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Medientyp: E-Artikel Titel: One‐ and two‐photon activity of cross‐conjugated photoinitiators with bathochromic shift Beteiligte: Heller, Christian; Pucher, Niklas; Seidl, Bernhard; Kalinyaprak‐Icten, Kadiriye; Ullrich, Gerald; Kuna, Ladislav; Satzinger, Valentin; Schmidt, Volker; Lichtenegger, Helga C.; Stampfl, Jürgen; Liska, Robert Erschienen: Wiley, 2007 Erschienen in: Journal of Polymer Science Part A: Polymer Chemistry Sprache: Englisch DOI: 10.1002/pola.22078 ISSN: 1099-0518; 0887-624X Schlagwörter: Materials Chemistry ; Organic Chemistry ; Polymers and Plastics Entstehung: Anmerkungen: Beschreibung: <jats:title>Abstract</jats:title><jats:p>Intrigued by the good performance of 1,5‐diphenylpenta‐1,4‐diyn‐3‐one (<jats:bold>DPD</jats:bold>) as photoinitiator for radical polymerization we prepared and investigated several donor substituted derivatives. UV‐Vis spectroscopy revealed a gradual red‐shift of λ<jats:sub>max</jats:sub> and higher extinction in the order of the donor capability. A methoxy‐substituted derivative (<jats:bold>O‐DPD</jats:bold>) exhibited significant photoinitiation activity in photo‐DSC experiments. Steady state photolysis experiments showed decreased decomposition rates with increasing donor capability. A dimethylamino derivative <jats:bold><jats:italic>N</jats:italic>‐DPD</jats:bold> was even photostable under these conditions. Because of to the D‐π‐A‐π‐D system of these compounds two‐photon induced 3D photopolymerization experiments were performed and <jats:bold><jats:italic>N</jats:italic>‐DPD</jats:bold> showed outstanding performance compared to often applied single photon initiators. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 3280–3291, 2007</jats:p>