Preparation and characterization of 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin grafted on organosilane-pillared montmorillonite by covalent bonding
Source abstract
Abstract
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 A 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.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Porphyrin and Phthalocyanine Chemistry · Carbon Nanotubes in Composites · Electrochemical sensors and biosensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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