Effect of Specific Amino Acids on Controlling Crystal Pseudopolymorphism of L-Arginine Hydrochloride

Takeshi Shimizu, Hiromu Yoshiura, Hiroshi Nagano, Izumi Hirasawa

    研究成果: Article

    抄録

    The effect of a small amount of amino acid additives on the pseudopolymorphism of L-arginine hydrochloride (LAHCL) in aqueous solution is reported. Results confirm that L-alanine (L-Ala) has a stabilizing effect on the crystals of the anhydrate form of LAHCL at low temperature. Intriguingly, the stabilizing effect was observed even when L-Ala was added after a large amount of LAHCL had formed. In contrast, no stabilizing effect with D-Ala could be stated, suggesting that the stereochemistry of the additives is an important factor. In addition to the stereochemistry, also the length and bulkiness of the alkyl side-chain of the amino acids were found to be significant factors. Based on these results, a mechanism is proposed for stabilization of anhydrate LAHCL crystals by amino acid additives. Precise control of polymorphs and pseudopolymorphs is important to obtain highly functional crystals in industry. The effect of a defined amount of amino acid additives on the pseudopolymorphism of L-arginine hydrochloride (LAHCL) is evaluated. A very small amount of specific amino acids is sufficient to stabilize the anhydrate form of LAHCL crystals at low temperature.

    元の言語English
    ページ(範囲)1427-1430
    ページ数4
    ジャーナルChemical Engineering and Technology
    37
    発行部数8
    DOI
    出版物ステータスPublished - 2014

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    Arginine
    Amino acids
    Amino Acids
    Crystals
    Stereochemistry
    Polymorphism
    Stabilization
    Temperature
    Alanine
    Industry

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Chemistry(all)
    • Industrial and Manufacturing Engineering

    これを引用

    Effect of Specific Amino Acids on Controlling Crystal Pseudopolymorphism of L-Arginine Hydrochloride. / Shimizu, Takeshi; Yoshiura, Hiromu; Nagano, Hiroshi; Hirasawa, Izumi.

    :: Chemical Engineering and Technology, 巻 37, 番号 8, 2014, p. 1427-1430.

    研究成果: Article

    Shimizu, Takeshi ; Yoshiura, Hiromu ; Nagano, Hiroshi ; Hirasawa, Izumi. / Effect of Specific Amino Acids on Controlling Crystal Pseudopolymorphism of L-Arginine Hydrochloride. :: Chemical Engineering and Technology. 2014 ; 巻 37, 番号 8. pp. 1427-1430.
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