Acquisition and Upgrade of X-ray Diffractometers at the University of Maryland

马里兰大学 X 射线衍射仪的购置和升级

• 批准号: 9871314
• 负责人: Bruce Jarvis
• 金额: $ 26.53万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-01 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9871314&HistoricalAwards=false
• 关键词: Acquisition; Upgrade; ray; Diffractometers; University

This award from the Chemistry Research Instrumentation and Facilities (CRIF) Program and the Major Research Instrumentation (MRI) Program will enable the Departments of Chemistry and Biochemistry, Physics and Materials Engineering at The University of Maryland in College Park to acquire a CCD single crystal X-ray diffraction system, a powder X-ray diffraction system with variable temperature stage, and to upgrade an existing diffractometer. This equipment will enhance research in a number of areas including the following: (1) synthesis, structures and properties of solid state sulfides, selenides and oxysulfides, (2) insertion studies of transition metals into p-block polyanions, (3) studies of `colossal` magnetoresistance in doped rare-earth manganese perovskites, (4) studies of metal-thiometalate cooperativity in the transport of hazardous metals in anoxic ground waters, (5) self-assembled ionophores, and (6) organometallic chemistry and synthetic methods. The X-ray diffractometer is used to make accurate and precise measurements of the full three dimensional structure of a molecule. The information obtained gives the precise values of all the bond distances and bond angles of a given molecule and it gives accurate information about the spatial arrangement of the molecule relative to the neighboring molecules.

该奖项由化学研究仪器和设施 （CRIF）计划和主要研究仪器（MRI）计划将 使化学和生物化学，物理和 位于学院公园的马里兰州大学材料工程系， 采集CCD单晶X射线衍射系统、粉末X射线衍射仪、 衍射系统与变温阶段，并升级， 现有的衍射仪。 该设备将加强研究， （1）合成、结构和 固态硫化物、硒化物和硫氧化物的性质，（2） 过渡金属在p-区聚阴离子中的插入研究（3） 掺杂稀土锰的巨磁电阻效应研究 （4）金属-硫代硫酸盐协同效应的研究 缺氧地下沃茨水中有害金属的迁移，（5）自组装 离子载体;（6）有机金属化学和合成方法。 采用X射线衍射仪进行精密度和准确度测定， 分子的完整三维结构的测量。的 获得的信息给出了所有键距的精确值 和键角的关系，它能给出精确的信息 关于分子相对于相邻分子的空间排列 分子。