Alamgholiloo Hassan, Pesyan Nader Noroozi, Rostamnia Sadegh
Department of Organic Chemistry, Faculty of Chemistry, Urmia University, 57159, Urmia, Iran.
Organic and Nano Group (ONG), Department of Chemistry, Iran University of Science and Technology (IUST), PO Box, 16846-13114, Tehran, Iran.
Sci Rep. 2021 Sep 16;11(1):18417. doi: 10.1038/s41598-021-97914-z.
The stabilization of sub-nanometric metal particles (< 1 nm) with suitable distribution remained challenging in the catalytic arena. Herein, an intelligent strategy was described to anchoring and stabilizing sub-nanometric Pd colloids with an average size of 0.88 nm onto Kryptofix 23 functionalized MCM-41. Then, the catalytic activity of Pd@Kryf/MCM-41 was developed in Stille coupling reaction with a turnover frequency (TOF) value of 247 h. The findings demonstrate that porous MCM-41 structure and high-affinity Kryptofix 23 ligand toward adsorption of Pd colloids has a vital role in stabilizing the sub-nanometric particles and subsequent catalytic activity. Overall, these results suggest that Pd@Kryf/MCM-41 is a greener, more suitable option for large-scale applications and provides new insights into the stabilization of sub-nanometric metal particles.
在催化领域，稳定具有合适分布的亚纳米级金属颗粒（<1纳米）仍然具有挑战性。在此，描述了一种智能策略，用于将平均尺寸为0.88纳米的亚纳米级钯胶体锚定并稳定在经Kryptofix 23功能化的MCM-41上。然后，Pd@Kryf/MCM-41在Stille偶联反应中展现出催化活性，其转换频率（TOF）值为247 h⁻¹。研究结果表明，多孔的MCM-41结构以及Kryptofix 23配体对钯胶体吸附的高亲和力，在稳定亚纳米颗粒及后续催化活性方面起着至关重要的作用。总体而言，这些结果表明Pd@Kryf/MCM-41是大规模应用中更绿色、更合适的选择，并为亚纳米级金属颗粒的稳定化提供了新的见解。
