Solvent-Dependent Bending Ability of Salen-Derived Organic Crystals.,ChemPlusChem

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Solvent-Dependent Bending Ability of Salen-Derived Organic Crystals.
ChemPlusChem ( IF 3.0 ) Pub Date : 2020-05-22 , DOI: 10.1002/cplu.202000362
Sotaro Kusumoto ₁ , Akira Saso ₂ , Hitomi Ohmagari ₂ , Miki Hasegawa ₂ , Yang Kim ₁ , Masaaki Nakamura ₁ , Leonard F Lindoy ₃ , Shinya Hayami _{1,

4}

Affiliation

The formation of plastic or brittle organic crystals of salen derivatives that depend on the solvents employed for crystallization is demonstrated. Large yellow crystals (ranging from mm to cm size) of ten different salen derivatives were obtained and investigated. Among them, (bis(2‐hydroxyacetophenone)ethylenediimine) 2 , which was recrystallized from dichloromethane, tetrahydrofuran or chloroform, exhibited plastic deformation behaviour when mechanical force was applied to the (001) face. In contrast, when 2 was recrystallized from benzene, brittle crystals were obtained. Face indexing confirmed that different crystal faces were obtained by depending on the solvent employed for recrystallization, which leads to either flexible (plastic) or brittle crystals. Photoluminescence with a band maximum at 510 nm and thermochromism related to tautomerism between OH and NH forms were also investigated, and indicate that 2 is a flexible organic single‐crystal material with multifunctional properties.

中文翻译：

Salen衍生的有机晶体的溶剂依赖性弯曲能力。

证明了取决于结晶所使用的溶剂的salen衍生物的塑料或脆性有机晶体的形成。获得并研究了十种不同的Salen衍生物的大黄色晶体（毫米至厘米大小）。其中（bis（2-羟基苯乙酮）乙二亚胺）2从二氯甲烷，四氢呋喃或氯仿中重结晶，在对（001）面施加机械力时表现出塑性变形行为。相反，当2用苯重结晶，得到脆性晶体。面索引证实，取决于用于重结晶的溶剂，可获得不同的晶面，从而导致柔性（塑性）或脆性晶体。还研究了最大波长为510 nm的光致发光以及与OH和NH形式之间的互变异构有关的热致变色现象，结果表明2是一种具有多功能特性的柔性有机单晶材料。

更新日期：2020-05-22

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