The ligand effect of atomically precise gold nanoclusters in tailoring catalytic properties.

It is well known that surface ligands are vital layers for ligand-protected Au nanoclusters. Improving the knowledge of the relationship between ligands and catalytic properties is a forefront research topic for Au nanoclusters. Enormous effort has been devoted to realizing the ligand effect in synthesis, including well-controlled sizes and shapes as well as structural transformation.

Pyrolysis Characteristics of Jet Coal and Oxidation of Residues in Zhundong Coalfield Fires.

Coalfield fire area reburning is one of the serious disasters in fire prevention and safety production. In this study, a synchronous thermal analyzer was used to conduct isothermal pyrolysis of jet coal at different temperatures, and the reaction characteristic parameters of different pyrolysis residual structures were analyzed. FTIR was used to measure group contents in raw coal and different pyrolysis residues.

Auxiliary Ligand-Dependent Adaptive Regulation of Uranyl Coordination in Mixed-Ligand Uranyl Compounds of Flexible Biphenyltetracarboxylic Acid.

The mixed-ligand strategy is one of the important methods for preparing new materials and regulating the properties of materials. In this work, by introducing different auxiliary ligands (ALs), we have obtained a series of mixed-ligand uranyl complexes (-) from a flexible biphenyltetracarboxylic acid (Hbptc) with an adjustable orthogonal conformation and studied the influence of different organic base molecules on the coordination and assembly of Hbptc with a uranyl cation. It is found that the coordinated ALs, including 4,4'-bipyridine-1,1'-dioxide and 1,10-phenanthroline, partially occupy the coordination sites of the uranyl center and directly affect the molecular conformations and uranyl coordination of flexible bptc linkers.