本論文利用拉曼散射光譜來了解藍光有機共軛高分子m-LPPP（methyl substituted ladder type poly（p-phenylene））在壓力0–50 kbar下的分子結構和相變行為。我們發現在壓力增大的情況下，m-LPPP的拉曼光譜的峰值會往高頻率的方向位移，而且隨著壓力變化發現主鍊與側鏈間的拉曼峰值移動速度和強度的變化率均的不同。我們希望藉由這個觀察，配合m-LPPP在高壓下的其他光學特性的測量，兩者互相對應比較後，可以進一步的了解共軛高分子m-LPPP的結構與其光學特性之間的關係。 We present the studies of Raman scattering spectra from blue light-emitted ladder type organic conjugated polymers, methyl substituted ladder type poly(p-phenylene), m-LPPP, under hydrostatic pressure of 0–50 Kbar in order to investigate the structure and to observe the phase change. We find that the Raman spectra shift to higher frequency under hydrostatic pressure. We also find that the shift rate and the change of intensity of the Raman peaks from backbone and side chain vibrations are different. By this work and the studies of the optical properties of the m-LPPP polymers under hydrostatic pressure, we could understand the effect of the molecular structure to its optical properties.
