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

Published online by Cambridge University Press:  31 January 2011

Niklas Pucher ,
Valentin Satzinger ,
Arnulf Rosspeintner ,
Georg Gescheidt ,
Volker Schmidt ,
Jürgen Stampfl  and
Robert Liska
Niklas Pucher
Affiliation:
niklas.pucher@ias.tuwien.ac.at, TU Vienna, Institute of Applied Synthetic Chemistry, Vienna, Austria
Valentin Satzinger
Affiliation:
valentin.satzinger@joanneum.at, Joanneum Research, Institute of Nanostructured Materials and Photonics, Vienna, Austria
Arnulf Rosspeintner
Affiliation:
rosspeintner@tugraz.at, TU Graz, Institute of Physical and Theoretical Chemistry, Graz, Australia
Georg Gescheidt
Affiliation:
gescheidt@ptc.tugraz.at, TU Graz, Institute of Physical and Theoretical Chemistry, Graz, Austria
Volker Schmidt
Affiliation:
volker.schmidt@joanneum.at, Joanneum Research, Institute of Nanostructured Materials and Photonics, Weiz, Austria
Jürgen Stampfl
Affiliation:
stampfl@pop.tuwien.ac.at, TU Vienna, Institute of Materials Science and Technology, Vienna, Austria
Robert Liska
Affiliation:
robert.liska@tuwien.ac.at, TU Vienna, Institute of Applied Synthetic Chemistry, Vienna, Austria
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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%.

Keywords

laser-induced reactionphotochemicalpolymerization
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1179: Symposium BB – Material Systems and Processes for Three-Dimentional Micro-and Nanoscale Fabrication and Lithography , 2009 , 1179-BB06-15
Copyright
Copyright © Materials Research Society 2009

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References

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