From Unstable Precursors to Metastable Nitrides: Azidothermal Synthesis of Binaries and Beyond

从不稳定前驱体到亚稳态氮化物：二元化合物及其他物质的叠氮热合成

• 批准号: 0407753
• 负责人: Edward Gillan
• 金额: $ 35.5万
• 依托单位: University of Iowa
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-07-01 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0407753&HistoricalAwards=false
• 关键词: Unstable; Precursors; Metastable; Nitrides; Azidothermal

This award in the Inorganic, Bioinorganic and Organometallic Chemistry program supports Professor Edward Gillan at the University of Iowa to explore large scale, facile, and reproducible synthetic methodologies towards metal nitride and pnictide systems. The chemistry of metal azide to nitride (azidothermal) conversion reactions will be investigated. Because of the energetic nature of the azide ligand, moderate decomposition temperatures allowing access to metastable materials are expected. Through careful adjustments in the non-aqueous solvent, this method is expected to produce discrete nanostructured products that have interesting optical and magnetic properties. Nanoparticles and nanocrystallites of bulk inorganic solids exhibit size dependent properties, such as lower melting points, higher energy gaps, and non-thermodynamic structures that are distinct from bulk materials. This research aims to access stable nitride structures with controlled structural, optical, and magnetic properties through viable and reproducible low-temperature chemical syntheses. Specifically, the chemistry of metal azides will be developed for the low-temperature synthesis of nitrides. Graduate students, undergraduate students and postdoctoral associates will receive training in synthetic materials methodology and in determining the physical properties of microscale and nanoscale nitride materials.

无机，生物无机和有机化学计划的这一奖项支持爱荷华州大学的Edward Gillan教授探索大规模，简便和可重复的金属氮化物和磷属元素化物系统的合成方法。将研究金属叠氮化物到氮化物（叠氮热）转化反应的化学。由于叠氮化物配体的能量性质，预期允许获得亚稳材料的中等分解温度。 通过在非水溶剂中的仔细调整，该方法有望产生具有有趣的光学和磁性的离散纳米结构产品。 块状无机固体的纳米颗粒和纳米粘土表现出尺寸依赖性性质，例如较低的熔点、较高的能隙和不同于块状材料的非热力学结构。 这项研究的目的是通过可行的和可重复的低温化学合成获得稳定的氮化物结构，具有可控的结构，光学和磁性。具体来说，金属叠氮化物的化学将被开发用于氮化物的低温合成。 研究生、本科生和博士后将接受合成材料方法学和确定微米级和纳米级氮化物材料物理特性的培训。