Highly Photostable Sensitizers for Artificial Photosynthesis. Ru(II)-3, 3′-Bis(diazine)-6, 6′-oligo(ethylene glycol) Complexes and a New Class of Podates

Heinz Dürr*, Ralph Schwarz, Christine Andreis, Itamar Willner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Absorption spectra, emission spectra (90 and 298 K), luminescence lifetimes, luminescence quantum yields, and photochemical behavior of a semicage bipyridazine (bpdz) Ru(II) complex K6 and related open-chain bpdz model complexes K1–4 have been studied and compared with those of Ru(bpy)32+ K5. The absorption bands in the visible spectra of K1–4 and Ru-podate K6 are close in energy to the corresponding bands of Ru(bpy)32+, whereas the emission bands are slightly red shifted. The luminescence lifetimes of K1–4/K6 (1500–3400 ns) are longer than that of K5 (600 ns). The open-chain bpdz model complexes K1–4 and especially K6 are highly photoinert (ɸp ≤ 10−5) relative to the photodissociation of Ru(bpy)32+p = 0.068). These excellent photophysical properties and stabilities of the complexes K1–4 and the Ru-podate K6 allow their effective use as photosensitizers in electron-transfer processes.

Original languageEnglish
Pages (from-to)12362-12365
Number of pages4
JournalJournal of the American Chemical Society
Volume115
Issue number26
DOIs
StatePublished - 1 Dec 1993

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