TY - JOUR
T1 - Highly Photostable Sensitizers for Artificial Photosynthesis. Ru(II)-3, 3′-Bis(diazine)-6, 6′-oligo(ethylene glycol) Complexes and a New Class of Podates
AU - Dürr, Heinz
AU - Schwarz, Ralph
AU - Andreis, Christine
AU - Willner, Itamar
PY - 1993/12/1
Y1 - 1993/12/1
N2 - 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+ (ɸp = 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.
AB - 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+ (ɸp = 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.
UR - http://www.scopus.com/inward/record.url?scp=0027818724&partnerID=8YFLogxK
U2 - 10.1021/ja00079a017
DO - 10.1021/ja00079a017
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AN - SCOPUS:0027818724
SN - 0002-7863
VL - 115
SP - 12362
EP - 12365
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 26
ER -