结晶
分析物
材料科学
溶剂
分子
惰性
化学
纳米技术
有机分子
有机化学
色谱法
作者
Andrew R. Tyler,Ronnie Ragbirsingh,Charles J. McMonagle,Paul G. Waddell,Sarah E. Heaps,Jonathan W. Steed,Paul Thaw,Michael J. Hall,Michael R. Probert
出处
期刊:Chem
[Elsevier]
日期:2020-07-01
卷期号:6 (7): 1755-1765
被引量:100
标识
DOI:10.1016/j.chempr.2020.04.009
摘要
Single-crystal X-ray diffraction analysis (SCXRD) constitutes a universal approach for the elucidation of molecular structure and the study of crystalline forms. However, the discovery of viable crystallization conditions remains both experimentally challenging and resource intensive in both time and the quantity of analyte(s). We report a robot-assisted, high-throughput method for the crystallization of organic-soluble small molecules in which we employ only micrograms of analyte per experiment. This allows hundreds of crystallization conditions to be screened in parallel with minimal overall sample requirements. Crystals suitable for SCXRD are grown from nanoliter droplets of a solution of analyte in organic solvent(s), each of which is encapsulated within an inert oil to control the rate of solvent loss. This encapsulated nanodroplet crystallization methodology can also be used to search for new crystal forms, as exemplified through both our discovery of a new (13th) polymorph of the olanzapine precursor ROY and SCXRD analysis of the "uncrystallizable" agrochemical dithianon.
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