Hydration Dynamics of Cyanoferrate Anions Examined by Ultrafast Infrared Spectroscopy

	Hydration Dynamics of Cyanoferrate Anions Examined by Ultrafast Infrared Spectroscopy
	Yu, Pengyun 1,2; Yang, Fan 1; Zhao, Juan 1; Wang, Jianping 1
刊名	journal of physical chemistry b
	2014-03-20
卷号	118 期号:11 页码:3104-3114
英文摘要	in this work, we carried out steady-state ir absorption, transient ir pump-probe, and waiting-time-dependent two-dimensional (2d) ir measurements on ferrocyanide and ferricyanide ions solvated in water and deuterated water. these two anions are highly symmetric and have distributed cyano groups with ir-active stretching modes in the 5 mu m wavelength region. the line width of their linear ir spectra and the initial value of the vibrational frequency-frequency correlation function extracted from their 2d ir spectra indicate water molecules in the hydration shell of the ferro-species are more inhomogeneously distributed but more tightly bound to the cyano groups than those of the fern-species. different charges and their distributions in the two anions cause different hydrogen bonding strengths with solvent. the frequency correlation relaxes somewhat slower in ferrocyanide, agreeing with stronger solute-solvent hydrogen-bonding interaction in this case. mechanisms of the solvent isotope effect on the vibrational relaxation dynamics of the cyano stretching mode are discussed. these results also suggest that in the hydration shell the ferro-species breaks more water structure than the fern-species, which is opposite to the situation of the bulk water region (beyond the hydration shell) reported previously. this work demonstrated that combined ir methods can be very useful for understanding the molecular. details of the structure and dynamics of the hydrated ions.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, physical
研究领域[WOS]	chemistry
关键词[WOS]	vibrational-energy relaxation ; aqueous solvation shells ; hydrogen-bond structure ; 2d ir spectroscopy ; population relaxation ; liquid water ; dephasing dynamics ; ions ; solvents ; complexes
收录类别	SCI
语种	英语
WOS记录号	WOS:000333381800033
公开日期	2016-05-09
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/145918]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Inst Chem, State Key Lab Mol React Dynam, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yu, Pengyun,Yang, Fan,Zhao, Juan,et al. Hydration Dynamics of Cyanoferrate Anions Examined by Ultrafast Infrared Spectroscopy[J]. journal of physical chemistry b,2014,118(11):3104-3114.
APA	Yu, Pengyun,Yang, Fan,Zhao, Juan,&Wang, Jianping.(2014).Hydration Dynamics of Cyanoferrate Anions Examined by Ultrafast Infrared Spectroscopy.journal of physical chemistry b,118(11),3104-3114.
MLA	Yu, Pengyun,et al."Hydration Dynamics of Cyanoferrate Anions Examined by Ultrafast Infrared Spectroscopy".journal of physical chemistry b 118.11(2014):3104-3114.