N-Bridged Acyclic Trimeric Poly-Cyclodiphosphazanes: Highly Tuneable Cyclodiphosphazane Building Blocks

Area of Science:

• Inorganic Chemistry
• Supramolecular Chemistry
• Materials Science

Background:

• Cyclodiphosphazanes are cyclic compounds with diverse applications.
• Acyclic analogues offer unique structural and electronic properties.
• Tuning molecular architecture is key for advanced material design.

Purpose of the Study:

• To synthesize and characterize a novel family of acyclic trimeric cyclodiphosphazanes.
• To investigate the influence of bridging groups on molecular topology and properties.
• To evaluate the potential of these compounds in host-guest chemistry.

Main Methods:

• Chemical synthesis of novel acyclic cyclodiphosphazane compounds.
• Structural characterization using spectroscopic techniques.
• Computational calculation of chloride binding affinities.

Main Results:

• Successful synthesis of new acyclic trimeric cyclodiphosphazanes with NH, NiPr, NtBu, and NPh bridging groups.
• Demonstration of tunable distances between terminal moieties (6-10 Å) controlled by steric bulk.
• Observation of significant topological changes induced by NH···π aryl interactions.
• Calculation of NH-bridged chloride binding affinities, showing promise for host-guest applications.

Conclusions:

• A new family of acyclic cyclodiphosphazanes with tunable properties has been synthesized.
• These compounds exhibit responsive topological changes and modulated intermolecular interactions.
• The developed cyclodiphosphazanes are promising candidates for supramolecular host-guest applications due to their hydrogen bonding capabilities.