Investigation of poly(arylenevinylene)s, 24. High‐resolution solid‐state ¹³C NMR spectroscopy of poly(1,4‐phenylenevinylene)s

Abstract

Abstract High‐resolution 13 C NMR spectra of solid poly(1,4‐phenylenevinylene), poly(1,4‐phenylene‐1,2‐diphenylvinylene) and of three related, substituted polymers (CN, OCH 3 , O) were obtained with a combined technique of heteronuclear decoupling, cross‐polarization and magic angle spinning. The reported chemical shifts were assigned by means of solid model compounds ( trans ‐stilbene, trans , trans ‐1,4‐distyrylbenzene, tetraphenylethylene). Utilizing the high sensitivity of 13 C NMR chemical shifts to chemical structure, this method is applied to structure confirmation, the determination of sp 3 ‐defects in poly(phenylenevinylene)s PPV, and the determination of sterical and electronical effects of phenyl and phenylene groups.