[中文]5-(4-羧基苯基)-10, 15, 20-三苯基卟啉(TPP)是具有高度对称性和大 π 共轭结构的分子，属于卟啉衍生物。卟啉是血红素、叶绿素等多种生物成分的关键前体，结构上的特殊性使其呈现出特征的光学特性。该文通过检测不同溶液条件下 TPP 的电子吸收和分子发射光谱的变化，探讨溶液极性、pH 等对其光学性能的影响，测量分子的质子化能力，并与理论计算值互相推演，探究可能出现这些现象的分子结构变化。最后，根据体外溶液和肿瘤细胞中光动力效果预测其在肿瘤的光动力治疗方面的潜能。[/中文]

[外文]5-(4-Carboxyphenyl)-10,15,20-triphenylporphyrin (TPP) is a porphyrin derivation with high symmetry and conjugated π bond. Porphyrins are critical precursor of many bio-compounds, such as heme and chloroplast. And its unique structure contributes to a special spectroscopy. In this article, the effect of polarity and pH of solution on the optical property of TPP was analyzed by detecting the absorption and emission spectra in different solvent. Then, we discussed how the molecular structure changed before and after protonation by theoretically circulating several basic parameter of different conformations. Finally, we predicted its prospects for photodynamic therapy according to the photodynamic reaction efficiency shown in vitro. [/外文]