Summary
The preparation and spectroscopic properties of the aggregated forms of chlorophylls a and b (Chl-a and Chl-b) in methanol, dioxane and/or water were studied. In methanol-dioxane-water solutions, pure Chl-a and Chl-b formed aggregates (colloidal chlorophylldioxane adducts) absorbing at 685 nm and 672 nm; (Ca685 and Cb672, respectively). Similar species of Ca685 and Cb672 were obtained when crude methanol extracts of chlorophylls from plant materials were mixed with dioxane and water. The acicular microcrystalline precipitates as a result of co-aggregation of the species Ca685 and Cb672 were observed. The schematic diagrams of transformation among various aggregated forms of Chl-a and Chl-b in methanol, dioxane and/or water were presented and discussed.
Zusammenfassung
Darstellung und spektroskopische Eigenschaften der aggregierten Formen von Chlorophyll a und b (Chl-a und Chl-b) in Methanol, Dioxan und/oder Wasser wurden untersucht. In Methanol-Dioxan-Wasser-Lösungen bilden reines Chl-a sowieChl-b Aggregate (Chlorophyll-Dioxan Addukte), die bei 685 nm sowie 672 nm absorbieren. Ähnliche Spezies wurden erhalten, wenn die methanolischen Extrakte des Chlorophylls aus den Pflanzen-Materialien mit Dioxan und Wasser gemischt wurden. Schematische Diagramme über die Umwandlung zwischen den aggregierten Formen von Chl-a und Chl-b in Methanol, Dioxan und/oder Wasser wurden diskutiert.
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Iriyama, K., Yoshiura, M. Absorption spectroscopy of chlorophylls a and b in methanol, dioxane and/or water. Colloid & Polymer Sci 255, 133–139 (1977). https://doi.org/10.1007/BF01777272
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DOI: https://doi.org/10.1007/BF01777272