Observation of the Missing Mode Effect in a PolyPhenylenevinylene Derivative: Effect of Solvent,
Chain Packing and Composition
Adam J. Wise, Thomas P. Martin, Jian Gao, Kori VanDerGeest, John K. Grey *
Department of Chemistry and Chemical Biology, University of New Mexico, MSC03
2060, Albuquerque, NM 87131
Email: jkgrey@unm.edu
SUPPORTING INFORMATION
S1
A cursory vibronic analysis was performed on each sample form to verify the range of
the MIME frequency. The dominant progression frequency interval and displacement
was adjusted until a good fit was obtained.
S2
Fig. S2. Single effective coordinate solution spectra fits obtained by fitting the observed
progression frequency interval and displacement for each solvent described in the text.
Fig. S2. Excitation spectra for MDMO-PPV in chlorobenzene (CB), chloroform (CF),
and acetone (AC). Spectral maxima are shifted to zero energy to estimate linewidths for
scaling relative vibrational displacements determined from pre-resonance Raman
spectroscopy.
Fig. S3. Effective mode spectra calculations for MDMO-PPV nanoparticles (top panel)
and bulk thin films (bottom panel).
S3
Fig. S4. Effective mode calculation for MDMO-PPV/PCBM blend thin films to illustrate
the large change in the observed progression interval.
Fig. S5. Representative emission intensity transients of MDMO-PPV nanoparticles
generated with 488 nm excitation at ~10 W/cm2. Timescales of transients were ~3×
longer than those used to measure spectra.
S4
Fig. S6. Pristine MDMO-PPV film annealed for a long period of time (~30 min).
S5