Raman and IR spectroscopic investigation of aromatic 1,3,4-oxadiazole polymers and oligomers
- The molecular structure of poly(p-phenylene-1,3,4-oxadiazole) (POD) is investigated using i.r. and Raman spectroscopy. Both methods reveal characteristic differences for the a- and b-POD forms that are most obvious in the spectral region between 1500 and 1650 cm-1. The spectra for dimer and tetramer compounds already show the same features as found for longer chains. Based on molecular modelling calculations these differences are assigned to cis and trans conformations of the main chain segments. High pressure measurements show a linear shift of the Raman lines and support the result of the thermodynamic stability of the trans conformation.
| Verfasserangaben: | Ingo Orgzall, Bernd Lorenz, Jürgen E. R. Mikat, Reinhard Dietel, Gerald Knochenhauer, Burkhard SchulzORCiDGND |
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| Publikationstyp: | Wissenschaftlicher Artikel |
| Sprache: | Englisch |
| Jahr der Erstveröffentlichung: | 1997 |
| Erscheinungsjahr: | 1997 |
| Datum der Freischaltung: | 24.03.2017 |
| Quelle: | Polymer. - 38 (1997), 7, S. 1537 - 1543 |
| Organisationseinheiten: | Zentrale und wissenschaftliche Einrichtungen / Interdisziplinäres Zentrum für Dünne Organische und Biochemische Schichten |
