Squeezing organic conjugated molecules - What does one learn?
The effects of hydrostatic pressure on conjugated polymers, in particular polyphenyls (see Figure for monomer unit) have been studied using photoluminescence, absorption, photo-induced absorption, and Raman spectroscopy. The effect of pressure on the singlet and triplet excitons and polarons allows an understanding of localized and delocalized electronic states. Changes in the intensity ratios of Raman bands that correspond to vibrations of a perpendicular and a coplanar array of phenyl rings in the chain, and comparison with calculated intensities, demonstrate the influence of pressure on the polymer's conformation.
Physics, Astronomy, and Materials Science
Chandrasekhar, Meera, Suchi Guha, and Wilhelm Graupner. "Squeezing organic conjugated molecules—What does one learn?." Advanced Materials 13, no. 8 (2001): 613-618.