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Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
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Layered microporous tin(IV) bisphosphonates.

María del Mar Gómez-Alcántara1, Aurelio Cabeza, Pascual Olivera-Pastor

  • 1Departamento de Química Inorgánica, Universidad de Málaga, Campus Teatinos, 29071 Málaga, Spain.

Dalton Transactions (Cambridge, England : 2003)
|September 12, 2007
PubMed
Summary

This study synthesized new porous tin(IV) phosphonate materials with tunable pore sizes. Increasing alcohol chain length shifted pore size distributions, offering controlled porosity for advanced applications.

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Area of Science:

  • Materials Science
  • Inorganic Chemistry
  • Nanotechnology

Background:

  • Porous materials are crucial for various applications, including catalysis and separation.
  • Tin(IV) phosphonates offer unique structural and chemical properties for material design.

Purpose of the Study:

  • To synthesize and characterize novel porous tin(IV) phosphonophenoxyphenylphosphonates.
  • To investigate the influence of synthesis parameters on pore size distribution and microstructure.
  • To explore the potential applications of these materials based on their properties.

Main Methods:

  • Hydrothermal synthesis using 4-(4'-phosphonophenoxy)phenyl phosphonic acid precursor.
  • Characterization using X-ray powder diffraction, MAS-NMR spectroscopy (31P, 119Sn), and electron microscopy (SEM, TEM).
  • Textural property analysis via N2 and CO2 sorption isotherms.

Main Results:

  • Supermicroporous solids with BET surface areas of 300-400 m2 g(-1) were obtained.
  • Distinct microstructures were observed for single-ligand (spheres, 1-2 µm) and cross-linked (microparticles >20 µm) tin(IV) bisphosphonates.
  • Pore size distribution maxima shifted from 12 to 16 Å with increasing alcohol chain length.

Conclusions:

  • Controlled pore size distributions in tin(IV) phosphonates can be achieved by adjusting synthesis conditions.
  • The phosphonate groups play a dual role in the hybrid organic-inorganic layers of tin(IV) bisphosphonates.
  • These materials exhibit tunable microporosity suitable for advanced applications.