Synthesis And Properties Of Metal Organic Skeleton Based On Imidazo Porphyrin

We described two metal-organic frameworks (MOFs) which were constructed from meso-tetra(4-imidazoyl)porphyrin (hereafter, TImP) and reported their revellent properties in chapter two of this thesis. Notably, these two structures were the first example of MOFs that assembled by TImP and show some interesting properties. Compound 1 exhibited ultrahigh chemical stability, which believed origins from the high pKa value of TImP, compound 2 exhibited a unique coordination model that had not been found before in porphyrinic MOFs, and also exhibited a catalytic property that can catalyze the oxidation of styrene. These foundings will facilitate further study of TImP and porphyrinic MOFs.In chapter three, we described three simple coordination compounds and calculated their semiconductor bandgaps via Kubelka-Munk method. We found that the bandgap of these compounds was greatly influenced by their central atoms, the smaller the atom, the larger the bandgap. This finding was very different from experimental and computational results based on IsoReticular MOFs and may be helpful for synthesis other novel compounds or MOFs with semiconductor properties.A facile solvothermal method for synthesis multimorphology nanosized hematite was described in chapter four. Unlike traditional methods, the morphology of hematite can be easily controlled just by changing the ratio of solvents and the concentration of surfactant (TPTz). It is believed that this method will be useful for synthesis other nano metallic oxide.In chapter five, we summarized recent progress in hydrogen storage in MOFs assisted by hydrogen spillover phenomenon. Though much hydrogen can be absorbed in MOFs at 77 K, MOFs will not have a high storage capacity at ambient temperatures. Hydrogen spillover is a novel method that can greatly enhance room-temperature hydrogen storage in MOFs. Firstly, we provided a short history of hydrogen spillover and its application in MOFs, and then discussed some influence factors that influence the storage capacity; we also summarized a simple mechanism of this method, at last some open issues were discussed. We hope this chapter can facilitate further study of this method.