A new solution to an old problem

• Verfasst von: Abdulkarim, Ali [VerfasserIn]
• Verfasst von: Hinkel, Felix Peter [VerfasserIn]
• Verfasst von: Jänsch, Daniel [VerfasserIn]
• Verfasst von: Freudenberg, Jan [VerfasserIn]
• Verfasst von: Golling, Florian Ernst [VerfasserIn]
• Titel: A new solution to an old problem
• Titelzusatz: synthesis of unsubstituted poly(para-phenylene)
• Verf.angabe: Ali Abdulkarim, Felix Hinkel, Daniel Jänsch, Jan Freudenberg, Florian E. Golling, and Klaus Müllen
• E-Jahr: 2016
• Jahr: 9 December 2016
• Umfang: 4 S.
• Fussnoten: Gesehen am 20.07.2020
• Titel Quelle: Enthalten in: American Chemical SocietyJournal of the American Chemical Society
• Ort Quelle: Washington, DC : American Chemical Society, 1879
• Jahr Quelle: 2016
• Band/Heft Quelle: 138(2016), 50, Seite 16208-16211
• ISSN Quelle: 1520-5126
• DOI: doi:10.1021/jacs.6b10254
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1725128810

Abstract

Unsubstituted and structurally well-defined poly(para-phenylene) (PPP) has been long-desired as an organic semiconductor prototype of conjugated polymers. To date, several attempts to synthesize unsubstituted, pristine, high-molecular-weight PPP have failed. Here we solved this synthetic problem by a versatile precursor route. Suzuki polymerization of kinked disubstituted 1,4-dimethoxycyclohexadienylene monomers yielded a well-soluble, nonaromatic precursor polymer. Its solubility allowed processing by spin-coating into nanometer-thick films. Subsequent additive-free thermal treatment induced aromatization and led to exclusively para-connected, highly fluorescent PPP with a length of about 75 phenylene units.