Rhythmic crystallization of ascorbic acid precipitated from its methanol solutions

Iwamoto, Kazutoshi; Mitomo, Shun-ichi; Senō, Manabu

doi:10.1016/0021-9797(84)90250-9

Cited by 18 publications

(15 citation statements)

References 8 publications

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“…The first possibility is realized in banded polycrystalline aggregates of PD (Figure 2, Figure 3) and phthalic acid [7][8][9] as well as in aggregates of ascorbic acid grown by rapid solvent evaporation. [149][150][151][152] Periodic nucleation/termination events can arise even if enough material and high driving forces are available at the growth front. Fibers that deviate from the radius interfere with one another providing nucleation of the next fiber generation.…”

Section: Discussionmentioning

confidence: 99%

Bernauer′s Bands

et al. 2011

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Ferdinand Bernauer proposed in his monograph, "Gedrillte" Kristalle (1929), that a great number of simple, crystalline substances grow from solution or from the melt as polycrystalline spherulites with helically twisting radii that give rise to distinct bull's-eye patterns of concentric optical bands between crossed polarizers. The idea that many common molecular crystals can be induced to grow as mesoscale helices is a remarkable proposition poorly grounded in theories of polycrystalline pattern formation. Recent reinvestigation of one of the systems Bernauer described revealed that rhythmic precipitation in the absence of helical twisting accounted for modulated optical properties [Gunn, E. et al. J. Am. Chem. Soc. 2006, 128, 14234-14235]. Herein, the Bernauer hypothesis is re-examined in detail for three substances described in "Gedrillte" Kristalle, potassium dichromate, hippuric acid, and tetraphenyl lead, using contemporary methods of analysis not available to Bernauer, including micro-focus X-ray diffraction, electron microscopy, and Mueller matrix imaging polarimetry. Potassium dichromate is shown to fall in the class of rhythmic precipitates of undistorted crystallites, while hippuric acid spherulites are well described as helical fibrils. Tetraphenyl lead spherulites grow by twisting and rhythmic precipitation. The behavior of tetraphenyl lead is likely typical of many substances in "Gedrillte" Kristalle. Rhythmic precipitation and helical twisting often coexist, complicating optical analyses and presenting Bernauer with difficulties in the characterization and classification of the objects of his interest.

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Section: Discussionmentioning

confidence: 99%

Bernauer′s Bands

et al. 2011

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“…Oxalsäure-Dihydrat-Kristalle aus Essigsäure. [255] [6,99,137,141,163,[261][262][263][264][265] Die Ursache der Bänderung kann durch direkten Nachweis von verwundenen Formen mit Mikrostrukturanalysemethoden wie AFM und SEM beurteilt werden (Abbildung 2). Wenn keine direkte Beobachtung mçglich ist, kann die Richtung der Faserverwindung durch das Wallerantsche Verfahren des "Schraubenabtastung"…”

Section: Methodsunclassified

Wachstumsinduziertes Biegen und Verwinden von Einkristallen

et al. 2014

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Kristalle von verschiedenen Stoffen, z. B. von Elementen, Mineralien, einfachen Salzen, organischen Molekülkristallen und hochmolekularen Polymeren, können die Translationsfernordnung aufgeben, indem sie sich während des Wachstums verwinden und verbiegen. Diese Erscheinungen wurden bei Kristallen im Größenbereich von Nano‐ bis Zentimetern beobachtet. Wir analysieren, wie und warum viele Materialien solche oft drastischen nichtkristallographischen Verzerrungen wählen und betonen dabei die Kristallchemie, die zu Spannungen an Oberflächen von Kristalliten oder innerhalb des Volumens führt.

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“…17) In their experiment, the methanol solvent was evaporated at 276, 280, 293 K in a refrigerator. They reported that the methanol evaporation at 293 K produces only homegeneously precipitated L-ascorbic acid on the glass surface and that the methanol evaporation at 276 and 280 K produces concentric rings.…”

Section: Introductionmentioning

confidence: 99%

Morphological Diversity in Crystal Growth ofL-Ascorbic Acid Dissolved in Methanol

et al. 2003

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Morphological diagram with respect to crystal growth of L-ascorbic acid (C 6 H 8 O 6 ; so-called vitamin C) from methanol solution on a flat glass dish is presented. Varying humidity and initial concentration of L-ascorbic acid in methanol solution, the following three distinct kinds of growing patterns have been observed: homogeneous disk, concentric ring and dendrite. In addition, in higher concentration clearly faceted small single crystals grow in any humidity less than 90%. Crossovers from one pattern to another were observed, too.

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Rhythmic crystallization of ascorbic acid precipitated from its methanol solutions

Cited by 18 publications

References 8 publications

Bernauer′s Bands

Bernauer′s Bands

Wachstumsinduziertes Biegen und Verwinden von Einkristallen

Morphological Diversity in Crystal Growth ofL-Ascorbic Acid Dissolved in Methanol

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