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Porous networks based on iron(ii) clathrochelate complexes
José L Bila1, Joffrey Pijeat, Andrea Ramorini
1Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland. kay.severin@epfl.ch.
Dalton Transactions (Cambridge, England : 2003)
|March 19, 2019
Summary
New microporous networks from iron(ii) clathrochelate complexes exhibit high surface areas. These porous materials show selective absorption capabilities, demonstrated by preferential uptake of d-tryptophan over l-tryptophan.
Area of Science:
- Materials Science
- Supramolecular Chemistry
- Coordination Chemistry
Background:
- Boronate ester-capped iron(ii) clathrochelate complexes offer unique structural properties.
- Covalent organic frameworks (COFs) and metal-organic frameworks (MOFs) are important porous materials.
- Developing novel porous networks with tailored functionalities is an active research area.
Purpose of the Study:
- To synthesize and characterize novel microporous networks using iron(ii) clathrochelate complexes.
- To investigate the porosity and surface area of the resulting networks.
- To explore the potential of chiral networks for enantioselective separation.
Main Methods:
- Suzuki-Miyaura polycross-coupling reactions of tetrabrominated clathrochelate complexes with diboronic acids.
- Sonogashira-Hagihara polycross-coupling of clathrochelate complexes with terminal alkyne functions and 1,3,5-tribromobenzene.
- Brunauer-Emmett-Teller (BET) surface area analysis to quantify porosity.
Main Results:
- Microporous networks with permanent porosity were successfully synthesized.
- Apparent Brunauer-Emmett-Teller (BET) surface areas up to 593 m2 g-1 were achieved.
- Chiral networks were prepared using enantiopure clathrochelate complexes.
- A chiral network demonstrated preferential absorption of d-tryptophan over l-tryptophan.
Conclusions:
- Boronate ester-capped iron(ii) clathrochelate complexes can form robust microporous networks.
- These networks possess significant surface areas and permanent porosity.
- The developed chiral networks show promise for enantioselective guest molecule recognition and separation.
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