Solvent effects on the intramolecular charge transfer character of N ,N -diaryl dihydrophenazine catalysts for organocatalyzed atom transfer radical polymerization
| Autor: | Matthew D. Ryan, Jordan C. Theriot, Sarah R. Lincoln, Charles B. Musgrave, Chern-Hooi Lim, Haishen Yang, Nathaniel G. Garrison, Garret M. Miyake, Andrew G. Lockwood |
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| Rok vydání: | 2017 |
| Předmět: |
Polymers and Plastics
010405 organic chemistry Atom-transfer radical-polymerization Chemistry Radical Organic Chemistry Dispersity Context (language use) 010402 general chemistry Photochemistry 01 natural sciences 0104 chemical sciences Photopolymer Excited state Intramolecular force Materials Chemistry Solvent effects |
| Zdroj: | Journal of Polymer Science Part A: Polymer Chemistry. 55:3017-3027 |
| ISSN: | 0887-624X |
| DOI: | 10.1002/pola.28574 |
| Popis: | The nature of intramolecular charge transfer (CT) of N,N-diaryl dihydrophenazine photocatalysts (PCs) in different solvents is explored in context of their performance in organocatalyzed atom transfer radical polymerization (O-ATRP). PCs having a computationally predicted lowest energy excited state exhibiting CT character can operate a highly controlled O-ATRP in a wide range of solvent polarities, from non-polar hexanes to highly polar N,N-dimethylacetamide. For PCs having a computationally predicted lowest energy excited state not possessing CT character, their ability to operate a controlled O-ATRP is decreased. This study confirms the importance of CT character in the excited state for N,N-diaryl dihydrophenazine PCs, and a deeper understanding of the activity of CT PCs has enabled the synthesis of polymers of low dispersity ( |
| Databáze: | OpenAIRE |
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