single crystal diffractometer

要求获得一台X射线衍射仪，它具有微焦点双源(铜和钼)、温度控制单元(在400K和100K之间无级)和最先进的探测器(读出时间短，探测器面积足够大，动态范围大，对两种类型的辐射都有高的量子效率)，用于单晶分析。衍射仪将用于固体化学和材料科学领域(无机化学、物理化学系)和所有分子化学领域(无机化学、有机化学、生物化学、化学生物学、分析化学系)的单晶化合物的分析。这包括围绕下列主题的研究：一)含重原子和不含重原子的化合物二)绝对构型的测定三)相变四)温度敏感化合物五)在测量条件下具有有限寿命的反应物种六)化合物固有地显示出结晶学无序问题的化合物七)具有复杂的结晶学孪晶问题的化合物所要求的衍射仪将取代化学系现有的衍射仪，该衍射仪将于2023年11月达到计划使用寿命的结束(它于2008年投入使用)。此外，在相同的时间跨度内，将有可能进行更多数量的“标准单晶X射线分析”，并且将有可能以可接受的测量时间公布关于没有重原子的小单晶的数据集。

The acquisition of an X-ray diffractometer with a microfocus dual source (copper and molybdenum), a temperature control unit (stepless between 400 K and 100 K), and a detector at the state of the art (short read-out time, sufficiently large detector area, large dynamic range, and high quantum efficiency for both types of radiation) for the analysis of single-crystals is requested. The diffractometer will be used for the analysis of single-crystalline compounds from the fields of solid state chemistry and materials science (departments of inorganic chemistry, physical chemistry) and from all fields of molecular chemistry (departments of inorganic chemistry, organic chemistry, biochemistry, chemical biology, analytical chemistry). This includes research centered around the following topics: i) compounds with and without heavy atoms ii) determination of the absolute configuration iii) phase transitions iv) temperature-sensitive compounds v) reactive species with restricted life-times under the conditions of the measurement vi) compounds that inherently show problems of crystallographic disorder vii) compounds with complex problems of crystallographic twinning The requested diffractometer will replace an existing diffractometer at the department of chemistry, which will reach the end of its planned lifetime in November 2023 (it was put in operation in 2008). Furthermore, a significantly larger number of "standard single-crystal X-ray analyses" will be possible in the same time span and publishable data sets on small single-crystals without heavy atoms will be possible with acceptable measurement times.