Preparation of polysilsesquioxanes with hierarchical structures and their functionalization

在本研究中，我们制备了以手性基团和氯化铵基团为侧链的梯状聚硅氧烷（PSQs），形成了手性构象和六边形堆叠结构。手性有机三乙氧基硅烷和3-氨基丙基三乙氧基硅烷在盐酸和甲醇的混合溶剂中通过溶胶-凝胶共聚实现了这一反应。通过1H NMR， IR, ^29Si NMR，静态光散射（SLS）， x射线衍射（XRD），振动圆二色性（VCD）测量对产物的结构进行了表征。此外，我们利用所得psq研究了阴离子卟啉如四苯基卟啉四磺酸（TPPS）的手性聚集体的形成。TPPS/PSQs水溶液的电子圆二色性（ECD）和紫外-可见光谱表明，TPPS沿着作为PSQs侧链的铵基形成了手性h聚集体。

In this study, we prepared ladder-like polysilsesquioxanes (PSQs) containing chiral and ammonium chloride groups as side-chains, forming chiral conformations and hexagonal stacking structures. This was achieved by sol-gel copolycondensation of chiral organotriethoxysilane and 3-aminopropyltriethoxysilane in a mixed solvent of aqueous hydrochloric acid and methanol. The structures of the resulting products were characterized by 1H NMR, IR, ^29Si NMR, static light scattering (SLS), X-ray diffraction (XRD), vibrational circular dichroism (VCD) measurements. In addition, we investigated the formation of chiral aggregates of anionic porphyrin such as tetraphenylporphine tetrasulfonic acid (TPPS) using the resulting PSQs. The electronic circular dichroism (ECD) and UV-Vis spectra of aqueous mixtures of TPPS/PSQs indicated the formation of chiral H-aggregates of TPPS along the ammonium groups as side-chains of the PSQs.