Template effect where 1-3 molecules drive formation of a trimer carceplex

Area of Science:

• Supramolecular Chemistry
• Host-Guest Chemistry

Background:

• Carceplexes are fascinating molecular cages with potential applications in catalysis and molecular recognition.
• Understanding the templating effect is crucial for designing and synthesizing complex supramolecular structures.

Purpose of the Study:

• To investigate the template effect in the formation of trimer carceplexes using 1-3 molecules as templates.
• To analyze the influence of template molecularity and binding on carceplex formation.
• To explore the dynamics and recognition mechanisms within host-guest systems.

Main Methods:

• Studied thirteen different templates to measure template ratios for like and unlike molecularity.
• Investigated five transition-state models for binding abilities.
• Analyzed chemical shifts, thermodynamic, and kinetic values for templation.
• Performed molecular dynamics and conformational dynamics studies of hosts and guests.

Main Results:

• Template ratios were measured, indicating the influence of template type and number.
• Binding affinity was identified as a key factor, often exhibiting tight interactions.
• The formation of the final covalent bond was found to be the guest-determining step.
• Molecular and conformational dynamics provided insights into host-guest recognition.

Conclusions:

• The template effect significantly influences trimer carceplex formation, with tight binding being paramount.
• Host-guest recognition is governed by molecular dynamics and conformational adaptability.
• The reversible binding of water to trimer carceplexes presents new possibilities for inner-phase reactions.