ISSN:
0887-624X
Schlagwort(e):
poly-para-phenylene
;
quinoid structure
;
IR spectroscopy
;
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
The structure of vacuum-deposited poly-para-phenylene (PPP) films prepared from a high-molecular-weight PPP powder has been investigated by IR spectroscopy. It has been demonstrated that in IR spectra of PPP films exhibiting intense luminescence an extremely strong band at 1375 cm-1 is observed, which is not typical for currently known PPP modifications. Based on the IR spectral data, the model of formation of a PPP chain with quinoid fragments in the ground electronic state is proposed. The structure of defects that inevitably spring up during the benzenoid-quinoid transition is discussed. High intensity of the band at 1375 cm-1 is associated with the change in the order of the “defect” C—C bond between adjacent quinoid and benzenoid units. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 1043-1052, 1998
Zusätzliches Material:
6 Ill.
Materialart:
Digitale Medien
