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Research Article

Evolution of all-carboxylate-protected superatomic Ag clusters confined in Ti-organic cages

Xi-Ming Luo1, Chun-Hua Gong1, Xi-Yan Dong1,2, Lei Zhang3 ( ), Shuang-Quan Zang1( )
Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
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Graphical Abstract

Abstract

In this study, the size of the titanium organic cage was controlled to achieve the restricted growth from a single Ag(I) atom (Ag@Ti5) to rare all-carboxylate-protected superatomic Ag cluster (Ag6@Ti6). The classical octahedral Ag64+ cluster with two delocalized electrons (2e) has been encapsulated in a Ti6 organic cage, which shows high stability in air and dimethyformamide (DMF). Furthermore, larger 2e nested double-tetrahedra Ag clusters (Ag86+ and Ag97+) protected using a tetrahedral hollow metalloligand framework (Ag8@Ti4 and Ag9@Ti4) were obtained. Electrospray ionization mass spectrometry (ESI-MS) and density functional theory (DFT) calculations confirmed that there are two delocalized electrons on these small Ag clusters. This study provides a new form of protection for superatomic Ag clusters and provides a feasible strategy for the development of stable Ag clusters.

Keywords

superatomic silver clusteratomic precisiontitanium organic cagestability

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Nano Research
Volume 14 Issue 7,
July 2021
Pages 2309-2313
DOI: 10.1007/s12274-020-3227-5
Cite this article:
Luo X-M, Gong C-H, Dong X-Y, et al. Evolution of all-carboxylate-protected superatomic Ag clusters confined in Ti-organic cages. Nano Research, 2021, 14(7): 2309-2313. https://doi.org/10.1007/s12274-020-3227-5
Topics:
Density functional theoryMass spectrometryNanoclusters

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Received: 25 September 2020
Revised: 05 November 2020
Accepted: 06 November 2020
Published: 05 July 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020
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