DICP OpenIR
Subject Area物理化学
Molecular Conformations and Dynamics on Surfaces of Gold Nanoparticles Probed with Multiple-Mode Multiple-Dimensional Infrared Spectroscopy
Bian, Hongtao1; Li, Jiebo1; Chen, Hailong1; Yuan, Kaijun1; Wen, Xiewen1; Li, Yaqin2; Sun, Zhigang2; Zheng, Junrong1; Zheng JR(郑俊荣)
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
2012-04-12
DOI10.1021/jp300970p
Volume116Issue:14Pages:7913-7924
Indexed BySCI
SubtypeArticle
Department11
Funding Project1102
Contribution Rank2,7
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS Keyword2D IR SPECTROSCOPY ; VIBRATIONAL ECHO SPECTROSCOPY ; INTERNAL-ROTATION ; AQUEOUS-SOLUTIONS ; ENERGY TRANSFER ; METAL-PARTICLE ; EXCITED-STATES ; HYDROGEN-BOND ; PHOTON-ECHO ; SPECTRA
AbstractKnowledge 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.
Language英语
WOS IDWOS:000302591300038
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/117882
Collection中国科学院大连化学物理研究所
Corresponding AuthorZheng JR(郑俊荣)
Affiliation1.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
Recommended Citation
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.,...&郑俊荣.(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.
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