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<p>Calixarenes and their derivatives are widely used in water depollution. Furthermore, functionalized clay is an effective adsorbent of heavy metals. In this context, the present work focuses on the synthesis and characterization of three newly developed nanocomposites (Chb(APTES)-Calix2, Chb(APTES)-Calix3 and Chb(APTES)-Calix4). First, the smectite clay is functionalized with APTES silane. Then, calix [<CitationRef CitationID="CR4">4</CitationRef>]arenes derivatives (di, tri and tetra-ester) are grafted through amidation reaction. The structure and properties of the silylated clay and the resulting nanocomposites are investigated using X-ray diffraction, FTIR spectroscopy, thermal analysis and solid-state <sup>29</sup>Si CP/MASNMR spectroscopy. The results show that APTES silane is successfully grafted and adopts a bilayer arrangement within the clay interlayer. The calix [<CitationRef CitationID="CR4">4</CitationRef>]arene di, tri and tetra-ester are intercaled and grafted through a single ester function. SEM analysis reveals that the that the grafting of calix [<CitationRef CitationID="CR4">4</CitationRef>]arene derivatives occurs in a random process. These nanocomposites show potential for application in wastewater decontamination.</p>

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Preparation and Characterization of Newly Nanocomposites Calix[4]Arenes Derivatives-Functionalized Smectite

  • 期刊论文

  • 发表日期：

    2025年6月27日

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  • Hamed Abbassi,
  • Rym Abidi,
  • Memia Benna

摘要

Calixarenes and their derivatives are widely used in water depollution. Furthermore, functionalized clay is an effective adsorbent of heavy metals. In this context, the present work focuses on the synthesis and characterization of three newly developed nanocomposites (Chb(APTES)-Calix2, Chb(APTES)-Calix3 and Chb(APTES)-Calix4). First, the smectite clay is functionalized with APTES silane. Then, calix [4]arenes derivatives (di, tri and tetra-ester) are grafted through amidation reaction. The structure and properties of the silylated clay and the resulting nanocomposites are investigated using X-ray diffraction, FTIR spectroscopy, thermal analysis and solid-state 29Si CP/MASNMR spectroscopy. The results show that APTES silane is successfully grafted and adopts a bilayer arrangement within the clay interlayer. The calix [4]arene di, tri and tetra-ester are intercaled and grafted through a single ester function. SEM analysis reveals that the that the grafting of calix [4]arene derivatives occurs in a random process. These nanocomposites show potential for application in wastewater decontamination.