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Updated: Jun 22, 2026

Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO2/Si/SiO2 Wafers for Green Desalination
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Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO2/Si/SiO2 Wafers for Green Desalination

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Cavitands with mobile walls.

Shengxiong Xiao1, Dariush Ajami, Julius Rebek

  • 1Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.

Organic Letters
|July 4, 2009
PubMed
Summary
This summary is machine-generated.

Researchers developed deep cavitands with varying wall structures. One design improved NMR spectra analysis, while another offered stronger guest binding and slower guest exchange, advancing host-guest chemistry.

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Area of Science:

  • Supramolecular Chemistry
  • Host-Guest Chemistry

Background:

  • Cavitands are macrocyclic hosts capable of molecular recognition.
  • Tuning cavitand structure influences guest binding properties.

Purpose of the Study:

  • To synthesize and characterize deep cavitands with distinct spacer units.
  • To investigate the impact of spacer length on guest binding and NMR spectral properties.

Main Methods:

  • Synthesis of deep cavitands with quinoxaline and benzene spacers.
  • Nuclear Magnetic Resonance (NMR) spectroscopy for guest interaction studies.

Main Results:

  • Quinoxaline-based longer walls enhanced guest NMR spectra.
  • Benzene-based shorter walls demonstrated tighter guest binding.
  • Benzene-based walls exhibited slower guest exchange kinetics.

Conclusions:

  • Spacer selection critically influences cavitand performance.
  • Tailored cavitand structures can optimize NMR analysis or binding affinity.