New Synthetic Route to an Highly Efficient Photoredox Catalyst by Mechanosynthesis.

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ID: 26439
2018
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Abstract
Photoredox catalysis based on the [Cu(neo)(DPEphos)]BF copper complex allowed getting a significant improvement of the polymerization performances (e.g., thick samples, coatings...) compared to that obtained with other benchmarked photoinitiators in both cationic (CP) and free radical polymerizations (FRP). Nevertheless, as for other copper complexes classically used as photoinitiators in polymer science, the synthesis of these complexes is carried out in a solvent; this fact remains an obstacle to their widespread use because of the cost associated with the use of a solvent and the complex synthesis procedure. In the present study, on the contrary, an outstanding efficient mechanosynthesis of [Cu(neo)(DPEphos)]BF-purity ≥95% outranking the previous Cu(I) mechanosynthesis-allowed (i) to divide the synthesis time by 170-fold (as only 5 min is necessary to get the complex), (ii) to lower the environmental impact and cut the synthetic costs associated with solvent usage, and (iii) to access a new Cu(I) complex with a counteranion that is impossible to introduce under the traditional chemistry methods (e.g., I). Reactivities of the mechanosynthesized copper complexes in resins (FRP and CP) confirmed the very high purity of the obtained copper complex by H nuclear magnetic resonance spectroscopy and high-resolution electrospray ionization mass spectrometry.
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garra2018newacs Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Garra, Patxi;Dumur, Frédéric;Mokbel, Haifaa;Monnier, Valérie;Morlet-Savary, Fabrice;Dietlin, Céline;Gigmes, Didier;Fouassier, Jean-Pierre;Lalevée, Jacques;
Journal ACS omega
Year 2018
DOI
10.1021/acsomega.8b01586
URL
http://dx.doi.org/10.1021/acsomega.8b01586
Keywords Keywords not found

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