Conditions of gallium plating of metal electrodes were studied in the paper. It was found that stability of gallium cover depends on the material and is increasing in the raw: stainless steel 08Х18Н12Т < Steel 1...Conditions of gallium plating of metal electrodes were studied in the paper. It was found that stability of gallium cover depends on the material and is increasing in the raw: stainless steel 08Х18Н12Т < Steel 1, Steel 2, Steel 3, Steel 45 < Ni < Cd < Cu. Phase composition of the electrode surface layer obtained after gallium plating was studied. It was found that gallium with nickel form Ga36Ni64(Ga Ni2) compound and gallium with copper form CuGa2compound. Different acids were used for electrode leaching: H2SO4;HNO3;H3PO4;HCI. It was shown that only hydrochloric acid is suit-able for gallium plating of the electrodes.展开更多
One-pot synthesis of substituted pyrano- and furano[3,2-c]quinoline derivatives from appropriately substituted anilines, substituted benzaldehydes and dienophiles via Povarov reaction catalyzed by HCl-ethanol were rep...One-pot synthesis of substituted pyrano- and furano[3,2-c]quinoline derivatives from appropriately substituted anilines, substituted benzaldehydes and dienophiles via Povarov reaction catalyzed by HCl-ethanol were reported. Good to excellent yields with high diastereoselectivity were obtained in all entries tested.展开更多
文摘Conditions of gallium plating of metal electrodes were studied in the paper. It was found that stability of gallium cover depends on the material and is increasing in the raw: stainless steel 08Х18Н12Т < Steel 1, Steel 2, Steel 3, Steel 45 < Ni < Cd < Cu. Phase composition of the electrode surface layer obtained after gallium plating was studied. It was found that gallium with nickel form Ga36Ni64(Ga Ni2) compound and gallium with copper form CuGa2compound. Different acids were used for electrode leaching: H2SO4;HNO3;H3PO4;HCI. It was shown that only hydrochloric acid is suit-able for gallium plating of the electrodes.
基金the National Natural Science Foundation of China for financial support(Nos.30873137, 30772645 and 81172927)
文摘One-pot synthesis of substituted pyrano- and furano[3,2-c]quinoline derivatives from appropriately substituted anilines, substituted benzaldehydes and dienophiles via Povarov reaction catalyzed by HCl-ethanol were reported. Good to excellent yields with high diastereoselectivity were obtained in all entries tested.