Sun Shengtong, Gebauer Denis, Cölfen Helmut
Department of Chemistry , Physical Chemistry , University of Konstanz , Universitätsstrasse 10 , Box 714 , D-78457 Konstanz , Germany . Email:
Chem Sci. 2017 Feb 1;8(2):1400-1405. doi: 10.1039/c6sc02333a. Epub 2016 Oct 13.
While nature exerts precise control over the size and chemical composition of minerals, this is still a challenging task for artificial syntheses. Despite its significance, until now, there are still no reports on colloidal mineral nanoparticles in the subnanometer range. Here we developed a general gas diffusion strategy using 10,12-pentacosadiynoic acid as a ligand and ethanol as a solvent to fabricate stable amorphous mineral clusters with a core size of less than 2 nm. First discovered for CaCO, the method was successfully extended to produce monolayer protected clusters of MgCO, SrCO, Eu(CO), Tb(CO), Ce(CO), Ca (PO) , CaCO and their hybrid minerals, Ca Mg (CO) and Ca (CO) (PO) . All the mineral clusters can be well dispersed in organic solvents like toluene, and are stable for a long period without further crystallization. Our work paves a way for the artificial synthesis of colloidal mineral clusters, which may have various uses in both fundamental research and industry.
虽然自然界能对矿物的尺寸和化学成分进行精确控制，但这对人工合成来说仍是一项具有挑战性的任务。尽管其意义重大，但迄今为止，仍没有关于亚纳米级胶体矿物纳米颗粒的报道。在此，我们开发了一种通用的气体扩散策略，使用10,12-二十五碳二炔酸作为配体，乙醇作为溶剂，来制备核心尺寸小于2纳米的稳定无定形矿物簇。该方法最初是针对CaCO发现的，随后成功扩展到制备MgCO、SrCO、Eu(CO)、Tb(CO)、Ce(CO)、Ca(PO)、CaCO及其混合矿物CaMg(CO)和Ca(CO)(PO)的单层保护簇。所有的矿物簇都能很好地分散在甲苯等有机溶剂中，并且长时间稳定，不会进一步结晶。我们的工作为胶体矿物簇的人工合成铺平了道路，其在基础研究和工业中可能有多种用途。
