Donor–Acceptor??Substituted Oligo (1, 4??phenylene) s

S Kim, A Oehlhof, B Beile, H Meier

Index: Kim, Soungkyoo; Oehlhof, Annette; Beile, Bernhard; Meier, Herbert Helvetica Chimica Acta, 2009 , vol. 92, # 6 p. 1023 - 1033

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Citation Number: 9

Abstract

Oligo (para-phenylene) s (DAOPPs) 2a–2d (n ¼ 1–4) with terminal donor–acceptor substitution (D ¼ C6H13O, A ¼ NO2) were prepared by applying Suzuki cross-couplings for chain extension and end capping. The push–pull effect induces short-reaching polarizations of the chain consisting of conjugated but twisted benzene rings, which was studied by NMR measurements. Electron excitation from the ground-state S0 to the more planar first- ...