Montmorillonite (MMT)-based composites are usually prepared by the absorption method, which results in the unstable MMT composites, because adsorbates are easy to drop down from MMT. In this work, 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin (H2TCPP) molecules were grafted on interfaces of (3-aminopropyl)triethoxysilane (APTES)-pillared MMT by dehydration condensation reaction. X-ray diffraction (XRD) revealed that the interlayer space of the MMT was enlarged from 16.24 to 22.21 Å by introduction of APTES. Fourier-transform infrared (FT-IR) data verified the covalent bonding between APTES-pillared MMT and H2TCPP molecules. UV-Vis absorption spectra displayed that the Soret band of H2TCPP molecules in H2TCPP/APTES/MMT composites had a red-shift with 17 nm compared with that of the monomers, revealing that H2TCPP molecules assembled into J-aggregates. Moreover, H2TCPP/APTES/MMT composites were characterized by thermogravimetric analysis (TGA) and fluorescent spectrophotometer. The APTES-pillared MMT modified with porphyrin has a potential application in biomedicine and environment. Graphical abstract 5,10,15,20-Tetrakis(4-carboxyphenyl)porphyrin (H2TCPP) molecules were grafted on interfaces of (3-aminopropyl)triethoxysilane (APTES)-pillared MMT by dehydration condensation reaction. 5,10,15,20-Tetrakis(4-carboxyphenyl)porphyrin (H2TCPP) molecules were grafted on interfaces of (3-aminopropyl)triethoxysilane (APTES)-pillared MMT by dehydration condensation reaction.

中文翻译：

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共价键接枝在有机硅烷接枝蒙脱土上的5,10,15,20-四（4-羧基苯基）卟啉的制备与表征

蒙脱土（MMT）基复合材料通常通过吸收法制备，这会导致MMT复合材料不稳定，因为被吸附物很容易从MMT上掉下来。在这项工作中，通过脱水缩合反应将5,10,15,20-四（4-羧基苯基）卟啉（H2TCPP）分子接枝在（3-氨丙基）三乙氧基硅烷（APTES）接枝的MMT的界面上。X射线衍射（XRD）显示，通过引入APTES，MMT的层间空间从16.24扩大到22.21Å。傅立叶变换红外（FT-IR）数据验证了APTES桩MMT与H2TCPP分子之间的共价键合。UV-Vis吸收光谱显示，与单体相比，H2TCPP / APTES / MMT复合材料中H2TCPP分子的Soret带具有17 nm的红移，揭示了H2TCPP分子组装成J聚集体。此外，通过热重分析（TGA）和荧光分光光度计对H2TCPP / APTES / MMT复合材料进行了表征。卟啉修饰的APTES柱状MMT在生物医学和环境中具有潜在的应用。通过脱水缩合反应，将图形化的5,10,15,20-四（4-羧基苯基）卟啉（H2TCPP）分子接枝在（3-氨基丙基）三乙氧基硅烷（APTES）接枝的MMT的界面上。通过脱水缩合反应，将5,10,15,20-四（4-羧基苯基）卟啉（H2TCPP）分子接枝在（3-氨基丙基）三乙氧基硅烷（APTES）接枝的MMT的界面上。卟啉修饰的APTES柱状MMT在生物医学和环境中具有潜在的应用。通过脱水缩合反应，将图形化的5,10,15,20-四（4-羧基苯基）卟啉（H2TCPP）分子接枝在（3-氨基丙基）三乙氧基硅烷（APTES）接枝的MMT的界面上。通过脱水缩合反应，将5,10,15,20-四（4-羧基苯基）卟啉（H2TCPP）分子接枝在（3-氨基丙基）三乙氧基硅烷（APTES）接枝的MMT的界面上。卟啉修饰的APTES柱状MMT在生物医学和环境中具有潜在的应用。通过脱水缩合反应，将图形化的5,10,15,20-四（4-羧基苯基）卟啉（H2TCPP）分子接枝在（3-氨基丙基）三乙氧基硅烷（APTES）接枝的MMT的界面上。通过脱水缩合反应，将5,10,15,20-四（4-羧基苯基）卟啉（H2TCPP）分子接枝在（3-氨基丙基）三乙氧基硅烷（APTES）接枝的MMT的界面上。