Time-Resolved Electron Transfer Between Zn-Porphyrin Chemical Dimers and Covalently Linked Acceptors

E.I. Zenkevich; S.M. Bachilo; A.M. Shulga; A. Willert; U. Rempel; Ch. von Borczyskowski

European Quantum Electronics Conference
Technical Digest Series (Optica Publishing Group, 1998),
paper QTuG67

Time-Resolved Electron Transfer Between Zn-Porphyrin Chemical Dimers and Covalently Linked Acceptors

E.I. Zenkevich, S.M. Bachilo, A.M. Shulga, A. Willert, U. Rempel, and Ch. von Borczyskowski

European Quantum Electronics Conference 1998

Glasgow, Scotland United Kingdom
14–18 September 1998
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E. I. Zenkevich, S. M. Bachilo, A. M. Shulga, A. Willert, U. Rempel, and C. von Borczyskowski, "Time-Resolved Electron Transfer Between Zn-Porphyrin Chemical Dimers and Covalently Linked Acceptors," in European Quantum Electronics Conference, Technical Digest Series (Optica Publishing Group, 1998), paper QTuG67.

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Abstract

Supramolecular donor-acceptor (D-A) arrays on the base of tetrapyrrolic compounds are important as models of the photoinduced electron transfer (ET) that occurs in photosynthesis. In this report we describe cw and femtosecond (δ_1/2 ≈ 280 fs) pump-probe results demonstrating ET phenomena in a series of artificial systems with well-defined structure based on a Zn-octaethylporphyrin chemical, ZnOEP-Ph-ZnOEP (I) and corresponding D-A moieties ZnOEP-Ph-ZnOEP-Sp-A, where an electron acceptor A is covalently linked by a variable spacer (Sp) to the dimer in the opposite meso-position. The following -Sp-A fragments were studied in solvents of various polarity: - Ph-N=CH-AQ (II), -AQ (III), -Ph-SO3-AQ (IV), -Ph-CH₂-Im (V) and -Ph-CH₂-Q (VI).

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