Thermochemical investigations of phase formation processes of elements and compounds of group 15 and 16 in ionic liquid based synthesis - Mechanism of dissolution, structure formation and precipitation

离子液体合成中第 15 族和第 16 族元素和化合物的相形成过程的热化学研究 - 溶解、结构形成和沉淀机制

• 批准号: 253339909
• 负责人: Professor Dr. Peer Schmidt
• 金额: --
• 依托单位: Fachgebiet Anorganische Chemie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/253339909?language=en
• 关键词: Thermochemical; investigations; phase; formation; processes

Within this project, significant contributions can be made for physico-chemical investigation of reactions in ionic liquids as well as for determination of thermal stability of syntheses mixtures and thermodynamic properties of products (low temperature materials). The methodical investigation of basic model systems and the development of new materials syntheses in systems containing elements of groups 15 and 16 is aspired. Thereby, the chemical focus is set on differentiation of element allotropes in low temperature synthesis, the directed synthesis of compounds of groups 15 and 16 with defined composition within the homogeneity range, and preparation of Bismuth-based layer compounds. Additionally, the formation of homoatomic and heteroatomic poly-cationic compounds with incorporation of IL flux components is aimed.Studies on the mechanism of dissolution, phase formation, and precipitation can be realized using reaction calorimetry, spectroscopy, and dynamic scanning calorimetry (DSC). For comprehension of reaction pathways of syntheses above room temperature the thermal behavior and the reactivity of products of thermal decomposition of ionic liquids and their flux systems is to involve in our investigations. The determination of thermodynamic standard data allows modeling using CalPhaD-methods and thus enables a comprehensive thermodynamic description of reaction pathways and phase relations of the respective chemical systems.

在该项目中，可以为离子液体中反应的物理化学研究以及合成混合物的热稳定性和产物（低温材料）的热力学性质的测定做出重大贡献。基本模型系统的有条理的调查和新材料合成的发展，在系统中含有第15和16族元素的愿望。因此，化学重点是在低温合成中区分元素同素异形体，在均匀范围内定向合成具有限定组成的第15和16族化合物，以及制备铋基层化合物。此外，还利用反应量热法、光谱法和动态扫描量热法（DSC）对溶解、相形成和沉淀的机理进行了研究。为了更好地理解室温以上合成的反应途径，我们对离子液体及其助熔剂体系的热行为和热分解产物的反应性进行了研究。热力学标准数据的确定允许使用CalPhaD方法进行建模，从而能够对各个化学系统的反应途径和相关系进行全面的热力学描述。