A 200‐fold Quantum Yield Boost in the Photoluminescence of Silver‐Doped AgxAu25−x Nanoclusters: The 13 th Silver Atom Matters1. Issue 9 (28th January 2014)

• Record Type: Journal Article
• Authors: Wang, Shuxin; Meng, Xiangming; Das, Anindita; Li, Tao; Song, Yongbo; Cao, Tiantian; Zhu, Xiuyi; Zhu, Manzhou; Jin, Rongchao
• Is Part Of: Angewandte Chemie international edition. Volume 53:Issue 9(2014)
• Page Start: 2376
• Page End: 2380
• Publication Date: 2014-01-28
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201307480
• Languages: English
• ISSNs: 1433-7851

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The rod‐shaped Au₂₅ nanocluster possesses a low photoluminescence quantum yield (QY=0.1 %) and hence is not of practical use in bioimaging and related applications. Herein, we show that substituting silver atoms for gold in the 25‐atom matrix can drastically enhance the photoluminescence. The obtained Ag_{<italic>x</italic>}Au_{25−<italic>x</italic>} (<italic>x</italic>=1–13) nanoclusters exhibit high quantum yield (QY=40.1 %), which is in striking contrast with the normally weakly luminescent Ag_{<italic>x</italic>}Au_{25−<italic>x</italic>} species (<italic>x</italic>=1–12, QY=0.21 %). X‐ray crystallography further determines the substitution sites of Ag atoms in the Ag_{<italic>x</italic>}Au_{25−<italic>x</italic>} cluster through partial occupancy analysis, which provides further insight into the mechanism of photoluminescence enhancement.</p> </abstract>