Periodic mesoporous organosilicas containing pyromellitic diimide units embedded in the pore walls (PMOPMI) were synthesized by co-condensation of the bridged silsesquioxane precursor N,N′-bis(3-triethoxysilylpropyl)pyromellitimide with tetraethoxysilane (TEOS) in acidic conditions, in the presence of the structure-directing agent Pluronics P-123. PMOPMI were also synthesized from the corresponding amic acid precursors. The PMOPMI were studied by different techniques, including N₂ adsorption isotherms, transmission electron microscopy, infrared and diffuse reflectance spectroscopy and contact angles. The studied samples displayed well-organized 2D-hexagonal structures. The PMOPMI were able to adsorb petroleum asphaltenes from toluene solutions, and were efficient photosensitizers for the photodegradation of the adsorbed asphaltenes when irradiated. Most of the asphaltenes were removed from solutions by the combined action of adsorption and photodegradation processes.

在酸性条件下，在酸性条件下，通过桥联倍半硅氧烷前体N，N'-双（3-三乙氧基甲硅烷基丙基）均苯三甲酰亚胺与四乙氧基硅烷（TEOS）的共缩合反应，合成了嵌入孔壁中的均苯四甲二酰亚胺单元的周期性介孔有机硅（PMOPMI）。结构导向剂Pluronics P-123的制备。PMOPMI也由相应的酰胺酸前体合成。通过不同的技术研究了PMOPMI，包括N ₂吸附等温线，透射电子显微镜，红外和漫反射光谱以及接触角。研究的样品显示出组织良好的2D六边形结构。PMOPMI能够从甲苯溶液中吸附石油沥青质，并且是有效的光敏剂，用于在辐照时对吸附的沥青质进行光降解。通过吸附和光降解过程的联合作用，从溶液中除去了大多数沥青质。