Synthesis and Characterization of Simple Self-Assembling, Nanoporous Monolayer Assemblies: A New Strategy for Molecular Recognition.

摘要

Composite monolayer films spontaneously adsorb onto the surface of Au from an ethanolic mixture of two mercaptans to form a nanoporous surface. The monolayers consist of an electron transfer-retarding n-alkanethiol framework, which passivates the Au surface, and a much shorter aromatic mercaptan which induces molecule-sized defects within the passivating framework. Electrochemical experiments indicate that the chemical nature of the template and the template/framework ratio of the deposition solution control the size, number and chemical characteristics of the defects. For example, 4-hydroxythiophenol/1-hexadecanethiol mixed monolayers yield assemblies that admit Ru(NH3)63+ probe molecules but not Fe(CN)6(3-).