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Updated: Jan 9, 2026

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
σ-Aromatic Ge-Sn Bridges in a Triply-Bonded Bare Cluster Dimer with a Long-Lived Triplet State
Ya-Shan Huang1, Ziqi Deng2, Wen-Juan Tian3
1State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Tianjin Key Lab for Rare Earth Materials and Applications, School of Materials Science and Engineering, Nankai University, Tianjin 300350, China.
Abstract:
Constructing extended cluster aggregates requires a deeper understanding of strategies for connecting structural motifs. Herein, we report the synthesis and structural elucidation of the triply bonded dimeric cluster [(Rh@Sn8)2Ge2]4- (1a), which features a delocalized bonding framework arising from the connection of two spherical aromatic [Rh@Sn8] units via two unique 6σ-aromatic [GeSn4] bridges. The resulting framework simultaneously exhibits global aromaticity and multiple localized aromatic fragments, highlighting a rational route toward controlled cluster growth and offering new synthetic avenues for cluster-based bulk materials. Moreover, femtosecond-to-nanosecond transient absorption spectroscopy revealed an exceptionally long-lived triplet excited state (τav = 178 μs) for [(Rh@Sn8)2Ge2]4-, significantly longer than those reported for metal nanoclusters in the condensed phase. This finding supplements the limited excited-state features of bare metal nanoclusters and provides a new strategy for achieving prolonged excited-state lifetimes in cluster systems.
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