page_title: Schiff base
section_title: Nanotechnology
hierarchical_section_title: Schiff base / Nanotechnology
caption_attribution_description: Formation of Schiff base from furfuraldehyde and hydrazine hydrate inside a rolled halloysite nanotube, and the proposed structure of the ruthenium complex.
context_page_description: A Schiff base is a compound with the general structure R₁R₂C=NR'. They can be considered a sub-class of imines, being either secondary ketimines or secondary aldimines depending on their structure. The term is often synonymous with azomethine which refers specifically to secondary aldimines.
  A number of special naming systems exist for these compounds. For instance a Schiff base derived from an aniline, where R³ is a phenyl or a substituted phenyl, can be called an anil, while bis-compounds are often referred to as salen-type compounds.
  The term Schiff base is normally applied to these compounds when they are being used as ligands to form coordination complexes with metal ions. Such complexes occur naturally, for instance in corrin, but the majority of Schiff bases are artificial and are used to form many important catalysts, such as Jacobsen's catalyst.
context_section_description: Schiff bases can be used to mass-produce nanoclusters of transition metals inside halloysite. This abundant mineral naturally has a structure of rolled nanosheets (nanotubes), which can support both the synthesis and the metal nanocluster products. These nanoclusters can be made of Ag, Ru, Rh, Pt or Co metals and can catalyze various chemical reactions.
caption: Formation of metal clusters in halloysite nanotubes via a Schiff base reaction on example of ruthenium.[14]
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