title: Supramolecular alternating block copolymers via metal coordination.
abstract: A bimetallic ruthenium olefin metathesis initiator was synthesized and used to polymerize functionalized norbornenes, affording polymers that are living at both polymer chain-ends. Using this bis-ruthenium initiator strategy and combining it with functional chain-terminators, highly-efficient syntheses of either SCS-Pd(II) pincer- or pyridine-functionalized symmetrical telechelic polymers were developed. The terminal functional group incorporation was confirmed by 1H NMR spectroscopy analyses. The telechelic polymers were self-assembled into block copolymers by means of metal coordination between corresponding terminal recognition units. The self-assembly process was monitored by 1H NMR spectroscopy revealing nearly quantitative functionalization. The resulting supramolecular block copolymers were further characterized by viscometry and dynamic light scattering.
authors.affiliation: Department of Chemistry and Molecular Design Institute, New York University, 100 Washington Square East, New York, NY 10003, USA.
authors.forename: Si Kyung
authors.initials: SK
authors.lastname: Yang
authors.forename: Ashootosh V
authors.initials: AV
authors.lastname: Ambade
authors.forename: Marcus
authors.initials: M
authors.lastname: Weck
mesh_terms: D000475:Alkenes / Q000737:chemistry; D002625:Chemistry, Organic / Q000379:methods*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry; D012428:Ruthenium / Q000737:chemistry*
chemical_list: D000475:Alkenes; D011108:Polymers; D012428:Ruthenium