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A Click Chemistry Strategy for the Synthesis of Efficient Photoinitiators for Two‐Photon Polymerization
Author(s) -
Henning Irene,
Woodward Adam W.,
Rance Graham A.,
Paul Benjamin T.,
Wildman Ricky D.,
Irvine Derek J.,
Moore Jonathan C.
Publication year - 2020
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202006108
Subject(s) - polymerization , click chemistry , materials science , photoinitiator , cycloaddition , azide , photopolymer , photochemistry , polymer chemistry , chemical engineering , polymer , chemistry , organic chemistry , catalysis , composite material , monomer , engineering
It is reported that efficient photoinitiators, suitable for two‐photon polymerization, can be obtained using the copper catalyzed azide/alkyne cycloaddition reaction. This click chemistry strategy provides a modular approach to the assembly of photoinitiators that enables the rapid variation of key fragments to produce photoinitiators with desirable properties. To assess the performance of the first‐in‐class photoinitiators generated by this approach, a screening method is developed to enable the rapid determination of polymerization and damage thresholds in numerous photoresists during two‐photon polymerization. The degree of consumption of vinyl groups (DC) and homogeneity of the polymerization are further assessed by micro‐Raman spectroscopy. Finally, more complex structures are fabricated to demonstrate that the efficient two‐photon polymerization of stable 3D microarchitectures can be achieved using triazole‐based photoinitiators.