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High photoluminescence from self-assembled Ag2Cl2(dppe)2 clusters through metallophilic interactions

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Title
High photoluminescence from self-assembled Ag2Cl2(dppe)2 clusters through metallophilic interactions
Author(s)
Megalamane S. Bootharaju; Sanghwa Lee; Deng, Guocheng; Hogeun Chang; Woonhyuk Baek; Taeghwan Hyeon
Publication Date
2021-07-07
Journal
JOURNAL OF CHEMICAL PHYSICS, v.155, no.1
Publisher
American Institute of Physics Inc.
Abstract
© 2021 Author(s).Ligand protected metal nanoclusters (NCs) are an emerging class of functional materials with intriguing photophysical and chemical properties. The size and molecular structure play an important role in endowing NCs with characteristic optical and electronic properties. Modulation of these properties through the chemical reactivity of NCs is largely unexplored. Here, we report on the synthesis of self-assembled Ag2Cl2(dppe)2 clusters through the ligand-exchange-induced transformation of [Pt2Ag23Cl7(PPh3)10] NCs [(dppe): 1,2-bis(diphenylphosphino)ethane; (PPh3): triphenylphosphine]. The single crystal x-ray structure reveals that two Ag atoms are bridged by one dppe and two Cl ligands, forming a Ag2Cl2(dppe) cluster, which is subsequently self-assembled through dppe ligands to form [Ag2Cl2(dppe)2]n. Importantly, the Ag2Cl2(dppe)2 cluster assembly exhibits high photoluminescence quantum yield: ∼18%, which is attributed to the metallophilic interactions and rigidification of the ligand shell. We hope that this work will motivate the exploitation of the chemical reactivity of NCs as a new path to attain cluster assemblies endowed with enhanced photophysical properties.
URI
https://pr.ibs.re.kr/handle/8788114/10773
DOI
10.1063/5.0057356
ISSN
0021-9606
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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