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Updated: May 23, 2026
10:39
Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
Gas-phase fragmentation of host-guest complexes between β-cyclodextrin and small molecules
Xiaoxiao Ma1, Zhenwei Wei, Xingchuang Xiong
1Department of Chemistry, Tsinghua University, Beijing 100084, China.
Talanta
|April 10, 2012
Summary
Investigating host-guest interactions using collision-induced dissociation (CID) reveals how guest molecules affect beta-cyclodextrin (β-CD) fragmentation. Proton affinity differences explain variations in noncovalent complex stability.
Area of Science:
- Supramolecular chemistry
- Chemical physics
- Analytical chemistry
Background:
- Noncovalent interactions are fundamental to molecular recognition and self-assembly.
- Host-guest complexes, particularly with beta-cyclodextrin (β-CD), are vital in applications like drug delivery.
- Understanding guest molecule interactions within β-CD hosts requires further investigation.
Purpose of the Study:
- To investigate gas-phase fragmentation of β-CD host-guest complexes using collision-induced dissociation (CID).
- To analyze how guest molecule properties influence the fragmentation patterns and stability of β-CD complexes.
- To qualitatively evaluate noncovalent interactions in host-guest systems.
Main Methods:
- Formation of host-guest complexes between β-cyclodextrin (β-CD) and small guest molecules.
- Application of collision-induced dissociation (CID) mass spectrometry to study gas-phase fragmentation.
- Analysis of CID mass spectra and fragmentation curves to determine CE(50) values.
Main Results:
- CID mass spectra of β-CD complexes showed significant changes with increasing collision energy.
- Fragmentation patterns varied depending on the specific small guest molecule.
- Differences in fragment ion formation were correlated with the proton affinity of the guest molecules.
- CE(50) values provided a metric for qualitatively assessing interaction strengths.
Conclusions:
- Guest molecule proton affinity is a key factor influencing the fragmentation behavior of β-CD host-guest complexes.
- CID is a valuable technique for probing noncovalent interactions in gas-phase supramolecular systems.
- The study provides insights into the stability and interaction dynamics within β-CD-based host-guest complexes.
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