| Autor: |
Kim, Sinhyeop, Kim, Hyesun, Lee, Changhoon, Park, Ina, Kim, Younghoon, Moon, Dohyun, Shim, Ji Hoon, Ryu, Sunmin, Park, Sarah S. |
| Zdroj: |
ACS Nano; October 2024, Vol. 18 Issue: 42 p29036-29044, 9p |
| Abstrakt: |
The atomically precise metal nanoclusters (NCs) have attracted significant attention due to their superatomic behavior originating from the quantum confinement effect. This behavior makes these materials suitable for various photoluminescence-based applications, including chemical sensing, bioimaging, and phototherapy, owing to their intriguing optical properties. Especially, the manipulation of inter- or intracluster interaction through cluster-assembled materials (CAMs) presents significant pathways for modifying the photophysical properties of NCs. Herein, two distinct CAMs, Au25–Zn-Hexand Au25–Zn-Rod, were synthesized via forming a coordination bond between [Au25(p-HMBA)18]−(p-H2MBA = 4-mercaptobenzoic acid) and Zn2+. Au25–Zn-Rodexhibited a 6-fold higher luminescence intensity in the near-infrared region compared to Au25–Zn-Hex, attributed to synergistic inter- and intracluster interactions that induce exciton delocalization and structure rigidification at the atomic scale. This study highlights the potential of diverse lattice symmetries in cluster-based frameworks for tuning the photophysical properties, contributing to a deeper understanding of the structure–property relationship in Au NCs. |
| Databáze: |
Supplemental Index |
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