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  • 1
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1434-4475
    Keywords: Optical activity ; Circular dichroism ; Sodium thioantimonate nonahydrate ; Suspension measurements ; Isotropic compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Wir konnten zeigen, daß Messungen des optischen Circulardichroismus an in flüssigem Medium suspendierten Pulvern durchgeführt werden können. Die Brechungsindizes von Pulver und suspendierender Flüssigkeit müssen aneinander angepaßt werden; das Suspensionsmittel darf nicht wesentlich mit dem zu messenden Feststoff in Wechselwirkung treten und darf im Meßbereich nicht absorbieren. Durch Verreiben von laevo- und dextrorotatorischen Kristallen erhaltene Natriumthioantimonatnonahydratpulver (Na3SbS4·9H2O) erwiesen sich als ausgezeichnete Beispiele zur Demonstration der Methode. Messungen der optischen Drehung von laevo- und dextrorotatorischen Kristallen und Pulvern von Na3Sb4·9H2O wurden ebenfalls durchgeführt und trugen zur Charakterisierung des Salzes bei. Im Verlauf der Entwicklung der Meßtechnik wurden auch CD-Spektren von NaClO3- und NaBrO3-Kristallen aufgenommen.
    Notes: Summary We have demonstrated that optical circular dichroism (CD) measurements can be carried out on powders suspended in a liquid medium. The refractive indices of the powder and the suspending liquid must be matched, the suspending liquid must not interact significantly with the solid to be measured and must not absorb in the region where the measurements are carried out. Sodium thioantimonate nonahydrate (Na3SbS4·9H2O) powders obtained by grinding oflevo- ordextro-rotatory crystals were found to be excellent examples for the demonstration of this technique. Measurements of the optical rotation forlevo- anddextro-rotatory crystals and powders of Na3SbS4·9H2O were also carried out and provided additional characterization of this salt. In the course of developing the CD measurement technique, CD of NaClO3 and NaBrO3 crystals was also measured.
    Type of Medium: Electronic Resource
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