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Synthesis, optical and initiating properties of new two-photon polymerization initiators: 2,7-Bis(styryl)anthraquinone derivatives

Paper ID Volume ID Publish Year Pages File Format Full-Text
29291 44143 2007 7 PDF Available
Title
Synthesis, optical and initiating properties of new two-photon polymerization initiators: 2,7-Bis(styryl)anthraquinone derivatives
Abstract

C2v symmetrical anthraquinone derivatives, 2,7-bis(2-(4-dimethylamino-phenyl)-vinyl)anthraquinone (1) and 2,7-bis(2-(4-methoxy-phenyl)-vinyl)anthraquinone (2) were synthesized by Wittig reaction. Their one-photon absorption and fluorescence, as well as two-photon absorption properties were investigated. These compounds showed strong intramolecular charge transfer bands as well as low fluorescence quantum yield. 1 showed a larger two-photon absorption cross-section of 1635 GM than that of 995 GM for 2 at the wavelength of 800 nm. Furthermore, the initiating properties of 1 and 2 were studied by two-photon induced polymerization. The resin with 1 as photoinitiator (R1) possessed higher sensitivity with a threshold energy 3.67 mW at the concentration of 0.02 wt% compared to that of 8.03 mW for 2. The resolution of polymer line, fabricated with R1 at the threshold with the linear scan speed of 50 μm/s, is 105 nm. This investigation on the relationship of resolution and sensitivity indicated higher sensitivity benefit to the improvement of microfabrication resolution.

Keywords
Two-photon absorption; Anthraquinone derivatives; Two-photon polymerization
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Synthesis, optical and initiating properties of new two-photon polymerization initiators: 2,7-Bis(styryl)anthraquinone derivatives
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 189, Issues 2–3, 25 June 2007, Pages 398–404
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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