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合成,表征和SSZ-58的结构解决方案:一种新的二维10环孔泽оли特,具有以前未见的双重5环子单元
Allen Burton1, Saleh Elomari, Ronald C Medrud
1ChevronTexaco Energy Research and Technology Center, Richmond, California 94802, USA. buaw@chevrontexaco.com
Journal of the American Chemical Society
|February 6, 2003
概括
研究人员用一种新型结构指导剂合成了一种新型热石,SSZ-58. 它的复杂结构是从粉末数据中解决的最复杂的,具有独特的双重五分环和2D通道系统.
科学领域:
- 材料科学 材料科学 材料科学
- 晶体学 晶体学是指结晶学.
- 化学 化学 化学
背景情况:
- 热质石是具有多种工业应用的关键微孔材料.
- 开发具有独特性质的新型热带石结构是一个正在进行的研究领域.
- 从粉末衍射数据来确定结构存在重大挑战.
研究的目的:
- 报告一种新的热带石材料SSZ-58.8的合成,结构溶液和表征.
- 阐明SSZ-58.8的新型框架拓和结构特征.
- 为了确定SSZ-58是迄今为止从粉末数据中解决的最复杂的热带石结构.
主要方法:
- 水热合成使用1--1-循环环氧化酸作为结构指导剂.
- 结构解决方案采用焦点里埃回收方法.
- 通过瑞特维尔德的框架确认,在空间组Pmma.中对同步粉X射线衍射数据的精细化.
主要成果:
- 成功合成和表征了新型焦石SSZ-58.成功的合成和表征.
- 确定一个复杂的框架拓与12个四面体原子在不对称的单位.
- 识别了以前未被观察到的连接原子层的双五环 (D5R).
- 发现了一个二维通道系统,由10个环形毛孔组成,交叉成更大的腔.
结论:
- SSZ-58代表了热岩结构复杂性的重大进步,是从粉末数据中解决的最复杂的.
- SSZ-58独特的D5R子单元和复杂的通道系统为新的催化或分离应用提供了潜力.
- 这项工作扩大了已知热带石结构的库,并提供了对结构-属性关系的见解.
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