稀土羧酸金属有机骨架膜材料的可控制备及应用探索

Because of the great surface area, high porosity, chemical modification and other advantages, rare earth metal organic framework membrane materials have attracted wide attention. However, the present synthetic membrane materials are small, not continuous, and defective. As a result, the development and research of these materials in practical applications is relatively weak.. We start from the synthesis of rare earth carboxylate metal-organic-framework (MOF) materials, by optimizing synthesis conditions to control the crystal morphology and size. Through the in situ method and crystalline-seed method, prepare the continuous and dense rare earth carboxylate MOF films. And then deposit the metal nanoparticles and dye to eventually realize the application of functional film in catalysis, optics and separation filed. On one hand, by changing the reaction conditions to improve nucleation rate, we can control the size and morphology of the products. By carrier modification and induction method, we can promote its consistent and homogeneous nucleation resulting in a large area on the functional film. On the other hand, through deposition of the metal nanoparticles and dye, the film is used for catalytic, optical devices, separation and so on, which has important significance to the development and application of inorganic films.

稀土金属有机骨架膜材料由于具有较大的比表面积、较高的孔隙率、骨架可化学修饰等优点，受到广泛的关注。然而目前合成的膜材料存在面积小、不连续、有缺陷，并且对这些膜材料在实际应用方面的开发和研究也比较薄弱。. 我们从稀土羧酸金属有机骨架材料的合成出发，对合成条件进行优化，提高稀土羧酸金属有机骨架材料的成核率，控制晶体的大小和形貌并且抑制其在溶剂中成核，通过载体修饰法和晶种诱导法促使其在载体上一致并均匀成核，从而得到大面积、连续致密的稀土羧酸金属有机骨架膜材料，并对其进行染料组装和金属纳米粒子沉积，将所得的稀土羧酸金属有机骨架膜材料功能化制成器件，充分利用稀土离子独特的光电性能，最终实现膜在催化、光学和分离等方面真正的应用，这对无机膜的开发和利用具有重要意义。

稀土金属有机配位聚合物作为MOF 家族的一名重要成员，因其丰富的配位能力、优异的光学和磁学性质而备受关注。通过选择有机配体和无机基本结构单元，科研工作者报道了大量的稀土MOF 材料，其中很多结构都表现出优异的荧光性质，一些还具有分子、离子识别功能，然而关于稀土MOF材料的研究和应用多集中在体相材料上，关于纳米尺度的研究相对较少，关于纳米的近红外的研究则少之又少。项目组以前期工作为基础，利用研究室先进实验条件，通过选择合适的稀土羧酸金属有机骨架材料作为无机纳米材料的合成前驱体，从优化稀土羧酸金属有机骨架材料的合成入手，通过恰当的合成条件来控制晶体形貌和大小，在此基础上来优化稀土羧酸金属有机骨架材料膜的合成条件。并对整个金属有机骨架膜进行全面表征，对稀土羧酸金属有机骨架膜在光学度传感，各向异性光学响应，磁学等性能方面进行了深入系统的研究，取得了一系列创新性研究成果。上述研究工作在Adv. Funct. Mater., CrystEngComm, J. Solid State Chem.等杂志发表研究论文3篇，受到同行的广泛关注。