F. Uckert, S. Setayesh, K. Müllen
Jun 18, 1999
Citations
0
Influential Citations
51
Citations
Journal
Macromolecules
Abstract
2,7-Poly(9-fluorenone) (PF) (1), a unique electron-deficient conjugated polymer, was prepared via a precursor route, using 2,7-poly(spiro[4‘,4‘-dioctyl-2‘,6‘-dioxocyclohexane-1‘,9-fluorene]) (10b) (POFK) as precursor polymer. Ketalization of 2,7-dibromo-9-fluorenone (6) with the diol 2,2-dioctyl-1,3-propanediol (8b) afforded a dibrominated ketal derivative of fluorenone (9b) which after Ni(0)-induced coupling provided the well-processable, structurally defined precursor polymer 10b with a polyphenylene backbone. Conversion to PF (1) proceeded smoothly by treating a POFK (10b) film with dichloroacetic acid. The cyclic voltammogram of PF (1) exhibits a reversible reduction with a E1/20 of −1.48 V vs Fc/Fc+ which qualifies 1, together with its facile accessibility, e.g., as electron transport material in multilayer LED.