounds on the dopaminergic neuron death rate. The hemolysis toxicity detection was conducted to detect the biocompatible of the compounds.