Hamasaki Yuya, Jonoue Ryota, Takano Shinjiro, Tsukuda Tatsuya
Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
J Am Chem Soc. 2025 Dec 10;147(49):44680-44685. doi: 10.1021/jacs.5c14201. Epub 2025 Nov 24.
Gold quantum needles (AuQNs), which have double-pointed cores Au-(Au)-Au ( = 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 Au(PET) 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 Au-(Au) and double-truncated (Au) cores, respectively. These novel phenomena illustrate the potential of fusion-based synthesis for creating highly anisotropic gold nanostructures.
金量子针（AuQNs）具有由苯乙硫醇盐（PET）配体保护的双尖核Au-(Au)-Au（ = 1, 2, 3等），因其独特的近红外响应特性而备受关注。在此我们证明，这些AuQNs可以通过长时间加热高浓度的Au(PET)溶液来合成，无需使用导向模板。此外，我们还获得了两个前所未有的系列的AuQNs，它们作为次要产物在近红外区域表现出强烈吸收。基于密度泛函理论计算，我们提出这两个系列的AuQNs分别具有单截断的Au-(Au)核和双截断的(Au)核。这些新现象说明了基于融合的合成方法在创建高度各向异性金纳米结构方面的潜力。
