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SINGLE MOLECULE IMMOBILIZATION OF π-CONJUGATED MOLECULES ON Au USING DENDRIMER-BASED TEMPLATES

ABDELHAK BELAISSAOUI, HIDEO TOKUHISA, EMIKO KOYAMA, MASATOSHI KANESATO

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We demonstrate that immobilization of a π-conjugated molecule containing a bipyridine moiety as a hydrogen bond acceptor on Au using a dendrimer-based template with 3,4-dihydroxybenzene moiety at the core as a hydrogen bond donor. The hydrogen bond interaction was used for the linkage between the conjugated molecule and the template to improve the method to fabricate single-molecule arrays we reported before.1 Although the binding constant is small ( K = 120 ± 20 M -1) in CDCl 3, it was demonstrated that the dendrimer spacer serves as a template to isolate the π-conjugated molecule, and is removable simply with a CH 2 Cl 2 rinsing by surface FTIR spectroscopy.