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Understanding exceptional polymorphs

机译:了解特殊的多态

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In an engaging and thoughtful article in this issue Carol Brock (Brock, 2016) of the University of Kentucky puts forward a typically insightful, modestly understated and detailed analysis of some of the organizing principles behind crystal structures with high Z0. Did I lose your interest already? It sounds obscure doesn't it? Some crystallographic parameter . . . a few odd, niche structures. Who cares, right? Wrong! Let me tell you why. Of course you already know what Z0 is; loosely the number of symmetry-independent molecules in the asymmetric unit. As an Acta B reader you also know just how extraordinarily important the organic/molecular solid state is. The understanding and control of solid forms in general is the Holy Grail of structural scientists. Industry, particularly pharma and agrichem, cares enormously about the solid form of molecules. The solid form impinges directly on solubility, bioavailability, processing characteristics, bulk density, dissolution rate, permeability, surface electrostatic charge and so on (Brittain, 1999). It is all true. All that background justification you have been reading in grant applications for so long. Moreover, understanding and even predicting crystal structure is one of the grand fundamental challenges in science. So any step forward in that direction is extremely important.
机译:肯塔基大学的Carol Brock(Brock,2016)在本期的一篇引人入胜且深思熟虑的文章中,对Z0高的晶体结构背后的一些组织原理提出了典型的有见地,轻描淡写和详尽的分析。我已经失去您的兴趣了吗?听起来很晦涩吗?一些晶体学参数。 。 。一些奇怪的利基结构。谁在乎吧?错误!让我来告诉你为什么。当然,您已经知道Z0是什么。不对称单元中不依赖于对称性的分子的数量松散。作为Acta B读者,您还知道有机/分子固态的重要性。通常,对固体形式的理解和控制是结构科学家的圣杯。工业,特别是制药和农业化学,对分子的固体形式极为关注。固体形式直接影响溶解度,生物利用度,加工特性,堆积密度,溶解速率,渗透性,表面静电荷等(Brittain,1999)。没错您已经在补助金申请中阅读了这么长时间的所有背景证明。此外,了解甚至预测晶体结构是科学中的重大基本挑战之一。因此,朝这个方向迈出的任何一步都是极为重要的。

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