title: Dual-pathway chain-end modification of RAFT polymers using visible light and metal-free conditions.
abstract: We report a metal-free strategy for the chain-end modification of RAFT polymers utilizing visible light. By turning the light source on or off, the reaction pathway in one pot can be switched between either complete desulfurization (hydrogen chain-end) or simple cleavage (thiol chain-end), respectively. The versatility of this process is exemplified by application to a wide range of polymer backbones under mild, quantitative conditions using commercial reagents.
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, USA and Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA. hawker@mrl.ucsb.edu.
authors.forename: Emre H
authors.initials: EH
authors.lastname: Discekici
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, USA.
authors.forename: Shelby L
authors.initials: SL
authors.lastname: Shankel
authors.affiliation: Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA. hawker@mrl.ucsb.edu.
authors.forename: Athina
authors.initials: A
authors.lastname: Anastasaki
authors.affiliation: Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA. hawker@mrl.ucsb.edu.
authors.forename: Bernd
authors.initials: B
authors.lastname: Oschmann
authors.affiliation: Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA. hawker@mrl.ucsb.edu.
authors.forename: In-Hwan
authors.initials: IH
authors.lastname: Lee
authors.affiliation: Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA. hawker@mrl.ucsb.edu.
authors.forename: Jia
authors.identifier: http://orcid.org/0000-0002-5622-6362
authors.initials: J
authors.lastname: Niu
authors.affiliation: Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA. hawker@mrl.ucsb.edu.
authors.forename: Alaina J
authors.initials: AJ
authors.lastname: McGrath
authors.affiliation: The Dow Chemical Company, Midland, Michigan 48674, USA.
authors.forename: Paul G
authors.initials: PG
authors.lastname: Clark
authors.affiliation: The Dow Chemical Company, Midland, Michigan 48674, USA.
authors.forename: David S
authors.initials: DS
authors.lastname: Laitar
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, USA and Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA. hawker@mrl.ucsb.edu.
authors.forename: Javier Read
authors.initials: JR
authors.lastname: de Alaniz
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, USA and Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA. hawker@mrl.ucsb.edu and Materials Department, University of California, Santa Barbara, California 93106, USA.
authors.forename: Craig J
authors.identifier: http://orcid.org/0000-0001-9951-851X
authors.initials: CJ
authors.lastname: Hawker
authors.affiliation: Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA. hawker@mrl.ucsb.edu and Department of Chemistry, University of Oxford, Oxford OX1 3TA, UK.
authors.forename: David J
authors.initials: DJ
authors.lastname: Lunn