Measurement of Circular Birefringence and Circular Dichroism of the Single Crystals of Γ-(+)589- and Δ-(-) 589-Tris(ethylenediamine)cobalt(III) Triiodide Monohydrate by the Extended HAUP Method

Ryo Matsuki, Toru Asahi, Jinzo Kobayashi, Hiroshi Asai

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    We have achieved measuring four optical parameters simultaneously, namely, linear birefringence (LB), circular birefringence (CB), linear dichroism (LD), and circular dichroism (CD), of single crystals of Γ-(+)589- and Δ-(-)589-tris(ethylenediamine) cobalt(III) triiodide monohydrate (1) along the 〈001〉 plane at the fixed wavelength (514.5 nm). Such measurements are possible only when the High Accuracy Universal Polarimeter (HAUP) is employed; it is called the extended HAUP method. Our experimental results showed that both LB and LD of the Γ-(+) 589-(1) crystal have the same magnitude as those of the Δ-(-)589-(1) crystal. It was also revealed for the first time that the CB data of crystals of Γ-(+)589-(1) and Δ-(-)589-(1) are almost of the same magnitude, but are of opposite sign, reflecting their opposite absolute configurations. On the other hand, although the CD data obtained for Γ-(+)589-(1) is almost three times larger than that for Δ-(-)589-(1), these CD data are also opposite in sign, as expected from the opposite chirality of crystals.

    Original languageEnglish
    Pages (from-to)286-293
    Number of pages8
    JournalChirality
    Volume16
    Issue number5
    DOIs
    Publication statusPublished - 2004

    Fingerprint

    Birefringence
    Polarimeters
    Dichroism
    Circular Dichroism
    Cobalt
    Single crystals
    Crystals
    Chirality
    tris(ethylenediamine)cobalt(III)
    Wavelength

    Keywords

    • Chiral metal complex
    • Chiral single crystals
    • Chirality
    • Circular dichroism
    • Optical rotation

    ASJC Scopus subject areas

    • Analytical Chemistry
    • Drug Discovery
    • Organic Chemistry
    • Pharmacology

    Cite this

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    title = "Measurement of Circular Birefringence and Circular Dichroism of the Single Crystals of Γ-(+)589- and Δ-(-) 589-Tris(ethylenediamine)cobalt(III) Triiodide Monohydrate by the Extended HAUP Method",
    abstract = "We have achieved measuring four optical parameters simultaneously, namely, linear birefringence (LB), circular birefringence (CB), linear dichroism (LD), and circular dichroism (CD), of single crystals of Γ-(+)589- and Δ-(-)589-tris(ethylenediamine) cobalt(III) triiodide monohydrate (1) along the 〈001〉 plane at the fixed wavelength (514.5 nm). Such measurements are possible only when the High Accuracy Universal Polarimeter (HAUP) is employed; it is called the extended HAUP method. Our experimental results showed that both LB and LD of the Γ-(+) 589-(1) crystal have the same magnitude as those of the Δ-(-)589-(1) crystal. It was also revealed for the first time that the CB data of crystals of Γ-(+)589-(1) and Δ-(-)589-(1) are almost of the same magnitude, but are of opposite sign, reflecting their opposite absolute configurations. On the other hand, although the CD data obtained for Γ-(+)589-(1) is almost three times larger than that for Δ-(-)589-(1), these CD data are also opposite in sign, as expected from the opposite chirality of crystals.",
    keywords = "Chiral metal complex, Chiral single crystals, Chirality, Circular dichroism, Optical rotation",
    author = "Ryo Matsuki and Toru Asahi and Jinzo Kobayashi and Hiroshi Asai",
    year = "2004",
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    language = "English",
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    T1 - Measurement of Circular Birefringence and Circular Dichroism of the Single Crystals of Γ-(+)589- and Δ-(-) 589-Tris(ethylenediamine)cobalt(III) Triiodide Monohydrate by the Extended HAUP Method

    AU - Matsuki, Ryo

    AU - Asahi, Toru

    AU - Kobayashi, Jinzo

    AU - Asai, Hiroshi

    PY - 2004

    Y1 - 2004

    N2 - We have achieved measuring four optical parameters simultaneously, namely, linear birefringence (LB), circular birefringence (CB), linear dichroism (LD), and circular dichroism (CD), of single crystals of Γ-(+)589- and Δ-(-)589-tris(ethylenediamine) cobalt(III) triiodide monohydrate (1) along the 〈001〉 plane at the fixed wavelength (514.5 nm). Such measurements are possible only when the High Accuracy Universal Polarimeter (HAUP) is employed; it is called the extended HAUP method. Our experimental results showed that both LB and LD of the Γ-(+) 589-(1) crystal have the same magnitude as those of the Δ-(-)589-(1) crystal. It was also revealed for the first time that the CB data of crystals of Γ-(+)589-(1) and Δ-(-)589-(1) are almost of the same magnitude, but are of opposite sign, reflecting their opposite absolute configurations. On the other hand, although the CD data obtained for Γ-(+)589-(1) is almost three times larger than that for Δ-(-)589-(1), these CD data are also opposite in sign, as expected from the opposite chirality of crystals.

    AB - We have achieved measuring four optical parameters simultaneously, namely, linear birefringence (LB), circular birefringence (CB), linear dichroism (LD), and circular dichroism (CD), of single crystals of Γ-(+)589- and Δ-(-)589-tris(ethylenediamine) cobalt(III) triiodide monohydrate (1) along the 〈001〉 plane at the fixed wavelength (514.5 nm). Such measurements are possible only when the High Accuracy Universal Polarimeter (HAUP) is employed; it is called the extended HAUP method. Our experimental results showed that both LB and LD of the Γ-(+) 589-(1) crystal have the same magnitude as those of the Δ-(-)589-(1) crystal. It was also revealed for the first time that the CB data of crystals of Γ-(+)589-(1) and Δ-(-)589-(1) are almost of the same magnitude, but are of opposite sign, reflecting their opposite absolute configurations. On the other hand, although the CD data obtained for Γ-(+)589-(1) is almost three times larger than that for Δ-(-)589-(1), these CD data are also opposite in sign, as expected from the opposite chirality of crystals.

    KW - Chiral metal complex

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    KW - Circular dichroism

    KW - Optical rotation

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