Novel Method for Extracting the Spectrum of a Supramolecular Complex via a Comprehensive Approach Involving...

Area of Science:

• Spectroscopy
• Supramolecular Chemistry
• Computational Chemistry

Background:

• Supramolecular complexes form via weak intermolecular interactions in solution.
• Spectra of these complexes are often obscured by uncomplexed solutes.
• Analyzing these complex spectra is crucial for understanding molecular interactions.

Purpose of the Study:

• To develop a novel spectral analysis approach for retrieving the spectrum of supramolecular complexes.
• To accurately determine the binding models and equilibrium constants of such complexes.
• To provide new insights into intermolecular interactions using spectroscopic data.

Main Methods:

• Construction of a two-dimensional (2D) asynchronous spectrum.
• Application of a genetic algorithm to obtain a heuristic spectrum of the supramolecular complex.
• Evaluation of binding models and determination of equilibrium constants.

Main Results:

• A novel spectral analysis approach was successfully developed and applied.
• The method accurately retrieved the spectrum of a benzene/iodine supramolecular complex.
• A benzene molecule interacting with two iodine molecules via halogen bonding was identified as the sole binding model.

Conclusions:

• The novel spectral analysis approach enables the isolation and characterization of supramolecular complex spectra.
• This method provides a powerful tool for studying various intermolecular interactions via spectroscopy.
• The study successfully determined the characteristic FTIR band and equilibrium constant for the benzene/I2 complex.