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Theoretical study on spectral and optical properties of essential amino acids: a comparative study

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Abstract

In the present work, a theoretical study has been performed targeting essential amino acids (EAA) Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine, and predicted their different physical and chemical properties by using computational techniques. Amino acids (AA), a fundamental structural unit of protein are amino and carboxyl-rich compounds having electrophilic and nucleophilic regions in them. The reactivity of AA was determined by computing molecular electrostatic potential (MEP) surfaces, counterplots, dipole moment, band gap, global reactivity parameters, and polarizability parameters. Spectral analysis (UV–Vis, Raman) helps in studying their electronic and vibrational properties. The polarizability and first-order hyperpolarizability parameters were also computed to detect the nonlinear optical (NLO) behavior of AA. The comparison done with reference NLO materials Urea, Phenyl urea, and 3-nitroaniline showed that Phenylalanine has higher hyperpolarizability and can better be used as a potent NLO material.

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Structure: https://pubchem.ncbi.nlm.nih.gov/, Extension conversion: http://openbabel.org/wiki/Main_Page, Optimization: https://gaussian.com/, Data analysis: https://gaussian.com/gaussview6/, Graph plotting: https://www.originlab.com/

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SL: Data curation, Writing-Original draft preparation, Visualization, Investigation, Software, Validation. MR: Conceptualization, Methodology, Writing-Reviewing and Editing, Supervision. KD: Conceptualization, Writing- Reviewing and Editing.

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Correspondence to Meenakshi Rana.

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Lakhera, S., Rana, M. & Devlal, K. Theoretical study on spectral and optical properties of essential amino acids: a comparative study. Opt Quant Electron 54, 714 (2022). https://doi.org/10.1007/s11082-022-04118-4

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  • DOI: https://doi.org/10.1007/s11082-022-04118-4

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