TRINH, Thi Kim Hoang; SCHRODJ, Gautier; RIGOLET, Séverinne; PINAUD, Julien; LACROIX-DESMAZES, Patrick; PICHAVANT, Loïc; HÉROGUEZ, Valérie; CHEMTOB, Abraham

doi:10.1039/c9ra05831a

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

SCHRODJ, Gautier
Institut de Science des Matériaux de Mulhouse [IS2M]
Université de Strasbourg [UNISTRA]

RIGOLET, Séverinne
Institut de Science des Matériaux de Mulhouse [IS2M]
Université de Strasbourg [UNISTRA]

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Ce document a été publié dans

RSC Advances. 2019, vol. 9, n° 48, p. 27789-27799

Royal Society of Chemistry

Résumé en anglais

Although metathesis photoinduced catalysis is now well established, there is little development in thin film preparation using photochemically activated ring-opening metathesis polymerization (ROMP). Herein, a N-heterocyclic carbene (NHC) photogenerator (1,3-bis(mesityl)imidazolium tetraphenylborate) is combined with an inactive metathesis catalyst ([RuCl2(p-cymene)]2) to generate under UV irradiation an active catalyst (p-cymene)RuCl2 (NHC), that is capable of producing in a single step cross-linked copolymer films by ROMP of norbornene with dicyclopentadiene. The study shows that the photoinitiated catalytic system can be optimized by increasing the yield of photogenerated NHC through a sensitizer (2-isopropylthioxanthone), and by choosing [RuI2(p-cymene)]2 as precatalyst to provide a long-term photolatency. The cross-linked polymer structure is investigated by a range of techniques including gel content measurement, FT-IR and solid-state 13C NMR spectroscopy, TGA and DSC, which reveal a cross-linking mechanism proceeding through both metathesis and olefin coupling.< Réduire