Hydride Doping Effects on the Structure and Properties of Eight-Electron Rh/Ag Superatoms: The [RhHx@Ag21-x{S2P(OnPr)2}12] (x = 0-2) Series

Tzu Hao Chiu, Jian Hong Liao, Ying Yann Wu, Jie Ying Chen, Yuan Jang Chen, Xiaoping Wang, Samia Kahlal, Jean Yves Saillard, C. W. Liu

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Three hitherto unknown eight-electron rhodium/silver alloy nanoclusters, [RhAg21{S2P(OnPr)2}12] (1), [RhHAg20{S2P(OnPr)2}12] (2), and [RhH2Ag19{S2P(OnPr)2}12] (3), have been isolated and fully characterized. Cluster 1 contains a regular Rh@Ag12 icosahedral core, whereas 2 and 3 exhibit distorted RhH@Ag12 and RhH2@Ag12 icosahedral cores. The single-crystal neutron structure of 2 located the encapsulated hydride at the center of an enlarged RhAg3 tetrahedron. A similar position was found by neutron diffraction for one of the hydrides in 3, whereas the other hydride is trigonally coordinated to Rh and an elongated Ag-Ag edge. The solid-state structures of 1-3 possess C1 symmetry due to the asymmetric arrangement of the surrounding capping Ag atoms. Our investigation shows that the insertion of one hydride dopant provokes the elimination of one capping silver atom on the cluster surface, resulting in the general formula [RhHx@Ag21-x{S2P(OnPr)2}12] (x = 0-2), which maintains the same number of cluster electrons as well as neutral charge. Clusters 1-3 exhibit an intense emission band in the NIR region. Contrarily to their PdAg21 and PdHAg20 relatives, the 4d orbitals of the encapsulated heterometal are somewhat involved in the optical processes.

Original languageEnglish
Pages (from-to)16739-16747
Number of pages9
JournalJournal of the American Chemical Society
Volume145
Issue number30
DOIs
StatePublished - Aug 2 2023

Funding

This work was supported by the National Science and Technology Council of Taiwan (NSTC 111-2113-M-259-002) and the GENCI French National Computer Resource Center (A0030807367). We thank Dr. R. Marchal for computational help. Single-crystal neutron diffraction performed on TOPAZ used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory, under contract no. DE-AC05-00OR22725 with UT-Battelle, LLC. We thank the Instrumentation Center of National Taiwan Normal University (NSTC 111-2731-M-003-001) and Academia Sinica High-Field NMR Center (HFNMRC) for technical support; HFNMRC is funded by Academia Sinica Core Facility and Innovative Instrument Project (AS-CFII-111-214).

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