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Recrystallization and shape control of crystals of the organic dye acid green 27 in a mixed solvent

机译:有机染料酸性绿27在混合溶剂中的重结晶和晶体形状控制

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Recrystallization of the unstructured dye acid green 27 (AG27) in a mixed solvent of alcohol (ethanol or methanol) and water was systematically studied. The results demonstrated that AG27 crystals with uniform sizes and controllable shapes can be produced by simply changing the volume ratio of ethanol (or methanol) and deionized water (DIW). Rodlike and shuttlelike AG27 crystals can be selectively synthesized. The XRD analyses revealed the periodic structures of the organic crystals. Furthermore, crystallization in another mixed solvent of N,N-dimethylformamide (DMF) and DIW results in the formation of longer fibers with high aspect ratio, which further validates the remarkable effects of mixed solvent on the shape of the AG27 crystals. This method of recrystallization in a mixed solvent is expected to facilitate the synthesis of other functional organic crystals with unusual shapes.
机译:系统地研究了非结构化染料酸性绿27(AG27)在乙醇(乙醇或甲醇)和水的混合溶剂中的重结晶。结果表明,只需改变乙醇(或甲醇)和去离子水(DIW)的体积比,即可生产出尺寸均匀且形状可控的AG27晶体。棒状和穿梭状AG27晶体可以选择性合成。 XRD分析揭示了有机晶体的周期性结构。此外,在N,N-二甲基甲酰胺(DMF)和DIW的另一种混合溶剂中结晶导致形成具有高长径比的较长纤维,这进一步证实了混合溶剂对AG27晶体形状的显着影响。这种在混合溶剂中重结晶的方法有望促进其他形状异常的功能性有机晶体的合成。

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