High-affinity host-guest chemistry of large-ring cyclodextrins

Area of Science:

• Supramolecular Chemistry
• Inorganic Chemistry

Background:

• Host-guest chemistry of large-ring cyclodextrins (LRCDs) remains underexplored due to a lack of suitable guest molecules.
• Significant binding affinities are crucial for enabling practical applications of LRCDs.

Purpose of the Study:

• To investigate the complexation of LRCDs with a novel class of inorganic guest molecules: dodecaborate anions (B12X12(2-)).
• To establish dodecaborate anions as effective guests for LRCDs, potentially enabling new applications.

Main Methods:

• Complexation studies between LRCDs and dodecaborate anions.
• Determination of binding constants using appropriate analytical techniques.

Main Results:

• Dodecaborate anions (B12X12(2-)) were successfully complexed by LRCDs.
• Binding constants in the range of 10(4)-10(6) M(-1) were determined for these complexes.
• Dodecaborate anions are identified as the first tight binders for LRCDs.

Conclusions:

• This study introduces dodecaborate anions as effective guests for LRCDs.
• The significant binding affinities achieved pave the way for exploring new applications of LRCDs in host-guest chemistry.