Speciation of technetium-99 incorporated into metal oxide matrices

金属氧化物基质中 Technetium-99 的形态

• 批准号: 0750118
• 负责人: Lynn Francesconi
• 金额: $ 44万
• 依托单位: CUNY Hunter College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-06-01 至 2013-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0750118&HistoricalAwards=false
• 关键词: Speciation; technetium; 99; incorporated; into

This award supports Professor Lynn C. Francesconi at CUNY Hunter College to determine the chemical bonding, redox chemistry, and speciation of technetium in metal-oxide materials. Polyoxometalates (POMs) will serve as models for solid-state materials to garner critical information concerning the chemical and redox stability and speciation of 99Tc in metal oxide hosts. The specific objectives are: 1) An examination of the impact of the steric and electronic differences of the 1- and 2- Wells-Dawson POM isomers on the binding strength and redox properties of technetium. 2) A determination of the stability of a technetium-POM materials as a function of the steric and electronic features of the polyoxometalate combined with specific low valent technetium cores. 3) Development of a new approach for the reduction of pertechnetate and stabilization of the generated low valent Tc. This strategy employs tunable reduced POMs to transfer electrons to pertechnetate and stabilize the reduced Tc. A broader impact of this project will be the training of postdocs and graduate students in radiochemistry and in the handling of radioactive materials. The research will also draw on the large pool of minority students in the sciences at Hunter and CUNY to bring diversity into the pool of radiochemists. The training component of this project is enhanced through collaborations with the University of Nevada-Las Vegas and Lawrence Berkeley National Laboratory.

这个奖项支持教授林恩C。Francesconi在CUNY Hunter College研究了金属氧化物材料中锝的化学键、氧化还原化学和形态。聚氧酸盐（POM）将作为固态材料的模型，以获得有关金属氧化物基质中99 Tc的化学和氧化还原稳定性和形态的关键信息。具体目标是：1）检查1-和2- Wells-Dawson POM异构体的空间和电子差异对锝的结合强度和氧化还原性质的影响。2)锝-POM材料的稳定性作为与特定低价锝核结合的聚氧乙烯酸盐的空间和电子特征的函数的测定。 3)开发一种新的方法，用于减少高锝酸盐和稳定所产生的低价Tc。该策略采用可调还原POM将电子转移到高锝酸盐并稳定还原Tc。该项目的一个更广泛的影响将是培训放射化学和放射性材料处理方面的博士后和研究生。这项研究还将利用亨特和纽约市立大学的大量少数民族学生，为放射化学家带来多样性。通过与内华达大学拉斯维加斯分校和劳伦斯伯克利国家实验室合作，加强了该项目的培训部分。