Abstract
The formation processes of and molecular ordering in self-assembled monolayers were investigated by fluorescence probing with p-terphenyl chromophores binding to disulfides at the o- or p-positions. In mixtures with dodecanethiol, the derivatized disulfides formed ordered monolayers. As compared with the broad monotonic fluorescence spectra in solutions, their emission bands were split into distinct peaks upon chemisorption on gold substrates due to intermolecular interactions between adjacent terphenyl groups. Their emission peak positions were interpreted in terms of the exciton coupling of various dimeric terphenyl configurations in the monolayers depending on the o- and p-isomeric structures.
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