Pyrrole Carboxamide Binol Conjugates: Chiral Receptors for Chemical Inversion of L-amino Acids to D- amino Acids| Chapter 4 | Progress in Chemical Science Research Vol. 5

 As chirality conversion reagents (CCRs), four pyrrole carboxamide binol conjugates 1-4 have been used to study the chemical inversion of L-amino acids to D-amino acids. With the help of a resonance-assisted hydrogen bond (RAHB), a Schiff base type imine is formed using this technique, raising the proton's acidity. The heterocylic moiety of the pendant groups and the extra hydrogen bonds between the amino acids and them further stabilise the molecule. All of the pyrrole carboxamine-based receptors 1-4 were discovered to have conversion efficiencies that were comparable to those of the receptors previously reported.

Author(s) Details:

K. Velmurugan,
Fluorensic Materials Laboratory, Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed to be University), Karunya Nagar, Coimbatore-641 114, India.

Lijun Tang,
College of Chemistry and Chemical Engineering, Liaoning Key Laboratory for the Synthesis and Application of Functional Compounds, Bohai University, Jinzhou 121013, P. R. China.

J. Prabhu,
Fluorensic Materials Laboratory, Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed to be University), Karunya Nagar, Coimbatore-641 114, India.

R. Nandhakumar,
Fluorensic Materials Laboratory, Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed to be University), Karunya Nagar, Coimbatore-641 114, India.

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Study on Crystal Growth and Characterization of an Organic Nonlinear Optical Material: An Approach to L-histidinium Maleate (LHM) | Chapter 6 | Research Trends and Challenges in Physical Science Vol. 2

 L-histidinium maleate, a new amino acid organic nonlinear optical material, was successfully produced from aqueous solution using a slow solvent evaporation approach in this study. Single crystal X-ray diffraction analysis was used to determine the structural arrangement of the generated crystal. The chemical composition of the formed crystal was determined using energy dispersive X-ray analysis. 1H-NMR and 13C-NMR spectral investigations were used to determine the molecular structure of the formed crystal. The proportion of optical transmission by the formed crystal was determined using UV–visible spectral analysis. Using the Tauc relation, the band gap of the formed crystal was calculated from the optical absorption spectra. The powder technique of Kurtz and Perry was utilised to determine the nonlinear optical properties of the produced material. HR-SEM examination reveals the surface shape of the formed crystal. The thermal stability of the formed crystal was confirmed using differential thermal analysis.

Author(S) Details

Helen Merina Albert
Department of Physics, Sathyabama Institute of Science & Technology, Chennai-600100, India.

C. Alosious Gonsago
Department of Physics, Mohamed Sathak College of Arts & Science, Chennai-600100, India.

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