Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Institute of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230601, P. R. China.
Department of Chemistry, Center for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui 230601, P. R. China.
J Phys Chem Lett. 2021 Jul 22;12(28):6654-6660. doi: 10.1021/acs.jpclett.1c01713. Epub 2021 Jul 13.
Halogens have widely served as handles for regulating the growth of nanoparticles and the control of their physicochemical properties. However, their regulatory mechanism is poorly understood. Nanoclusters are the early morphology of nanoparticles and play an important role in revealing the formation and growth of nanoparticles due to their precise structures. Here, we report that halogens induce the anisotropic growth of Ag(CHCOO)(SR)(CHCN) (, where SR = 4--butylbenzylmercaptan) into Ag(CHCOO)(SR)Cl (), where is converted from Ag(CHCOO)(SR) (). Experiments and theoretical simulations showed that halogen ions adsorb at both ends of the cluster, forming defect sites. The -SR-Ag- complexes fill the defects and complete the anisotropic transition from to . Circular dichroism spectra show that the chirality of decreases 15-fold compared with that of . This work provides important insights into the effects of halogens on the growth mechanism and property regulation for nanomaterials at the atomic level and the benefits of further applications of halogen-induced nanomaterials.
卤素广泛用于调节纳米粒子的生长和控制其物理化学性质。然而，它们的调节机制还不太清楚。纳米团簇是纳米粒子的早期形态，由于其精确的结构，在揭示纳米粒子的形成和生长方面起着重要作用。在这里，我们报告卤素诱导 Ag(CHCOO)(SR)(CHCN)（其中 SR = 4--丁基苯甲基硫醇）各向异性生长为 Ag(CHCOO)(SR)Cl（），其中是由 Ag(CHCOO)(SR)（）转化而来的。实验和理论模拟表明，卤素离子吸附在团簇的两端，形成缺陷位。-SR-Ag- 络合物填充缺陷，完成从到的各向异性转变。圆二色光谱表明，与相比，的手性降低了 15 倍。这项工作为卤素在原子水平上对纳米材料生长机制和性能调控的影响提供了重要的见解，并为进一步应用卤素诱导的纳米材料带来了好处。
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