Mediating relaxation and polarization of hydrogen-bonds in water by NaCl salting and heating

• Main Authors: Zhang, Xi, Yan, Tingting, Huang, Yongli, Ma, Zengsheng, Liu, Xinjuan, Zou, Bo, Sun, Changqing
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2014
• Subjects: DRNTU::Science::Chemistry::Physical chemistry
• Online Access: https://hdl.handle.net/10356/103411; http://hdl.handle.net/10220/24508
• Institution: Nanyang Technological University

Infrared spectroscopy and contact-angle measurements revealed that NaCl salting has the same effect as heating on O:H phonon softening and H–O phonon stiffening, but has the opposite effect on skin polarization of liquid water. The mechanics of thermal modulation of O–O Coulomb repulsion [Sun, et al., J. Phys. Chem. Lett., 2013, 4, 3238] may suggest a possible mechanism for this NaCl involved Hofmeister effect, aqueous solution modulated surface tension and its abilities in protein dissolution, from the perspective of Coulomb mediation of interaction within the O:H–O bond.