Home List of Titles Nature of interactions of tryptophan with zinc oxide nanoparticles and l-aspartic acid: a spectroscopic approach
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/196749
- Nature of interactions of tryptophan with zinc oxide nanoparticles and l-aspartic acid: a spectroscopic approach
- Mandal, Gopa; Bhattacharya, Sudeshna; Ganguly, Tapan
- The interaction between an essential amino acid l-tryptophan (TRP) with semiconductor zinc oxide (ZnO) nanoparticles and amino acid l-aspartic acid (ASP) is investigated by steady state and time resolved spectroscopic techniques. In both the cases static mode of fluorescence quenching occurs indicating the formation of ground-state complex. Binding constants and the number of binding sites were determined for both the complexes. The observed thermodynamic parameters suggest that the key interacting forces involved are van der Waals interaction and hydrogen bonding in case of TRP and ZnO nanoparticles whereas hydrophobic interaction is responsible in formations of TRP-ASP complex.
- Publication type
- Journal article
- Chemical Physics Letters, Vol. 472, no. 1-3 (Aug 2009), pp. 128-133
- Publication year
- FOR Code(s)
- 1007 Nanotechnology; 0306 Physical Chemistry (Incl. Structural)
- Amination; Amines; Amino acids; Binding constants; Binding energy; Binding sites; Essential amino acids; Fluorescence quenching; Ground-state; Hydrogen; Hydrogen bondings; Hydrogen bonds; Hydrophobic interactions; Hydrophobicity; L tryptophans; L-aspartic acids; Nanoparticles; Organic acids; Quenching; Semiconducting zinc compounds; Steady state; Thermodynamic parameters; Time-resolved spectroscopic techniques; Van der Waals forces; Van der waals interactions; Zinc; Zinc oxide; Zinc oxide nanoparticles; Zno; ZnO nanoparticles
- Publisher URL
- Copyright © 2009 Elsevier B.V. All rights reserved.
- Peer reviewed