UTILITY TO DEVELOP SINGLE CRYSTAL W BAND EPR SPECTROMETRY AMETHYST

开发单晶 W 波段 EPR 光谱法紫水晶的实用性

• 批准号: 6120675
• 负责人: John A Weil
• 金额: $ 0.54万
• 依托单位: UNIVERSITY OF ILLINOIS AT CHICAGO
• 依托单位国家: 美国
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-04-15 至 1999-11-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6120675
• 关键词: biomedical resource; computers; technology /technique

Project to study iron ions in amethyst single crystals, especially to detect/discover Fe(2+) and Fe(4+) resonances. 1) Line position angle roadmaps for 94.1 GHz EPR spectra were produced for all known Fe(3+) centres in -quartz, using 9.5 GHz previously measured spectra. These are serving as guidelines essential for the W-band work. 2) Major successful development work (months) was done to (learn to) produce 0.7mm diameter cylinders of carefully oriented amethyst crystals. 3) Preliminary W-band spectra at room temperature showed presence of several Fe(3+) centres, plus some as-yet unidentified centres. We seek to gain experience on use of W-band spectroscopy to detect and study Fe(4+) and transfer this experience to the characterization of Fe(+4) sites in metalloproteins. This is an ongoing project.

研究紫水晶单晶中铁离子的项目， 尤其是检测/发现Fe(2+)和Fe(4+)的共振。1)行 制作了94.1 GHz EPR谱的位置角路线图 已知的Fe(3+)中心在石英中，使用先前测量的9.5 GHz 光谱。这些都是W波段必不可少的指导方针 工作。2)完成了主要成功的开发工作(月) (学会)生产直径0.7 mm的精密定向圆柱体 紫水晶。3)室温下的初步W波段光谱 显示存在几个Fe(3+)中心，另外还有一些 不明身份的中心。我们寻求获得使用W频带的经验 光谱学检测和研究Fe(4+)并传递这一经验 对金属蛋白中Fe(+4)位的表征。这是 一个正在进行的项目。