The opposite effects of sodium and potassium cations on water dynamics

doi:10.1039/c6sc03320b

CORC > 北京大学 > 化学与分子工程学院

	The opposite effects of sodium and potassium cations on water dynamics
	Zhang, Qiang ; Chen, Hailong ; Wu, Tianmin ; Jin, Tan ; Pan, Zhijun ; Zheng, Junrong ; Gao, Yiqin ; Zhuang, Wei
刊名	CHEMICAL SCIENCE
	2017
关键词	NUCLEAR MAGNETIC-RELAXATION HYDROGEN-BOND EXCHANGE AQUEOUS-SOLUTIONS ELECTROLYTE-SOLUTIONS LIQUID WATER IRREVERSIBLE-PROCESSES HYDRATION DYNAMICS JUMP MECHANISM IONS MOLECULES
DOI	10.1039/c6sc03320b
英文摘要	Water rotational dynamics in NaSCN and KSCN solutions at a series of concentrations are investigated using femtosecond infrared spectroscopy and theory. Femtosecond infrared measurements, consistent with previous NMR observations, detect that sodium slows down while potassium accelerates the water O-H bond rotation. Results of reported neutron scattering measurements, on the other hand, suggested that these two cations have similar structure-breaking effects on water, and therefore should both accelerate water rotation through the presumably dominating large-amplitude angular jump component. To explain this discrepancy, theoretical studies with both classical and ab initio models were carried out, which indicate that both ions indeed accelerate the large-amplitude angular jump rotation of the water molecules, while the observed cation specific effect originates from the non-negligible opposite impact of the sodium and potassium cations on the diffusive rotation of water molecules.; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB20000000, XDB10040304]; NSFC [21373201, 21033008, 21125311, 91027044]; Scientific Research Foundation for Returned Scholars, Ministry of Education of China and Liaoning BaiQianWan Talents Program [2015-73]; Welch foundation [C-1752]; AFOSR Award [FA9550-11-1-0070]; Sloan Foundation; David and Lucile Packard Foundation; SCI(E); ARTICLE; 2; 1429-1435; 8
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/476162]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Zhang, Qiang,Chen, Hailong,Wu, Tianmin,et al. The opposite effects of sodium and potassium cations on water dynamics[J]. CHEMICAL SCIENCE,2017.
APA	Zhang, Qiang.,Chen, Hailong.,Wu, Tianmin.,Jin, Tan.,Pan, Zhijun.,...&Zhuang, Wei.(2017).The opposite effects of sodium and potassium cations on water dynamics.CHEMICAL SCIENCE.
MLA	Zhang, Qiang,et al."The opposite effects of sodium and potassium cations on water dynamics".CHEMICAL SCIENCE (2017).