1,1'-二茂铁二羧酸/四氢呋喃诱导水中多层结构碳酸钙沉淀,CrystEngComm

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1,1'-二茂铁二羧酸/四氢呋喃诱导水中多层结构碳酸钙沉淀
CrystEngComm ( IF 2.6 ) Pub Date : 2021-09-21 , DOI: 10.1039/d1ce00763g
Lihong Zhou _{1,

2} , Guanghui Wang ₁ , Jie Du ₃ , Qinjiang Zhao ₂ , Xiang Pei _{2,

4}

Affiliation

有机溶剂和配体系统已成功应用于调节有机化学中金属离子的配位。受先前工作的启发，我们对 1,1'-二茂铁二甲酸 (FA)/四氢呋喃 (THF，非质子溶剂) 对碳酸钙 (CaCO ₃ )沉淀的影响进行了研究。系统地研究了 FA 浓度的影响，以实现可控和可靠的 CaCO ₃颗粒。作为对照，研究了 H ₂ O-THF 溶液对 CaCO ₃沉淀的影响，并与 H ₂进行了比较。O-1,4-二恶烷溶液。结果表明，水溶液中 FA/THF 的存在不仅影响沉淀物的尺寸和形态，而且还决定了 CaCO _{3 的}多晶型。溶剂中THF的比例影响CaCO ₃的多晶型分布。THF的存在导致棒状CaCO ₃的形成，溶剂中THF的比例越高，发现的CaCO ₃颗粒的尺寸越小。这是醚溶剂的共同特征，在相同的实验条件下，使用 1,4-二恶烷可以获得相同的结果。FA是为方解石的形成的驱动力，这可能堆叠的CaCO ₃碳酸钙的表面上的层₃由 THF 诱导的粒子。产品呈现多层次结构。该结果揭示了 FA 和乙醚溶液在 CaCO ₃沉淀过程中的作用机理，并开辟了一条新的合成途径来调控 CaCO ₃沉淀的多层次结构。

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1,1′-Ferrocenedicarboxylic acid/tetrahydrofuran induced precipitation of calcium carbonate with a multi-level structure in water

A system of organic solvents and ligands had been successfully applied to regulate the coordination of metal ions in organic chemistry. Inspired by previous work, we conducted a study on the effect of 1,1′-ferrocenedicarboxylic acid (FA)/tetrahydrofuran (THF, aprotic solvent) on the precipitation of calcium carbonate (CaCO₃). The influence of FA concentrations was systematically investigated to achieve controllable and reliable CaCO₃ particles. As a control, the effect of H₂O–THF solutions on CaCO₃ precipitation was explored and compared with that of H₂O-1,4-dioxane solutions. It was demonstrated that the presence of FA/THF in water solutions not only affected the dimensions and morphology of the precipitates but also determined the CaCO₃ polymorphism. The proportion of THF in the solvent affects the polymorphism distribution of CaCO₃. The presence of THF led to the formation of rod-like CaCO₃, and the higher the proportion of THF in the solvent, the smaller the size of CaCO₃ particles found. This was a common feature of ether solvents, and identical results could be obtained with 1,4-dioxane under the same experimental conditions. FA was the driving force for the formation of calcite, which could stack CaCO₃ layers on the surface of CaCO₃ particles induced by THF. The product exhibited a multi-level structure. The results shed light on the mechanism of FA and ether solutions during precipitation of CaCO₃ and opened a novel synthetic avenue of regulating CaCO₃ precipitation with a multi-level structure.

更新日期：2021-10-15

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