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Kinetic Study on the Self-Assembly of Au(I)–Thiolate Lamellar Sheets: Preassembled Precursor vs Molecular Precursor
The Journal of Physical Chemistry A ( IF 2.7 ) Pub Date : 2018-05-25 00:00:00 , DOI: 10.1021/acs.jpca.8b02103
Chuying Dai 1 , Yajiao Hao 1 , Yang Yu 1 , Minjie Li 1 , Sean Xiao-An Zhang 1
Affiliation  

Molecular self-assembly has played an important role in nanofabrication. Due to the weak driving forces of noncovalent bonds, developing molecular nanoassemblies that have both robust preparation conditions and stable structure is a challenge. In our previous work, we have developed a reversible self-assembly system of Au(I)–thiolate coordination polymer (ATCP) to form colloidal lamellar sheets and demonstrated the high tailorability and stability of their structures, as well as their promising applications in gold nanocluster/nanoparticle fabrication and UV light shielding. Here, we first reported our progress in exploring a robust and green assembly protocol toward ATCP colloidal lamellar sheets in water by allowing the molecular precursors of HAuCl4 and the thiol ligand to form ATCP preassembled intermediates. In this way, colloidal ATCP lamellar sheets can be prepared in a wide range of synthetic concentrations ([Au]0 ≥ 2 × 10–4 M) and at broad assembly temperatures (80–100 °C) with similar high yields (>80%). The assembly kinetics at different conditions are also studied in detail to help understand the robust assembly process. The robust and green synthetic protocols will pave a way for their real applications.

中文翻译:

Au(I)-硫醇盐层状片材自组装的动力学研究:预组装前体与分子前体

分子自组装在纳米加工中发挥了重要作用。由于非共价键的驱动力弱,因此开发具有稳定制备条件和稳定结构的分子纳米组件是一个挑战。在我们以前的工作中,我们已经开发了可逆的自组装金(I)-硫醇盐配位聚合物(ATCP)形成胶体层状薄片,并证明了其结构的高度可定制性和稳定性,以及它们在金中的应用前景广阔纳米簇/纳米颗粒制造和紫外线屏蔽。在这里,我们首先报告了通过允许HAuCl 4的分子前体物探索针对水中ATCP胶体层状薄片的稳健而绿色的组装方案的进展。与硫醇配体形成ATCP预组装中间体。以这种方式,胶体ATCP层状片材可在宽范围内合成的浓度([金]制备0 ≥2×10 -4 M),并在广泛的装配温度(80-100℃)下具有类似高收率(> 80 %)。还对不同条件下的组装动力学进行了详细研究,以帮助理解坚固的组装过程。强大而绿色的合成协议将为其实际应用铺平道路。
更新日期:2018-05-25
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