Abstract
This paper presents a study of excitation dynamics and two-photon properties in new branched poly(p-phenylenevinylene) structures which can be viewed as composed of interlinked structural units producing localized but interacting electronic excitations. Poly(p-phenylenevinylene) (PPV) derivatives, specifically poly[2-(9-phenylanthracen-10-yl)-1,4-phenylenevinylene] (P-1) and poly[2-(2-ethylhexyloxy)-5-(9-phenylanthracen-10-yl)-1,4-phenylenevinylene] (P-2), carrying 9-phenylanthracene pendent were prepared, and their one- and two-photon absorption and emission properties were studied in solution. P-1 and P-2 differ in structure by the presence of additional 2-ethylhexyloxy pendent groups in P-2. Both polymers were prepared by direct polymerization of the α,α‘-dibromo-p-xylene monomers having the pendent group(s) in the present of excess potassium tert-butoxide. For the sake of comparison, 9,10-diphenylanthracene (DPA) and poly[2-methoxy-5-(2‘-ethylhexyloxy)-1,4-phenylenevinylene] [Meh-PPV (P-3)] were also ...
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