Dendritic zinc

Fig. 4. Example.s of rough surfaces pretreated for adhesive bonding (a) microtibrous oxide on copper (cf. 29J) (b) a dendritic zinc surface (cf. [30J).

Aida et al. synthesised a dendritic zinc-porphyrin heptamer (7Pz -C60) with a fullerene terminal entity as an electron-transfer system, which harvests visible light for electron transfer to the fullerene group (Section 6.3.3.5). Electron transfer from the porphyrin to the fullerene gives rise to a charge-separated state (Pzn-Qo)> whose lifetime was the subject of investigation. Comparative studies... 

Yamaguchi T, Kimura T, Matsuda H et al (2004) Macroscopic spinning chirality memorized in spin-coated films of spatially designed dendritic zinc porphyrin J-aggregates. Angew Chem Int Ed Engl 43 6350-6355... 

The fines fiction, consisting mainly of zinc and manganese oxides and carbon, are leached in a sodium hydroxide bath. This selectively dissolves the zinc. Any amalgamated mercury present in the zinc precipitates out at this time and settles at the bottom of the reactor. This is periodically tapped off and sent for specialist treatment. After filtration, the zinc rich filtrate is allowed to cool naturally, then dendritic zinc is deposited by electrolysis. This is potentially a high value material used within the paint industry. The sodium hydroxide is recycled back into the alkaline leaching process. 

Lopez CM, Choi K-S (2006) Electrochemical synthesis of dendritic zinc films composed of systematically varying motif crystals. Langmuir ACS J Surf Coll 22 10625-9. doi 10.1021/ la0611864... 

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