Ultrafast relaxation dynamics of phosphine-protected, rod-shaped Au-20 clusters: interplay between solvation and surface trapping

doi:10.1039/c4cp02336f

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	Ultrafast relaxation dynamics of phosphine-protected, rod-shaped Au-20 clusters: interplay between solvation and surface trapping
	Zhou, Meng 1,2; Long, Saran 1,2; Wan, Xiankai 3; Li, Yang 1,2; Niu, Yingli 1,2; Guo, Qianjin 1,2; Wang, Quan-Ming 3; Xia, Andong 1,2
刊名	PHYSICAL CHEMISTRY CHEMICAL PHYSICS
	2014-09-14
卷号	16 期号:34 页码:18288-18293
ISSN号	1463-9076
DOI	10.1039/c4cp02336f
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.
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000341064600029
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/53055]
专题	中国科学院化学研究所
通讯作者	Guo, Qianjin
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
推荐引用方式 GB/T 7714	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.
APA	Zhou, Meng.,Long, Saran.,Wan, Xiankai.,Li, Yang.,Niu, Yingli.,...&Xia, Andong.(2014).Ultrafast relaxation dynamics of phosphine-protected, rod-shaped Au-20 clusters: interplay between solvation and surface trapping.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,16(34),18288-18293.
MLA	Zhou, Meng,et al."Ultrafast relaxation dynamics of phosphine-protected, rod-shaped Au-20 clusters: interplay between solvation and surface trapping".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 16.34(2014):18288-18293.