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Updated: May 11, 2026

Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry
Published on: April 8, 2020
Computational study on the geometry optimization and excited - state properties of riboflavin by ArgusLab 4.0.1
Ambreen Hafeez1, Afshan Naz, Sadaf Naeem
1Department of Biochemistry, Biophysics Research Unit, University of Karachi, Pakistan. ambreenfv@hotmail.com
Abstract:
Riboflavin (vitamin B2) belongs to a group of respiratory enzymes that occur widely in animals and plants participating in vital oxidation- reduction processes in the body. A computational study was conducted on riboflavin by ArgusLab 4.0.1 to obtain the most active conformation of riboflavin and to analyze its excited-state properties. The best conformation of riboflavin was found to be -199.2173 kcal/mol which is the minimum potential energy calculated by geometry convergence function by ArgusLab software; performed according to Hartree-Fock calculation method. Electronic transition states (ground and excited), were also calculated and visualized by semi-empirical ZINDO method by ArgusLab from which molecular properties such as energies, wave function and dipole moments were established. All the results obtained from geometry optimization and excited-state properties lead us to delineate the active sites with charged groups of riboflavin to interact with the receptors. Such types of investigations are significant for drug-receptor interactions.
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