An accessible visible-light actinometer for the determination of photon flux and optical pathlength in flow photo microreactors
| Autor: | Anca Roibu, M. Enis Leblebici, Glen Meir, Simon Kuhn, Tom Van Gerven, Senne Fransen |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Photoisomerization lcsh:Medicine Context (language use) 010402 general chemistry NM 01 natural sciences OXYGEN Article law.invention chemistry.chemical_compound DIARYLETHENES Diarylethene law lcsh:Science Reproducibility Science & Technology Multidisciplinary Actinometer 010405 organic chemistry business.industry CHEMICAL ACTINOMETRY lcsh:R 0104 chemical sciences Characterization (materials science) Multidisciplinary Sciences chemistry QUANTUM YIELDS Science & Technology - Other Topics Optoelectronics SINGLE-CRYSTALS lcsh:Q Microreactor business Visible spectrum |
| Zdroj: | Scientific Reports Scientific Reports, Vol 8, Iss 1, Pp 1-10 (2018) |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-018-23735-2 |
| Popis: | Coupling photochemistry with flow microreactors enables novel synthesis strategies with higher efficiencies compared to batch systems. Improving the reproducibility and understanding of the photochemical reaction mechanisms requires quantitative tools such as chemical actinometry. However, the choice of actinometric systems which can be applied in microreactors is limited, due to their short optical pathlength in combination with a large received photon flux. Furthermore, actinometers for the characterization of reactions driven by visible light between 500 and 600 nm (e.g. photosensitized oxidations) are largely missing. In this paper, we propose a new visible-light actinometer which can be applied in flow microreactors between 480 and 620 nm. This actinometric system is based on the photoisomerization reaction of a diarylethene derivative from its closed to the open form. The experimental protocol for actinometric measurements is facile and characterized by excellent reproducibility and we also present an analytical estimation to calculate the photon flux. Furthermore, we propose an experimental methodology to determine the average pathlength in microreactors using actinometric measurements. In the context of a growing research interest on using flow microreactors for photochemical reactions, the proposed visible-light actinometer facilitates the determination of the received photon flux and average pathlength in confined geometries. ispartof: SCIENTIFIC REPORTS vol:8 issue:1 ispartof: location:England status: published |
| Databáze: | OpenAIRE |
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