A phase-separated approach to photooxidations that employs a liquid at a solid/liquid or solid/gas/liquid interface has been developed. These biphasic and triphasic photosensitizer systems contain regions that are controllably dry, partly wetted, and/or fully wetted. The talk will focus on a superhydrophobic surface synthesized by partially embedding porous silicon phthalocyanine or fumed chlorin-attached sensitizing particles to specific locations on polydimethylsiloxane posts 3D-printed in a square array. In the presence of red light and oxygen, singlet oxygen is formed on the superhydrophobic surface and reacts with compounds or bacteria. The results indicate that the superhydrophobic sensitizer surface offers a unique system to study singlet oxygen transfer where a balance of gas and liquid contributions of singlet oxygen is tunable within the same surface. The system may be of practical importance for delivering singlet oxygen in a localized and controllable fashion for water purification and medical devices.<br/>

3D printed sensitizer surface for photooxidation chemistry: Aspects on water disinfection

251st National Meeting (2016)

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