National Student Team Contest

The white powder A containing 9,66 wt.% of nitrogen can be prepared with high yield by Skraup reaction from 2-aminophenol. The reaction of A with lead acetate and sodium perchlorate in methanol gave the single crystals of B. The compound B has a molecular structure...

Proteins in living cells perform their functions in pairs and groups. One of the methods which allows investigation of molecular interaction is surface plasmon resonance (SPR). SPR occurs when polarized light strikes an electrically conducting surface, often gold films, at the interface between two media...

Unusual bacteria X excrete molecules B which bind selectively gold ions and turn them into gold nanoparticles (Fig. (a), I, for comparison are shown bacteria not producing B: cells II and III). B production increases with the iron concentration decrease in the medium...

The scheme above describes the synthesis of some kind of homologous nanoobjects Z, starting from simple compounds. Schematically draw the structures of nanoobjects Z1, Z2, Z3. What are the stoichiometries for their formation reactions and what are their charges?..

Metal clusters are the smallest nano-scale compounds which could be applied as precursors for mesoporous materials and metal nanoparticles. Substance A is an ionic compound with a metal cluster-anion of the general formula [(C₂H₅)₄N]⁺₃[X]^3– which demonstrates catalytic activity in hydration reactions...