title: A Light-Activated Olefin Metathesis Catalyst Equipped with a Chromatic Orthogonal Self-Destruct Function.
abstract: A sulfur-chelated photolatent ruthenium olefin metathesis catalyst has been equipped with supersilyl protecting groups on the N-heterocyclic carbene ligand. The silyl groups function as an irreversible chromatic kill switch, thus decomposing the catalyst when it is irradiated with 254 nm UV light. Therefore, different types of olefin metathesis reactions may be started by irradiation with 350 nm UV light and prevented by irradiation with shorter wavelengths. The possibility to induce and impede catalysis just by using light of different frequencies opens the pathway for stereolithographic applications and novel light-guided chemical sequences.
authors.affiliation: Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105 (Israel).|Department of Natural Sciences, The Open University of Israel, Raanana 43537 (Israel).
authors.forename: Revannath L
authors.initials: RL
authors.lastname: Sutar
authors.affiliation: Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105 (Israel).
authors.forename: Efrat
authors.initials: E
authors.lastname: Levin
authors.affiliation: Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105 (Israel).
authors.forename: Danielle
authors.initials: D
authors.lastname: Butilkov
authors.affiliation: Department of Chemistry, Tel-Aviv University, Tel Aviv (Israel).
authors.forename: Israel
authors.initials: I
authors.lastname: Goldberg
authors.affiliation: Department of Natural Sciences, The Open University of Israel, Raanana 43537 (Israel).
authors.forename: Ofer
authors.initials: O
authors.lastname: Reany
authors.affiliation: Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105 (Israel). lemcoff@bgu.ac.il.
authors.forename: N Gabriel
authors.initials: NG
authors.lastname: Lemcoff
keywords: N-heterocyclic carbenes; metathesis; photochemistry; polymerization; ruthenium