Self-assembly of a functional cryptand core（1） having six dithiocarbamate groups and \{（dppm）Au2Cl\}2 in methanol followed by the addition of excess NH4PF6 affords a novel metallodendritic supramolecule（2）. This...Self-assembly of a functional cryptand core（1） having six dithiocarbamate groups and \{（dppm）Au2Cl\}2 in methanol followed by the addition of excess NH4PF6 affords a novel metallodendritic supramolecule（2）. This dendritic supramolecule was characterized by NMR, MS, XPS, IR, UV-Vis, luminescence spectra and elemental analyses. The results show the concentration-dependent absorption and luminescent properties in acetonitrile solution for the title compound, which may be closely related to the intramolecular and intermolecular aggregation of digold（Ⅰ） branches through Au（Ⅰ）…Au（Ⅰ） interactions.展开更多
The correlation of plating structure with the antioxygenation of micro Cu-Ag bimetallic powder was studied by SEM、XRD、TG and other means.It was found that copper powder plated with silver having an interspersion str...The correlation of plating structure with the antioxygenation of micro Cu-Ag bimetallic powder was studied by SEM、XRD、TG and other means.It was found that copper powder plated with silver having an interspersion structure posesses antioxygenation at normal atmospheric temperature as surface Ag content reaches above 15.22%,the temperature of oxidation resistance varies with the surface Ag content.The greater the surface Ag content is,the higher the temperature of antioxygenation for bimetalic powder with the plating interspersion structure.The copper powder plated by silver with full packaging structure can not be oxidized even at展开更多
文摘Self-assembly of a functional cryptand core（1） having six dithiocarbamate groups and \{（dppm）Au2Cl\}2 in methanol followed by the addition of excess NH4PF6 affords a novel metallodendritic supramolecule（2）. This dendritic supramolecule was characterized by NMR, MS, XPS, IR, UV-Vis, luminescence spectra and elemental analyses. The results show the concentration-dependent absorption and luminescent properties in acetonitrile solution for the title compound, which may be closely related to the intramolecular and intermolecular aggregation of digold（Ⅰ） branches through Au（Ⅰ）…Au（Ⅰ） interactions.
文摘The correlation of plating structure with the antioxygenation of micro Cu-Ag bimetallic powder was studied by SEM、XRD、TG and other means.It was found that copper powder plated with silver having an interspersion structure posesses antioxygenation at normal atmospheric temperature as surface Ag content reaches above 15.22%,the temperature of oxidation resistance varies with the surface Ag content.The greater the surface Ag content is,the higher the temperature of antioxygenation for bimetalic powder with the plating interspersion structure.The copper powder plated by silver with full packaging structure can not be oxidized even at
