Rapid Structure Determination of Microcrystalline Molecular Compounds Using Electron Diffraction.

Rapid Structure Determination of Microcrystalline Molecular Compounds Using Electron Diffraction.
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使用电子衍射的微晶分子化合物的快速结构测定。

DOI:
10.1002/anie.201811318
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发表时间:
2018-12-10
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
通讯作者:
Pantelic R
Pantelic R
中科院分区:
其他
文献类型:
--
作者:
Gruene T;Wennmacher JTC;Zaubitzer C;Holstein JJ;Heidler J;Fecteau-Lefebvre A;De Carlo S;Müller E;Goldie KN;Regeni I;Li T;Santiso-Quinones G;Steinfeld G;Handschin S;van Genderen E;van Bokhoven JA;Clever GH;Pantelic R

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目前,各领域的化学家每年发表约50,000种晶体结构,其中绝大多数是X射线结构。我们通过电子衍射而不是X射线衍射确定了两种分子结构。为此,将EIGER混合像素检测器安装到透射电子显微镜,得到电子衍射仪。在小于1×2 μ m ~ 2的晶体上测定了一种新的亚甲蓝衍生物的结构,分辨率为0.9μ m。 数千种活性药物成分(API)仅以亚微晶粉末的形式提供。为了说明电子晶体学在制药工业中的潜力,我们还从药丸中确定了API的结构。我们证明,电子晶体学补充了X射线晶体学,是所有未解决的情况下,其中亚微米尺寸的晶体是限制因素的选择技术。
Chemists of all fields currently publish about 50 000 crystal structures per year, the vast majority of which are X‐ray structures. We determined two molecular structures by employing electron rather than X‐ray diffraction. For this purpose, an EIGER hybrid pixel detector was fitted to a transmission electron microscope, yielding an electron diffractometer. The structure of a new methylene blue derivative was determined at 0.9 Å resolution from a crystal smaller than 1×2 μm2. Several thousand active pharmaceutical ingredients (APIs) are only available as submicrocrystalline powders. To illustrate the potential of electron crystallography for the pharmaceutical industry, we also determined the structure of an API from its pill. We demonstrate that electron crystallography complements X‐ray crystallography and is the technique of choice for all unsolved cases in which submicrometer‐sized crystals were the limiting factor.
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影响因子: 4.3
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