The Raman spectra of methyl substituted ladder type poly( p-phenylene) : Theoretical and experimental investigations

• Published in: Synthetic metals Vol. 138; no. 1; pp. 39 - 42
• Main Authors: Somitsch, D., Wenzl, F.P., Kreith, J., Pressl, M., Kaindl, R., Scherf, U., Leising, G., Knoll, P.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 02.06.2003; Amsterdam Elsevier Science; New York, NY
• Subjects: ab initio calculations; Applied sciences; Exact sciences and technology; Ladder type poly( p-phenylene); Organic polymers; Physicochemistry of polymers; Properties and characterization; Raman scattering cross-section; Resonant Raman spectroscopy; Structure, morphology and analysis; Resonant Raman spectroscopy; Raman scattering cross-section; ab initio calculations; Ladder type poly( p-phenylene); Arylene polymer; Solid state; Conjugated polymer; Chemical solution; Resonance Raman scattering; Diffusion spectra; Ab initio calculations; Experimental study; Ladder polymer; Ladder type poly(p-phenylene)
• ISSN: 0379-6779; 1879-3290
• DOI: 10.1016/S0379-6779(02)01266-3

We report on the Raman behavior of methyl substituted ladder type poly( p-phenylene) (mLPPP), a conjugated polymer with a high application potential for optoelectronic devices. A funded explanation of the experimentally observed Raman modes based on ab initio calculations is given, which takes also the influence of the side chains into account. Experimental investigations were performed with different laser excitation wavelengths on mLPPP in solution and films drop-casted on silicon substrates. From the studies of the polymer in solution the differential Raman scattering cross-section of mLPPP were determined on the basis of the known values of different solvents.