Photoinitiators for radical polymerization have been successfully utilized for many years. Nevertheless, the need for rather specific applications leads to new developments in this field. In this contribution, I will show our recent work showing mechanistic and applied aspects of novel photo-initiating systems: 1. Our collaboration with the group of Christopher Barner-Kowollik (Brisbane) has been oriented into establishing the effects of the wavelength dependent reactivity of initiators. 2. Joint work with Hansjörg Grützmacher (ETHZ) and his group has led to the development of wave-length-selective initiators, which produce miktoarm (3 arms) star polymers via radical polymerization. Moreover, we have explored rather unexpected reactions of phosphorus-based initiators in aqueous solution. 3. The rather specific features of Ge-based initiators will be shown (with Harald Stüger, Graz). 4. With the above knowledge, we have found a simple access to obtain quantum efficiencies and promoted a model for a rapid assessment of photo-initiating systems.

Photoinitiators: Reactivity, efficiency, and wavelength dependence

2019 Spring National Meeting

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