Self-organized films of supramolecular coordination polymers and their materials transport properties

超分子配位聚合物自组织薄膜及其材料传输性能

• 批准号: 225206504
• 负责人: Professor Dr. Bernd Tieke
• 金额: --
• 依托单位: Institut für Physikalische Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/225206504?language=en
• 关键词: Self; organized; films; supramolecular; coordination

Coordinative layer-by-layer adsorption of metal ions and polymers with ligands as substituents (polytopic ligands) will be used to build up ultrathin films and separation membranes of coordination polymer networks and to study their materials transport properties. Up to now there is little knowledge about the use of coordination polymers as separation membranes. Starting point of the work will be the synthesis of suitable polymers with ligands as substituents (polytopic ligands) The preparation will be carried out as radical copolymerization of vinyl- and acrylic monomers, one of the comonomers (A) containing a ligand group. The other comonomer (B) will be varied such that copolymers with different hydrophilic properties, charge, and pH-, temperature- or potential-sensitive behaviour are formed.The deposited films will be investigated on their structural properties (optical absorption, film thickness, morphology, metal content). The membranes will be prepared upon layer-by-layer adsorption of various copolymers and metal salts on porous substrates. The network density of the membranes is varied by changing the comonomer ratio A:B of the copolymer. The materials transport will be investigated by measuring the permeation rates of salts and neutral molecules in aqueous and organic solution under conditions of diffusion dialysis and nanofiltration. Membranes of different network density will be studied. Membranes containing polymers with cationic or anionic comonomer units should be able to act as cation or anion exchangers. This will be proven studying the example of desalination and deacidification of aqueous electrolyte solutions under electrodialysis conditions. The possibility to prepare switchable membranes will also be studied. For this purpose membranes containing copolymers with redox-active components or pH- and temperature-sensitive sequences will be studied. For these membranes it will be tried to influence their flux and selectivity by changing the state of oxidation, the pH or the temperature.

将金属离子和配体的聚合物作为取代基（多功能配体）逐层吸附的协调性吸附，以建立超薄膜和协调聚合物网络的分离膜并研究其材料运输特性。到目前为止，几乎没有关于使用协调聚合物作为分离膜的知识。工作的起点将是将合适的聚合物与配体作为取代基（多重配体）的合成，将作为乙烯基和丙烯酸单体的自由基共聚作品进行制备，这是含有配体组的共聚物（A）。其他联合体（b）将变化，以使具有不同亲水性能，电荷和pH，温度或潜在敏感行为的共聚物被形成。沉积膜将研究其结构特性（光学吸收，膜厚度，膜厚度，形态学，金属含量）。膜将在多孔底物上的各种共聚物和金属盐的逐层吸附上制备。膜的网络密度通过更改共聚物的共聚物a：b而变化。在扩散透析和纳米滤过的条件下，将研究材料的运输，以测量水和有机溶液中盐和中性分子的渗透率。将研究不同网络密度的膜。含有阳离子或阴离子共同体单元的聚合物的膜应该能够充当阳离子或阴离子交换器。这将被证明是研究在电透析条件下水溶液溶液的脱盐和脱脱酸的例子。还将研究准备可切换膜的可能性。为此，将研究含有氧化还原活性成分或pH和温度敏感序列的共聚物的膜。对于这些膜，将尝试通过改变氧化，pH或温度来影响其通量和选择性。