Dipartimento di Chimica Organica e Industriale and Unità INSTM Sez. 4-UdR Parma, Università di Parma, viale Usberti 17/a, 43124 Parma, Italy.
Chemistry. 2010 Sep 24;16(36):11089-99. doi: 10.1002/chem.201001039.
A series of gold nanoparticles (AuNPs) stabilized by monodentate, bidentate, and tridentate thiolate calix[n]arene ligands 1-3 was prepared by using the Brust-Schiffrin two-phase direct synthesis and characterized with NMR spectroscopy, elemental analysis, transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The experimental data show that the particular multidentate structure of calix[n]arene derivatives 2 and 3 introduces a control element in the preparation of the gold nanoparticles that allows, in the particular experimental conditions here reported, to obtain very small (≈1 nm) AuNPs. These are the first experimental findings that identify a role of ligand "denticity" in the determination of the nuclearity of nanoparticles.
一系列由单齿、双齿和三齿硫醇冠醚配体 1-3 稳定的金纳米粒子（AuNPs）通过 Brust-Schiffrin 两相直接合成法制备，并通过 NMR 光谱、元素分析、透射电子显微镜（TEM）和 X 射线光电子能谱（XPS）进行了表征。实验数据表明，冠醚衍生物 2 和 3 的特殊多齿结构在金纳米粒子的制备中引入了一个控制因素，使得在本文报道的特定实验条件下，可以获得非常小的（≈1nm）AuNPs。这是首次发现配体“齿密度”在确定纳米粒子的核数方面起着作用的实验结果。
