title: Highly tin-selective stille coupling: synthesis of a polymer containing a stannole in the main chain.
abstract: The incorporation of heavier Group 14 element heteroles into semiconducting polymers leads to unusual optoelectronic properties. However, polymers containing stannoles have not been accessible to date. We report a synthetic route to a well-defined, stannole-containing polymer, the first example of this class of π-conjugated polymers. This route was made possible by developing difunctionalized stannole monomers and highly tin-selective Stille coupling reactions that leave the tin in the stannole untouched. Compared to poly(3-n-hexylthiophene), the resulting polymer displays a remarkable bathochromic shift in its absorption.
authors.affiliation: Otto-Diels-Institut für Organische Chemie, Universität Kiel, 24098 Kiel (Germany).
authors.forename: Julian
authors.initials: J
authors.lastname: Linshoeft
authors.forename: Evan J
authors.initials: EJ
authors.lastname: Baum
authors.forename: Andreas
authors.initials: A
authors.lastname: Hussain
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Gates
authors.forename: Christian
authors.initials: C
authors.lastname: Näther
authors.forename: Anne
authors.initials: A
authors.lastname: Staubitz
keywords: cross-coupling; main-group elements; semiconducting polymers; stannanes; stannoles