Issue 28, 2024

Assembly of anionic silver nanoclusters with controlled packing structures through site-specific ionic bridges

Abstract

The assembly of metal nanoclusters (NCs) into crystalline lattice structures is of interest in the development of NC-based functional materials. Here we demonstrate that the assembled structures of tri-anionic tetrahedral symmetric [Ag29(BDT)12]3− (Ag29 NC, BDT: 1,3-benzenedithiol) NCs are controlled into a polyethylene-like zigzag chain and a “poly-ring-fused-cyclohexane”-like honeycomb arrangement through ionic interactions with alkali metal cations such as K+ and Cs+. The site-specific binding of alkali metal ions on the tetrahedrally arranged binding sites of Ag29 NCs successfully connects the adjacent NCs into various packing modes. The number and type of bridges between NCs determine the Ag29 NC packing structures, which are affected by the solvent species, enabling the transformation of packing modes in the single-crystalline state. The photoluminescence (PL) properties of the crystals responded to the packing modes of the NCs in terms of anisotropy and bridge linkage style inducing a varied degree of relaxation of the excited state depending on the relocation mobility of alkali metal ions in the crystals.

Graphical abstract: Assembly of anionic silver nanoclusters with controlled packing structures through site-specific ionic bridges

Supplementary files

Article information

Article type
Paper
Submitted
18 Apr. 2024
Accepted
11 Jūn. 2024
First published
12 Jūn. 2024
This article is Open Access
Creative Commons BY-NC license

Nanoscale, 2024,16, 13457-13463

Assembly of anionic silver nanoclusters with controlled packing structures through site-specific ionic bridges

W. Ishii, R. Tanaka and T. Nakashima, Nanoscale, 2024, 16, 13457 DOI: 10.1039/D4NR01691B

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