Tailor-Made Auxiliaries for Polar Growth from Melts,Israel Journal of Chemistry

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Tailor-Made Auxiliaries for Polar Growth from Melts
Israel Journal of Chemistry ( IF 2.3 ) Pub Date : 2021-09-03 , DOI: 10.1002/ijch.202100048
Bart Kahr ₁ , Alexander G. Shtukenberg ₁ , Jingxiang Yang _{1,

2} , Michael D. Ward ₁

Affiliation

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 the β form of resorcinol and another for form I of L-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.

中文翻译：

为熔化极地生长量身定制的助剂

与从溶液中生长的晶体相比，量身定制的助剂通常对从熔体中生长的晶体的立体化学区分度较低。然而，可以按照 Lahav 和 Leiserowitz 教给我们的方式，使用精心挑选的添加剂进行超分子推断。在高结晶驱动力下，沿一个主要结晶方向从过冷熔体中频繁生长出呈针状生长和小角度分支的球晶。如果这个方向是极性的，重要的是建立它的绝对意义，作为理解晶体和熔体之间界面处生长的基础。对于多晶系综，这种分配超出了 X 射线晶体学的能力。用特制的添加剂描述了这种区分的两个例子，一个用于β形式的间苯二酚和另一种形式的L-苹果酸。用分子添加剂分配极轴的绝对意义是一个类似于魏茨曼研究所先前实验的科学和风格的问题。

更新日期：2021-10-25

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