A Unidirectional Energy transfer cascade process in a Ruthenium junction self assembled by α- and β- Cyclodextrins

Jonathan Faiz, RM Williams, Maria Pereira Silva, L De Cola, Zoe Pikramenou

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

A Ru(II) complex, Ru(alpha2beta), with a trisbipyridyl core and two different receptor sites, alpha- and beta-cyclodextrins, acts as a junction to recognize photoactive guests based on anthracene, Anth, and Os(II), Os-ada, in aqueous solution. Upon light excitation of the self-assembled system Anth.Ru(alpha2beta).Os-ada, an energy cascade process takes place from the Anth guest to the Ru(alpha2beta) core, and subsequently, the energy is funneled to the Os-ada guest. The rates of the two photoinduced processes are determined by time-resolved emission and transient absorption spectroscopic techniques. The system introduces a directed self-assembly approach to unidirectional wires that can lead to nanosized arrays by judicious selection of the individual components.
Original languageEnglish
Pages (from-to)4520-4521
Number of pages2
JournalJournal of the American Chemical Society
Volume128
Issue number14
DOIs
Publication statusPublished - 22 Mar 2006

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