[Studies on coordination and hydrogen bond intermolecular interaction using 1D & 2D FTIR spectroscopy].

Area of Science:

• Spectroscopy
• Chemical Analysis
• Physical Chemistry

Context:

• Studying weak intermolecular interactions is crucial in chemistry.
• Conventional 1D spectra often show subtle variations, making analysis difficult.
• Two-dimensional (2D) correlation spectroscopy offers enhanced sensitivity for detecting these interactions.

Purpose:

• To apply 2D correlation spectroscopy with variable concentrations to study intermolecular interactions.
• To validate the necessity of the "Orthogonal Sample Design Scheme" for accurate 2D spectral analysis.
• To investigate interactions in two distinct chemical systems: Sodium 2-Aminobenzoate/NdCl3 and PC88A/NA.

Summary:

• The study utilized 2D synchronous FTIR spectra combined with an "Orthogonal Sample Design Scheme" to analyze weak intermolecular interactions.
• In the Sodium 2-Aminobenzoate/NdCl3 system, coordination was confirmed via cross peaks, indicating Nd3+ interaction with amino and carboxyl groups.
• In the PC88A/NA system, interactions were identified through cross peaks between POH and COOH stretching bands, suggesting new assembly formation.

Impact:

• The research demonstrates the effectiveness of 2D correlation spectroscopy for elucidating subtle intermolecular interactions.
• It provides a validated method using the "Orthogonal Sample Design Scheme" for improved spectral analysis.
• The findings offer insights into the specific interaction mechanisms in the studied chemical systems.