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题名: Ultrafast relaxation dynamics of phosphine-protected, rod-shaped Au-20 clusters: interplay between solvation and surface trapping
作者: Zhou, Meng1, 2;  Long, Saran1, 2;  Wan, Xiankai3;  Li, Yang1, 2;  Niu, Yingli1, 2;  Guo, Qianjin1, 2;  Wang, Quan-Ming3;  Xia, Andong1, 2
刊名: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
发表日期: 2014-09-14
DOI: 10.1039/c4cp02336f
卷: 16, 期:34, 页:18288-18293
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Physics
英文摘要: The exact interaction between Au cores and surface ligands remains largely unknown because of the complexity of the structure and chemistry of ligand/Au-core interfaces in ligand-protected Au nanoclusters (AuNCs), which are commonly found in many organic-inorganic complexes. Here, femtosecond transient absorption measurement of the excited-state dynamics of a newly synthesized phosphine-protected cluster [Au-20(PPhPY2)(10)Cl-4]Cl-2 (1) is reported. Intramolecular charge transfer (ICT) from the Au core to the peripheral ligands was identified. Furthermore, we found that solvation strongly affected ICT at ligand/Au-core interfaces while by choosing several typical alcoholic solvents with different intrinsic solvation times, we successfully observed that excited-state relaxation dynamics together with displacive excited coherent oscillation of Au20 clusters were significantly modulated through the competition between solvation and surface trapping. The results provide a fundamental understanding of the structure-property relationships of the solvation-dependent core-shell interaction of AuNCs for the potential applications in catalysis, sensing and nanoelectronics.
关键词[WOS]: INTRAMOLECULAR CHARGE-TRANSFER ;  EXCITED-STATE ;  GOLD CLUSTERS ;  TRANSIENT ABSORPTION ;  ACOUSTIC VIBRATIONS ;  STOKES SHIFT ;  NANOCLUSTERS ;  EXCITATION ;  NANOPARTICLES ;  LUMINESCENCE
语种: 英语
WOS记录号: WOS:000341064600029
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145895
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Chem, State Key Lab Mol React Dynam, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
3.Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Fujian, Peoples R China

Recommended Citation:
Zhou, Meng,Long, Saran,Wan, Xiankai,et al. Ultrafast relaxation dynamics of phosphine-protected, rod-shaped Au-20 clusters: interplay between solvation and surface trapping[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2014,16(34):18288-18293.
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