Please use this identifier to cite or link to this item: https://apo.ansto.gov.au/dspace/handle/10238/11286
Title: Solubility enhancement of aromatic amino acids and peptides in aqueous solution of divalent transition-metal cations - QENS study
Authors: Yu, DH
Shi, GS
Mole, RA
Fang, HP
Keywords: Transition elements
Solubility
Carboxylic acids
Cations
Copper
Electrons
Issue Date: 12-Jul-2017
Publisher: International Conference on Neutron Scattering
Citation: Yu, D., Shi, G., Mole, R., & Fang, H. (2017). Solubility enhancement of aromatic amino acids and peptides in aqueous solution of divalent transition-metal cations - QENS study. Paper presented at ICNS 2017 (International Conference on Neutron Scattering), Daejeon, South Korea, 9 to 13 July 2017. Retrieved from: http://www.icns2017.org/program.php
Abstract: Generally, the solubility of aromatic amino acids decreases in solution containing multivalent transition-metal ions, such as Cu2+, Pt2+, Pd2+and Co3+, due to the formation of complex precipitates. Surprisingly, we have observed considerably enhanced solubility of tryptophan (Trp) in CuCl2 aqueous solution with a high local concentration of Cu2+ at the surface of Trp [Phys. Rev. Lett. 117, 238102 (2016)]. The solubility increases by 2-5 times that of Trp in pure water. Based on first principle calculations, this unexpected phenomenon is attributed to the strong interaction between Cu2+and the aromatic ring in Trp, referred to as cation–? interaction which modifies the electron distribution of the aromatic ring in Trp and increases the water–aromatic ring interaction.
URI: http://www.icns2017.org/program.php
https://apo.ansto.gov.au/dspace/handle/10238/11286
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