Effect of Solvation on Glycine Molecules: A Theoretical Study

Area of Science:

• Computational Chemistry
• Quantum Chemistry
• Molecular Modeling

Background:

• Glycine is a fundamental amino acid with diverse chemical forms.
• Understanding glycine's properties is crucial in biochemistry and materials science.
• Accurate computational models are needed to study molecular behavior.

Purpose of the Study:

• To calculate molecular geometries and properties of neutral and charged glycine.
• To investigate glycine in both amino acid and zwitterionic forms.
• To determine thermodynamic quantities using advanced computational techniques.

Main Methods:

• Employed ab initio calculations at HF+MP2 and DFT-B3LYP levels.
• Utilized molecular descriptors, including Mulliken electronegativity and chemical hardness.
• Performed complete vibrational analysis at the global energy minimum.

Main Results:

• Determined precise molecular geometries for various glycine forms.
• Calculated molecular chemical potential, electronegativity, and hardness.
• Evaluated standard Gibbs energy and other thermodynamic quantities accurately.

Conclusions:

• The study provides a comprehensive computational analysis of glycine.
• Results offer valuable data for understanding glycine's reactivity and stability.
• The employed methods enhance the prediction of molecular thermodynamic properties.