Optical spectroscopic studies of a soluble fluorene-based conjugated polymer: A hydrostatic pressure and temperature study
Spectroscopic properties of conjugated molecules/polymers have varying degrees of sensitivity to backbone conformation. Optical studies are presented as a function of temperature and hydrostatic pressure, using photoluminescence and Raman scattering from two polymers with distinct differences in their backbone conformation, namely, polyfluorene (PF) and ladder type poly(para-phenylene)(m-LPPP). In contrast to the photoluminescence (PL) vibronics in mLPPP, the 0-0 PL vibronic peak in PF shows a red-shift with increasing temperatures. Pressure studies reveal that the PL spectrum of PF red-shifts and broadens with increasing pressures. The phonon lines in PF show an antiresonance effect at higher pressures indicating a strong electron-phonon interaction.
Physics, Astronomy, and Materials Science
Guha, S., J. D. Rice, C. M. Martin, W. Graupner, M. Chandrasekhar, H. R. Chandrasekhar, and U. Scherf. "Optical Spectroscopic Studies of a Soluble Fluorene-Based Conjugated Polymer: A Hydrostatic Pressure and Temperature Study." MRS Online Proceedings Library (OPL) 708 (2001).
MRS Online Proceedings Library