| 2 | Author
| Ralf Steudel, Thomas Göbel, Gabriele Holdt | Requires cookie* | | Title
| The Molecular Composition of Hydrophilic Sulfur Sols Prepared by Acid Decomposition of Thiosulfate [1]  | | | Abstract
| Hydrophilic sulfur sols prepared from sodium thiosulfate and concentrated sulfuric acid and purified by repeated NaCl precipitation and peptization in water have been studied by chemical analysis, vibrational spectroscopy, ion-pair chromatography and reversed-phase HPLC. The composition of the sol is Na 164 S 28 . 6 0 6 • 5.9In S" • 1.0 NaCl. The elemental sulfur S" (n = 6-14; mainly S 8) accounts for 17% the total sulfur; 83% of the S are present as long-chain polythionates which form micelles in which the S" molecules are dissolved. On aging of the sol at 20 °C the polythionate micelles decompose to give water-soluble short-chain polythionates and elemental sulfur which precipitates from the solution. The micelle structure of hydrophilic sulfur sols may serve as a model for the so-called sulfur globules (S°) formed intra-or extracellularly by many sulfur bacteria which oxidize reduced sulfur compounds to S°. — Infrared and Raman spectra of K 2 S m 0 6 (m = 3—6) are reported. The photodecomposition of aqueous tetrathionate yields sulfite, thiosulfate, and polythionates with up to 9 sulfur atoms. | | |
Reference
| Z. Naturforsch. 43b, 203—218 (1988); received August 3 1987 | | |
Published
| 1988 | | |
Keywords
| Sulfur Sol, Polythionates, Elemental Sulfur, Thiosulfate Decomposition, Sulfur Bacteria | | |
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| default:Reihe_B/43/ZNB-1988-43b-0203.pdf | | | Identifier
| ZNB-1988-43b-0203 | | | Volume
| 43 | |
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