Atomic Decomposition Scheme of Noncovalent Interactions Applied to Host-Guest Assemblies

Area of Science:

• Supramolecular Chemistry
• Computational Chemistry
• Chemical Physics

Background:

• Host-guest chemistry relies on understanding noncovalent interactions.
• Existing computational tools offer limited quantitative insights into these interactions.
• Accurate quantification is crucial for designing novel stimuli-responsive systems.

Purpose of the Study:

• To develop a novel computational tool for quantifying atomic contributions to host-guest interactions.
• To provide a more accurate, per-atom analysis of noncovalent interactions.
• To aid in the rational design of selective supramolecular agents.

Main Methods:

• Utilized the local atomic descriptor IGM-δginter/At.
• Decomposed fragment interactions into atomic contributions.
• Quantified atomic roles using an integrated Δginter/At score.

Main Results:

• Applied the IGM-Δginter/At approach to complex systems like multimetallic arrays, buckycatchers, and organic assemblies.
• Successfully elucidated the specific atomic contributions to guest encapsulation in challenging systems.
• Demonstrated the tool's ability to provide per-atom insights into guest accommodation.

Conclusions:

• The IGM-Δginter/At score is a valuable tool for detailed analysis of host-guest interactions.
• This method enhances understanding of noncovalent interactions at the atomic level.
• The approach can guide the rational design of more selective supramolecular systems for experimental teams.