Targeting Ordered Heteroanionic Materials Using Electrosynthesis

利用电合成靶向有序杂阴离子材料

• 批准号: RGPIN-2022-04779
• 负责人: Wustrow, Allison
• 金额: $ 1.82万
• 依托单位: Université de Sherbrooke
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=748722
• 关键词: Targeting; Ordered; Heteroanionic; Materials; Using

Materials synthesis defines ages. Progression from the bronze age to the iron age only became possible as humans learned how to successfully reduce iron ore into its metallic form. Similarly, modern advances in synthetic technology have lead to the information revolution, and will play a major role in the upcoming quantum era. In order to ensure synthetic science can keep pace with the demands of new technology, it is important to explore new methodologies. Polar materials have unique properties related to their symmetry, including second harmonic generation, piezoelectricity, coupling to dark matter, and unique magnetic properties. Most synthetic schemes to target these materials involve using a polar moiety as a building block, and relying on chance to create a crystal structure with a net polar moment. However, these dipoles will frequently anti-align within a structure, creating a material which is centrosymmetric. By using electrosynthesis, I plan to target non-centrosymmetric materials. Electrosynthesis involves applying an electric bias to a solid state reaction during heating, which will cause heteroanionic materials to be more likely to form polar structures. By adding the extra dimension of voltage to the phase diagram, new materials will be formed in space groups which allow for properties which can only exist in non-centrosymmetric environments. This technique will also be useful for creating ordering in heteroanionic materials. Heteroanionic materials are of great interest in the fields of battery chemistry, photovoltaics and other applications where the optical and electronic properties are of interest. This interest results from the tunability of these systems. However, although anion ordering has been shown to affect these properties it is frequently difficult to control. I plan to use electrosynthesis to induce order/disorder transitions in heteroanionic species, as the anions will have an energetic benefit to aligning parallel to the applied field. By creating a controlled method to induce order in disordered heteroanionic systems, I will be able to conduct a systematic study the relationship between anion placement and optical and electronic properties. In the first 5 years, I plan to develop the methodology for electrosynthesis, proving that this is a viable method for targeting polar materials and determining the limitations of the technique. In the long term, I plan to use this technique to create designer materials to allow the detection of dark matter, and second harmonic generation in the deep UV, and other applications that rely on properties unique to polar materials. Developing new synthetic schemes to make materials which are magnetically interesting will increase the strength of the national research in the field of innovative processes and quantum science. This work will continue to allow Canada to be an international leader in these fields.

材料合成定义年龄。只有当人类学会了如何成功地将铁矿石还原成金属形式时，才有可能从青铜时代发展到铁器时代。同样，合成技术的现代进步导致了信息革命，并将在即将到来的量子时代发挥重要作用。为了保证综合科学能够跟上新技术的要求，探索新的方法论是重要的。 极性材料具有与其对称性相关的独特性质，包括二次谐波产生、压电性、与暗物质的耦合以及独特的磁性。针对这些材料的大多数合成方案涉及使用极性部分作为构建块，并依赖于机会来创建具有净极距的晶体结构。然而，这些偶极子将经常在结构内反对齐，从而产生中心对称的材料。通过使用电合成，我计划以非中心对称材料为目标。电合成涉及在加热期间向固态反应施加电偏压，这将导致杂阴离子材料更可能形成极性结构。通过在相图中增加额外的电压维度，新的材料将在空间群中形成，这些空间群允许只能存在于非中心对称环境中的属性。 这种技术也将有助于在杂阴离子材料中产生有序。杂阴离子材料在电池化学、光致发光和其他感兴趣的光学和电子性质的应用领域中具有极大的兴趣。这种兴趣源于这些系统的可调谐性。然而，尽管阴离子有序化已被证明会影响这些性质，但通常难以控制。我计划使用电合成来诱导杂阴离子物种的有序/无序转变，因为阴离子将具有与所施加的场平行排列的能量效益。通过创造一种可控的方法来诱导无序杂阴离子系统的秩序，我将能够进行系统的研究阴离子的位置和光学和电子性能之间的关系。在前5年，我计划开发电合成的方法，证明这是一种针对极性材料的可行方法，并确定该技术的局限性。从长远来看，我计划使用这种技术来创建设计师材料，以允许检测暗物质，深紫外线中的二次谐波产生，以及其他依赖于极性材料独特特性的应用。开发新的合成方案来制造磁性材料，将增加国家在创新过程和量子科学领域的研究实力。这项工作将继续使加拿大成为这些领域的国际领导者。