Supramolecular nanowires formed by amphiphilic self-assembly of NAD with cyanine dyes and their redox properties

Research output: Contribution to conferencePaper


We have searched for cationic chromophores that form aggregates in the presence of nicotinamide adenine dinucleotide (NAD), and came across a cyanine dye 1. It gives a monomeric absorption peak in methanol at 577 nm. On the other hand, a blue shifted peak is appeared at 520 nm in water, indicating the formation of H-aggregates of the dyes. Addition of NAD+ caused decrease in absorption intensity at 520 nm, and a new absorption peak is appeared at 647 nm (J-band) with a strong fluorescence. Transmission electron microscopy (TEM) reveals the formation of developed nanowires with bundled 1/NAD+ complexes (width; ca. 6-8 nm, length; several microns). On the other hand, such assemblies are not formed from the pair of 1/NADH. The present supramolecular systems would be applicable to the redox-switched formation of fluorescent nanowires.

Original languageEnglish
Number of pages1
Publication statusPublished - Dec 1 2005
Event54th SPSJ Annual Meeting 2005 - Yokohama, Japan
Duration: May 25 2005May 27 2005


Other54th SPSJ Annual Meeting 2005


All Science Journal Classification (ASJC) codes

  • Engineering(all)

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