β-Keto-enol Tethered Pyridine and Thiophene: Synthesis, Crystal Structure Determination and its Organic Immobilization on Silica for Efficient Solid-Liquid Extraction of Heavy Metals. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Molecules Année : 2016

β-Keto-enol Tethered Pyridine and Thiophene: Synthesis, Crystal Structure Determination and its Organic Immobilization on Silica for Efficient Solid-Liquid Extraction of Heavy Metals.

Résumé

Molecules bearing β-keto-enol functionality are potential candidates for coordination chemistry. Reported herein is the first synthesis and use of a novel designed ligand based on β-keto-enol group embedded with pyridine and thiophene moieties. The product was prepared in a one-step procedure by mixed Claisen condensation and was characterized by EA, m/z, FT-IR, (1H, 13C) NMR and single-crystal X-ray diffraction analysis. The new structure was grafted onto silica particles to afford a chelating matrix which was well-characterized by EA, FT-IR, solid-state 13C-NMR, BET, BJH, SEM and TGA. The newly prepared organic-inorganic material was used as an adsorbent for efficient solid-phase extraction (SPE) of Cu(II), Zn(II), Cd(II) and Pb(II) from aqueous solutions and showed a capture capacity of 104.12 mg·g−1, 98.90 mg·g−1, 72.02 mg·g−1, and 65.54 mg·g−1, respectively. The adsorption capacity was investigated, in a batch method, using time of contact, pH, initial concentration, kinetics (Langmuir and Freundlich models), and thermodynamic parameters (ΔG°, ΔH° and ΔS°) of the system effects.
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Dates et versions

hal-01343323 , version 1 (01-07-2020)

Identifiants

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Smaail Radi, Said Tighadouin, Maryse Bacquet, Stephanie Degoutin, Jean-Philippe Dacquin, et al.. β-Keto-enol Tethered Pyridine and Thiophene: Synthesis, Crystal Structure Determination and its Organic Immobilization on Silica for Efficient Solid-Liquid Extraction of Heavy Metals.. Molecules, 2016, 21 (7), pp.888-900. ⟨10.3390/molecules21070888⟩. ⟨hal-01343323⟩
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