In this paper, one imidazole macrocyclic divalent cation with a flexible configuration was chosen with the aim of the immobilization of its conformation. Six novel organic-inorganic hybrid supramolecules {([syn/anti-did](CdI4)(C2H3N)} (1), {([syn/anti-did](HgI4)(C2H3N)} (2), {([syn/syn-did](Pb2I8)(PbI5)} (3), {([syn/syn-did](Bi2I8)(BiI5)} (4), {([syn/syn-did](Ag4Br6)} n (5), and {([syn/anti-did](Ag2I4)} (6) [did2+ = (12z, 52z)-11H, 51H-1, 5(1, 3)-diimidazol-3-iuma-3, 7(1, 2)-dibenzenacyclooctaphane-13, 53-diium] have been synthesized through the self-assembly reaction of did2+ with different metals under solvothermal reaction. These compounds have been unambiguously confirmed by powder X-ray diffraction, IR, thermogravimetric and X-ray single-crystal diffraction. Crystallographic analysis shows that the anions of compounds 1 and 2 are isostructural with mononuclear anion structure, the anions of compounds 3, 4, and 6 are of binuclear structure, and compound 5 anion is a one-dimensional anionic chain structure. Imidazole cyclophanes of organic cations may exist in a syn/syn-conformation in 3-5 or syn/anti conformation in 1, 2, 6, but tilting angles in compounds 1-6 were different. This article described the photocatalytic degradation of organic dye in waste water and the optical band gap of compounds 1-6. The calculated semiconductor band gap of compounds 1-6 is smaller than that of TiO2, so compounds 1-6 have semiconductor properties. Compound 1 has the smallest band gap value, and the photocatalytic performance is the best.

Hybrid Supramolecules for Azolium-Linked Cyclophane Immobilization and Conformation Study: Synthesis, Characterization, and Photocatalytic Degradation.

FCC (Fluid Catalytic Cracking) gasoline oxidation desulphurization method based on molybdenum polyoxometallate

The invention relates to the field of wastewater treatment, and specifically relates to a polymolybdic acid hybrid compound with high-selectivity adsorption property, and a preparation method and an application thereof. The asymmetric unit of the cell of the polymolybdic acid hybrid compound has a chemical general formula of (C5H7N2)4[Mo8O26]. The unit comprises a discrete (Mo8O26) anion and 4 protonated 4-aminopyridine. According to the invention, ammonium molybdate tetrahydrate and 4-aminopyridine are adopted as raw materials; cadmium chloride is adopted as a catalyst; the materials are mixed, and a hydrothermal reaction is carried out, such that the polymolybdic acid hybrid compound is obtained. The polymolybdic acid hybrid compound provided by the invention has a high adsorption property upon dyes, and has a methylene blue maximum adsorption capacity reaching 680.3mg/g, which is greatly higher than adsorbent maximum adsorption capacities reported by other literatures. The polymolybdic acid compound provided by the invention has an adsorption priority upon positively charged dyes, such that mixed dye adsorption separation can be realized. The compound has high stability and excellent renewability, and can be recycled repeatedly.

Polymolybdic acid hybrid compound with high-selectivity adsorption property, and preparation method and application thereof

Influence of 4-cyanopyridinium multicationic isomers on the structure–property relationships of two-dimensional hybrid as photocatalyst for the degradation of organic dyes

The invention discloses a preparation method of an organic-inorganic hybridization material of silver bromide. The preparation method comprises the following synthetic steps: (1) adding silver bromide and potassium bromide into a dimethyl formamide solution, completely dissolving the silver bromide and potassium bromide to obtain a solution A; (2) adding 1,3-bis(4-methylpyridine) propane di-bromide into a methanol solution, and completely dissolving the 1,3-bis(4-methylpyridine) propane di-bromide to obtain a solution B; and (3) dropwise adding the solution B into the solution A, generating white precipitates, after the dropwise addition is completed, filtering a filter solution, standing the filter solution, volatilizing a solvent under the room temperature, precipitating colorless blocked crystals, washing the blocked crystals sequentially by utilizing distilled water and anhydrous ethanol, drying to obtain the target product organic-inorganic hybridization material of the silver bromide. The preparation method is simple and feasible, the prepared silver bromide organic-inorganic hybridization material is basically not decomposed at the temperature of 280 DEG C or less and is maintained stable; and when the organic-inorganic hybridization material is used for the photocatalytic degradation of organic waste water containing methylene blue, the activity is good, and the photocatalytic activity and environmental protection property are very high.

Preparation method of organic-inorganic hybridization material of silver bromide

The solution-phase reaction of HgCl2 with benzyldiphenylphosphine (PPh2Bz) yields a new triaryl phosphine complex [HgCl2(PPh2Bz)2] (1) with the bigger P–Hg–P angle, the longer Hg–Cl bond, and the shorter Hg–P bond. Comparison of the sensitive bond parameters with similar compounds and the theoretical calculation show that the σ-donating abilities of tertiaryl phosphine ligands toward HgCl2 conforms to the following order: PEt3 > PPh2Bz > P(2-thienyl)3 > dppf > PPh3. The solution-phase reaction of HgCl2 with benzyldiphenylphosphine (PPh2Bz) yields a new triaryl phosphine complex [HgCl2(PPh2Bz)2] (1) with the bigger P–Hg–P angle. Comparison of the sensitive bond parameters with similar compounds shows that the σ-donating abilities of tertiaryl phosphine ligands toward HgCl2 conforms to the following order: PEt3 > PPh2Bz > P(2-thienyl)3 > dppf > PPh3.

Synthesis, Structure and Theoretical Research of a New Triaryl Phosphine Complex [HgCl2(PPh2Bz)2] (PPh2Bz = Benzyldiphenylphosphine)

The invention discloses polymolybdate compounds which have the general formula as follow, wherein R1 represents C4-C5 alkylidene, and the polymolybdate compounds are prepared through the reaction of the aqueous solution of [C14H18N2]2Br2 and [C15H20N2]2Br2 and the aqueous solution of (NH4)6Mo7O24.4H2O. The invention provides the polymolybdate compounds of [C14H18N2]2[Mo8O26] and [C15H2ON2]2[Mo8O26], and the two polymolybdate compounds can be used as catalysts, have advantages of high stability, insoluble in water, easy separation and strong repeatability and better catalytic performance on organic oxidation reaction. The invention prepares the two polymolybdate compounds by using the hydrothermal method and has simple preparation method, easily controllable process and low preparation cost.

Polymolybdate compounds and method of preparing same

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Synthesis, Structure and Theoretical Research of a New Triaryl Phosphine Complex [HgCl2(PPh2Bz)2] (PPh2Bz = Benzyldiphenylphosphine)

Polymolybdate compounds and method of preparing same