Molecular Conformations and Dynamics on Surfaces of Gold Nanoparticles Probed with Multiple-Mode Multiple-Dimensional Infrared Spectroscopy

	Molecular Conformations and Dynamics on Surfaces of Gold Nanoparticles Probed with Multiple-Mode Multiple-Dimensional Infrared Spectroscopy
	Bian, Hongtao 1; Li, Jiebo 1; Chen, Hailong 1; Yuan, Kaijun 1; Wen, Xiewen 1; Li, Yaqin 2; Sun, Zhigang 2; Zheng, Junrong 1
刊名	journal of physical chemistry c
	2012-04-12
卷号	116 期号:14 页码:7913-7924
通讯作者	郑俊荣
产权排序	2,7
英文摘要	knowledge about molecular conformations and nuclear and electronic motions on surfaces of metal nanomaterials is critical for many applications but extremely difficult to obtain. we demonstrate that valuable information of this sort can be determined using multiple-mode multiple-dimensional vibrational spectroscopy. a model compound, 4-mercaptophenol, on the surface of 3.5 nm gold nanoparticles demonstrates the method. its 3d molecular conformations and vibrational dynamics on the particle surfaces were determined with the method. the experimental results imply that on the particle surfaces, the ligand molecules cannot form energy-optimized hydrogen bonds because of the surface geometry constraint. the conclusion is supported with experiments on the ligand molecules in the crystalline phase and in a dilute solution. our experiments also showed that the effect of the particle surface nonadiabatic electron/vibration coupling does not play a significant role in the vibrational relaxation of high-frequency modes (>1000 cm(-1)) about 3 angstrom away from the surface. simple theoretical calculations support this observation. the method holds promise as a general tool for the studies of molecular structures and dynamics on the surfaces of nanomaterials. the capability of resolving 3d molecular conformations on nanomaterials surfaces is expected to be helpful for understanding specific intermolecular interactions and conformation-selective reactions (e.g., chirality selectivity) on the surfaces of these materials.
学科主题	物理化学
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	chemistry, physical ; nanoscience & nanotechnology ; materials science, multidisciplinary
研究领域[WOS]	chemistry ; science & technology - other topics ; materials science
关键词[WOS]	2d ir spectroscopy ; vibrational echo spectroscopy ; internal-rotation ; aqueous-solutions ; energy transfer ; metal-particle ; excited-states ; hydrogen-bond ; photon-echo ; spectra
收录类别	SCI
语种	英语
WOS记录号	WOS:000302591300038
公开日期	2013-10-11
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/117882]
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.Rice Univ, Dept Chem, Houston, TX 77005 USA 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Bian, Hongtao,Li, Jiebo,Chen, Hailong,et al. Molecular Conformations and Dynamics on Surfaces of Gold Nanoparticles Probed with Multiple-Mode Multiple-Dimensional Infrared Spectroscopy[J]. journal of physical chemistry c,2012,116(14):7913-7924.
APA	Bian, Hongtao.,Li, Jiebo.,Chen, Hailong.,Yuan, Kaijun.,Wen, Xiewen.,...&Zheng, Junrong.(2012).Molecular Conformations and Dynamics on Surfaces of Gold Nanoparticles Probed with Multiple-Mode Multiple-Dimensional Infrared Spectroscopy.journal of physical chemistry c,116(14),7913-7924.
MLA	Bian, Hongtao,et al."Molecular Conformations and Dynamics on Surfaces of Gold Nanoparticles Probed with Multiple-Mode Multiple-Dimensional Infrared Spectroscopy".journal of physical chemistry c 116.14(2012):7913-7924.