Synthesis and Application of Aminophenolic Ligands in Preparation of Perovskite-type Inorganic Membranes

Hajibabaei Najafabadi, Hamed | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41313 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Ghanbari, Bahram
  7. Abstract:
  8. Inorganic membranes are a group of compounds which are used in gas separations such as isolating of oxygen from air and/or in petrochemical process like OCM, POM. These days, a variety of research is being conducted to synthesize these membranes from perovskite structures with formulation of ABO3. These compounds have various production procedures and various final perovskite compounds. The purpose of this project is to synthesis and identification of a group of phenolic amino acidic derivatives as new chelating agents, and their use in synthesis of perovskite membranes. For this, novel phenol derivatives of glycine, alanine, β- alanine and leucine amino acids were synthesized and characterized by 1H NMR, 13C NMR, IR spectroscopy ans well as elemental analysis. Furtheremore, their complexation with perovskite’s membrane cations (Co(II), Fe(III), Sr(II), La(III)) were studied by elemental analysis, IR spectroscopy, electronic spectroscopy and potentiometric titrations (in their solutions). Then, the chelating agents were utilized to prepare a perovskite membrane. According to XRD patterns, it can be concluded that the powdered precursor prepared by glycine derivative has shown better qualification in perovskite membrane synthesis rather than one prepared by applying glycine as ligand. Finally, glycine aminophenolic derivative has shown advantage compared to EDTA, in single phase perovskite production, since there no need to buffer the reaction mixture
  9. Keywords:
  10. Perovskite ; Amino Acid ; Phenol ; Inorganic Membrane

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