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Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
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A Pillararene-Based Cavitand: Synthesis and Solid-State Capsular Assemblies Induced by Linear Alkanes with Specific
Mingrui Xiao1,2, Zhenzhuo Liu3, Peiren Liu1
1Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China.
Organic Letters
|July 17, 2024
Summary
A new chiral cavitand molecule was created using SuFEx chemistry. This molecule forms host-guest capsules with specific linear alkanes, driven by hydrogen bonding and noncovalent interactions.
Area of Science:
- Supramolecular Chemistry
- Organic Synthesis
- Crystal Engineering
Background:
- Pillararene-based cavitands are macrocyclic hosts with tunable cavities.
- Planar chirality in host molecules offers unique recognition properties.
- Supramolecular Self-Assembly is crucial for constructing complex molecular architectures.
Purpose of the Study:
- To synthesize a novel pillararene-based cavitand featuring fixed planar chirality.
- To investigate the host-guest complexation behavior of this cavitand with linear alkanes.
- To elucidate the driving forces behind the formation of host-guest capsules.
Main Methods:
- Synthesis of the pillararene-based cavitand utilizing the Sulfur(VI) Fluoride Exchange (SuFEx) reaction.
- Single crystal X-ray diffraction analysis to determine the solid-state structure of host-guest complexes.
- Spectroscopic and analytical techniques to characterize the synthesized cavitand.
Main Results:
- Successful synthesis of a pillararene-based cavitand with fixed planar chirality.
- Observation of well-defined host-guest capsules formed between the cavitand and linear alkanes of specific lengths in the solid state.
- Identification of hydrogen bonding and noncovalent interactions as key drivers for capsule formation.
Conclusions:
- The novel chiral cavitand effectively forms host-guest capsules with linear alkanes.
- The SuFEx reaction provides a viable route for constructing complex chiral macrocycles.
- Understanding these self-assembly processes is vital for designing advanced materials and recognition systems.
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