Tailor‐Made Auxiliaries for Polar Growth from Melts
Tailor‐Made Auxiliaries for Polar Growth from Melts
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DOI：
10.1002/ijch.202100048
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发表时间：
2021-09
影响因子：
3.2
通讯作者：
B. Kahr;A. Shtukenberg;Jingxiang Yang;M. D. Ward
中科院分区：
文献类型：
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作者：
B. Kahr;A. Shtukenberg;Jingxiang Yang;M. D. Ward
定制的助剂通常对从熔体生长的晶体的立体化学区分度低于从溶液生长的晶体。然而，使用Lahav和Leiserowitz教授给我们的方法，使用精心选择的添加剂进行超分子推断是可能的。表现出针状生长和小角度分支的球晶经常在高结晶驱动力下从过冷熔体中沿着一个主结晶方向生长。如果这个方向是极性的，那么建立它的绝对意义作为理解晶体和熔体之间界面生长的基础是很重要的。对于多晶系综来说，这种分配超出了X射线晶体学的能力。这种区分的两个例子描述了定制的添加剂，一个是β型间苯二酚，另一个是I型L-苹果酸。在分子添加剂的情况下，极轴的绝对意义是一个类似于魏茨曼研究所以前实验的科学和风格的问题。
Tailor‐made auxiliaries are generally less stereochemically discriminating of crystals grown from the melt than crystals grown from solution. However, it is possible to make supramolecular inferences using well‐chosen additives in the manner taught to us by Lahav and Leiserowitz. Spherulites manifesting needle‐like growth and small angle branching grow frequently from supercooled melts under high crystallization driving forces, along one principal crystallographic direction. If this direction is polar, it is important to establish its absolute sense as a basis for understanding growth at the interface between crystals and melt. This assignment, for polycrystalline ensembles, is beyond the capabilities of X‐ray crystallography. Two examples of this discrimination are described with tailor‐made additives, one for theβform of resorcinol and another for form I ofL‐malic acid. Assigning the absolute sense of a polar axis with molecular additives is a problem that resembles both the science and style of previous experiments from the Weizmann Institute.