Recent Advances in Type I Photoinitiators for Visible Light Induced Photopolymerization

Stefanie Monika Müller; Sandra  Schlögl; Tanja Wiesner; Michael Haas; Thomas Grießer

doi:10.1002/cptc.202200091

Recent Advances in Type I Photoinitiators for Visible Light Induced Photopolymerization

Stefanie Monika Müller, Sandra Schlögl, Tanja Wiesner, Michael Haas^*, Thomas Grießer^*

^*Corresponding author for this work

Institute of Inorganic Chemistry (6330)

Research output: Contribution to journal › Review article › peer-review

Abstract

Photopolymerization and its application in the dental, three-dimensional (3D) printing, coating and electronic industry has become increasingly popular over the last decades. A huge variety of photoinitiators (PIs) and photoinitiating systems (PISs) have been developed that are able to generate reactive species, e. g. radicals, radical cations, and cations upon light absorption. In this Review, we focus on radical-generating Type I PIs which undergo homolytic cleavage after irradiation with visible light. The possibility to utilize electromagnetic irradiation above 400 nm for the initiation of polymerization reactions provides several advantages such as a lower energy demand and higher curing depths in pigmented reactive systems. Recent developments of PIs based on phosphorus and group 14 elements as well as other selected concepts for Type I visible light initiators are outlined and discussed within this review.

Original language	English
Article number	e202200091
Journal	ChemPhotoChem
Volume	6
Issue number	11
Early online date	27 Jun 2022
DOIs	https://doi.org/10.1002/cptc.202200091
Publication status	Published - Nov 2022

Keywords

3D printing
germanium
phosphorus
photoinitiators
polymerization
silicon
visible light

ASJC Scopus subject areas

Analytical Chemistry
Physical and Theoretical Chemistry
Organic Chemistry

Access to Document

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Cite this

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title = "Recent Advances in Type I Photoinitiators for Visible Light Induced Photopolymerization",

abstract = "Photopolymerization and its application in the dental, three-dimensional (3D) printing, coating and electronic industry has become increasingly popular over the last decades. A huge variety of photoinitiators (PIs) and photoinitiating systems (PISs) have been developed that are able to generate reactive species, e. g. radicals, radical cations, and cations upon light absorption. In this Review, we focus on radical-generating Type I PIs which undergo homolytic cleavage after irradiation with visible light. The possibility to utilize electromagnetic irradiation above 400 nm for the initiation of polymerization reactions provides several advantages such as a lower energy demand and higher curing depths in pigmented reactive systems. Recent developments of PIs based on phosphorus and group 14 elements as well as other selected concepts for Type I visible light initiators are outlined and discussed within this review.",

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