末端構造の異なる3系列の金量子ニードルを発見～金ナノクラスター融合反応による異方的伸長～

2025-11-25 東京大学

今回発見した末端構造の異なる3系列の金量子ニードル

＜関連情報＞

• https://www.s.u-tokyo.ac.jp/ja/press/10955/
• https://pubs.acs.org/doi/10.1021/jacs.5c14201

Au24 (SC 2 H 4 Ph)20の熱誘起一次元オリゴマー化により合成された金量子針 Gold Quantum Needles Synthesized by Thermal-Induced, One-Dimensional Oligomerization of Au24(SC2H4Ph)20

Yuya Hamasaki,Ryota Jonoue,Shinjiro Takano,Tatsuya Tsukuda
Journal of the American Chemical Society  Published: November 24, 2025
DOI:https://doi.org/10.1021/jacs.5c14201

Abstract

Gold quantum needles (AuQNs), which have double-pointed cores Au₁–(Au₃)_2+4n–Au₁ (n = 1, 2, 3, etc.) protected by 2-phenylethanethiolate (PET) ligands, have attracted significant attention due to their unique NIR-responsive properties. Herein we demonstrate that these AuQNs can be synthesized through the long-term heating of a highly concentrated solution of Au₂₄(PET)₂₀ without the use of directing templates. Additionally, we obtained two unprecedented series of AuQNs that exhibit intense absorption in the NIR region as minor products. Based on density functional theory calculations, we propose that these two series of AuQNs possess single-truncated Au₁–(Au₃)_5+4n and double-truncated (Au₃)_4+4n cores, respectively. These novel phenomena illustrate the potential of fusion-based synthesis for creating highly anisotropic gold nanostructures.