PINAUD, Julien; TRINH, Thi Kim Hoang; SAUVANIER, David; PLACET, Emeline; SONGSEE, Sriprapai; LACROIX-DESMAZES, Patrick; BECHT, Jean-Michel; TARABLSI, Bassam; LALEVEE, Jacques; PICHAVANT, Loïc; HÉROGUEZ, Valérie; CHEMTOB, Abraham

doi:10.1002/chem.201705145

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PINAUD, Julien
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM ICMMM]

TRINH, Thi Kim Hoang
Institut de Science des Matériaux de Mulhouse [IS2M]

SAUVANIER, David
Laboratoire de Chimie des Polymères Organiques [LCPO]

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Chemistry - A European Journal. 2018, vol. 24, p. 337-341

Wiley-VCH Verlag

Resumen en inglés

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(p-cymene)]2 precatalyst, the highly active RuCl2(p-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.< Leer menos