Preparation of Volatile Heterometallic Precursors for the Synthesis of Mixed-Metal Oxides, Oxyfluorides, Fluorides, and Silicates with Multiferroic Properties

在这个由化学系化学合成计划资助的项目中，奥尔巴尼大学化学系的Dikarev教授将广泛探索异金属α-二酮酸盐作为合成混合金属材料的单一来源的前体。目标是将重金属(Ba、锡、铅、铋、稀土)与3D过渡金属(Ti/Ni)的特定组合，从而产生具有有价值的多铁性的材料。这项工作将集中在可用于MOCVD薄膜制备、固体载体上沉积、单晶生长和纳米颗粒形成的挥发性单源前体。它将证明，异金属双酮酸盐是通用的前体，可用于制备多种多铁材料：氧化物、氧氟化物、氟化物和硅酸盐。更广泛的影响包括加强研究生和本科生的教育和研究经验，以及参与大学范围和社区的倡议，例如继续发展法医化学课程。这项工作将导致更有效地制备一类新的多功能材料，称为多铁性。该方法的成功开发将对材料化学中需要合成混合金属化合物的其他领域产生影响，如高温超导体、充电电池电极和化学传感器。此外，该项目将为学生提供极好的培训，从预科到研究生，包括那些在科学界历来代表性不足的学生。

In this project funded by the Chemical Synthesis Program of the Chemistry Division, Professor Dikarev of the Department of Chemistry at University at Albany will broadly explore heterometallic alpha-diketonates as single-source precursors for the synthesis of mixed-metal materials. Specific combinations of heavy metals (Ba, Sn, Pb, Bi, RE) with 3d transition metals (Ti/Ni) that result in materials with valuable multiferroic properties will be targeted. This work will focus on volatile single-source precursors that can be used in MOCVD preparation of thin films, deposition on solid support, growth of single crystals, and formation of nanoparticles. It will be demonstrated that heterometallic diketonates are universal precursors that can be explored for the preparation of a wide array of multiferroic materials: oxides, oxyfluorides, fluorides, and silicates. The broader impacts involve an enhancement of the educational and research experiences of graduate and undergraduate students and participation in university wide and community initiatives, such as continuing development of forensic chemistry program. This work will lead to more efficient preparation of new class of multifunctional materials called multiferroics. Successful development of the methodology will have an impact on other areas of materials chemistry in which the synthesis of mixed-metal compounds is needed, such as high-temperature superconductors, rechargeable battery electrodes, and chemical sensors. In addition, this project will provide excellent training of students, from pre-undergraduate to graduate, including those from groups historically underrepresented in the sciences.