In order to extract copper metal from the waste dump of Dexing copper mine and resolve the environmental problems caused by acidic water and heavy metals, a dump bioleaching plant was designed based on a series of experimental investigations. The investigation shown that the low-grade of the dump, refractoriness of chalcopyrite, leakage of pad, small Acidithiobacillus population and low dump pe...

A novel organic-inorganic hybrid of triethanolamine linked covalently with a new building block of {VMo6O25} was synthesized in aqueous solution, and the hybrid was further assembled with copper-triethanolamine complexes to form a ring-like structure. This work represents an advance in the organic functionalization of polyoxometalate performed in aqueous solution instead of an organic solvent.

A key question in the biological activation of oxygen is how the protein matrix regulates the delivery of oxygen to its site of activation. We are using Escherichia coli copper amine oxidase as a model system to investigate the roles played by both local active site residues as well as long range interactions in this process. We have generated active site mutants, as well as mutants in the puta...

In the title compound, {(C(8)H(20)N(2))[Al(HPO(4))(PO(4))]}(n), the Al(III) atom is coordinated by four O atoms from two HPO(4) (2-) and two PO(4) (3-) groups in a distorted tetra-hedral geometry. Each AlO(4) unit shares four O atoms with four adjacent PO(4) units, leading to an anionic chain along [100]. The negative charge of the chain is compensated by doubly protonated camphoric amine catio...

The asymmetric unit of the title compound, C(16)H(24)Br(2)N(2)O(2), contains two independent mol-ecules, each which has two intra-molecular N-H⋯O hydrogen bonds linking the amine N atoms to the enolic O atoms of the same acacH-imine unit. In the crystal, the mol-ecules are lined up by inter-molecular weak C-H⋯O hydrogen bonds, forming two vertical each other two-dimensional chains along the a a...

A DABCO-catalyzed domino reaction between methyleneoxindoles and allenoates which enables the direct synthesis of spirooxindoles is reported. This is the first example of a non-substituted allenoate to act as a four-carbon synthon in a tertiary amine-catalyzed reaction.

Hybrid nanosheets of hyperbranched poly(ether amine) are demonstrated as a novel 2D-platform for metal nanoparticles, which makes metal nanoparticles transfer reversibly between oil and water phases.

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