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Novel Highly Potential Initiators for the Two-Photon-Induced Photopolymerization Process

  • Niklas Pucher (a1), Valentin Satzinger (a2), Arnulf Rosspeintner (a3), Georg Gescheidt (a4), Volker Schmidt (a5), Jürgen Stampfl (a6) and Robert Liska (a7)...

Abstract

The development of new optimized photoinitiators for the two-photon induced photopolymerization (TPIP) is essential in order to obtain high resolutions in this solid freeform fabrication process. Herein, we present the syntheses and characterizations of a series of efficient photoinitiators, comprising of a cross conjugated D-π-A-π-D system. The different donor- and acceptor functionalities of the investigated photoinitiators as well as the synthesis of targeted derivatives containing double and triple bonds in the conjugated backbone allowed the evaluation of structure-activity relationships. The basic photophysical properties as well as the activity and ideal processing window under TPIP conditions were investigated for each initiator and compared with typical commercially available one-photon initiator and with two highly potential initiators well known from literature. These tests figured out that the new chromophores are highly potential even at concentrations down to 0.05 wt%.

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Novel Highly Potential Initiators for the Two-Photon-Induced Photopolymerization Process

  • Niklas Pucher (a1), Valentin Satzinger (a2), Arnulf Rosspeintner (a3), Georg Gescheidt (a4), Volker Schmidt (a5), Jürgen Stampfl (a6) and Robert Liska (a7)...

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