Quantum clusters of gold exhibiting FRET

被引：120

作者：

Muhammed, M. A. Habeeb ^{[2
,3
]}

Shaw, Ajay Kumar ^{[1
]}

Pal, Samir Kumar ^{[1
]}

Pradeep, T. ^{[2
,3
]}

机构：

[1] Satyendra Nath Bose Natl Ctr Basic Sci, Dept Chem Biol & Macromol Sci, Unit Nanosci & Technol, Kolkata 700098, India

[2] Indian Inst Technol, Dept Chem, DST Unit Nanosci, Madras 600036, Tamil Nadu, India

[3] Indian Inst Technol, Sophisticated Analyt Instrument Facil, Madras 600036, Tamil Nadu, India

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 37期

关键词：

D O I：

10.1021/jp804597r

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Fluorescence resonance energy transfer between the metal core and the ligand in Au(25)SG(18) (SG-glutathione thiolate) is demonstrated using dansyl chromophores attached to the cluster core through glutathione linkers. The dansyl chromophore functionalization of the cluster has been carried out by two different routes. Efficient energy transfer from the dansyl donor to the Au-25 core is manifested by way of the reduced lifetime of the excited state of the former and drastic quenching of its fluorescence. The donor-acceptor separation observed in the two synthetic routes reflects the asymmetry in the ligand binding on the cluster core, which is in agreement with the recent theoretical and experimental results on the structure of Au-25.

引用

页码：14324 / 14330

页数：7

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