Effect of molecular weight on the vibronic structure of a diketopyrrolopyrrole polymer
AuthorHayes, Sophia C.
Pieridou, Galatia K.
SourceProceedings of SPIE - The International Society for Optical Engineering
Physical Chemistry of Interfaces and Nanomaterials XV
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Resonance Raman Spectroscopy (RRS) is employed in this study to examine the influence of molecular weight on the optical response of a diketopyrrolopyrrole polymer (DPP-TT-T) in solution. The vibronic structure observed for the ground state absorption of this polymer is found to vary with molecular weight and solvent. Resonance Raman Intensity Analysis (RRIA) revealed that the absorption spectra can be described by at least two dipole-allowed transitions and the vibronic structure variation is due to differing contributions from linear and curved segments of the polymer. © 2016 SPIE.