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- Title
In Situ Generated Ruthenium–Arene Catalyst for Photoactivated Ring‐Opening Metathesis Polymerization through Photolatent N‐Heterocyclic Carbene Ligand.
- Authors
Pinaud, Julien; Trinh, Thi Kim Hoang; Sauvanier, David; Placet, Emeline; Songsee, Sriprapai; Lacroix‐Desmazes, Patrick; Becht, Jean‐Michel; Tarablsi, Bassam; Lalevée, Jacques; Pichavant, Loïc; Héroguez, Valérie; Chemtob, Abraham
- Abstract
Abstract: 1,3‐Bis(mesityl)imidazolium tetraphenylborate (IMesH+ BPh4−) can be synthesized in one step by anion metathesis between the corresponding imidazolium chloride and sodium tetraphenylborate. In the presence of 2‐isopropylthioxanthone (sensitizer), an IMes N‐heterocyclic carbene (NHC) ligand can be photogenerated under irradiation at 365 nm through coupled electron/proton transfer reactions. By combining this tandem NHC photogenerator system with metathesis inactive [RuCl2(<italic>p</italic>‐cymene)]2 precatalyst, the highly active RuCl2(<italic>p</italic>‐cymene)(IMes) complex can be formed in situ, enabling a complete ring‐opening metathesis polymerization (ROMP) of norbornene in the matter of minutes at room temperature. To the best of our knowledge, this is the first example of a photogenerated NHC. Its exploitation in photoROMP has resulted in a simplified process compared to current photocatalysts, because only stable commercial or easily synthesized reagents are required.
- Subjects
RUTHENIUM; AROMATIC compounds; PHOTOACTIVATION; POLYMERIZATION; CARBENE derivatives
- Publication
Chemistry - A European Journal, 2018, Vol 24, Issue 2, p337
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201705145