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Gabapentin coordination networks: Mechanochemical synthesis and behavior under shelf conditions

机译:加巴喷丁配位网络:货架条件下的机械化学合成与行为

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摘要

Active pharmaceutical ingredients (API) coordination complexes and networks present a promising pathway for developing new bioinspired materials. In the present study, we report several coordination networks of gabapentin with Y(III), Mn(II), and several lanthanides (LnCl_3), Ln = La~ (3+), Ce~(3+), Nd~(3+), Er~(3+) obtained by mechanosynthesis. To the best of our knowledge, these are among the first coordination networks of pharmaceuticals involving lanthanides. These novel compounds proved to be unstable under shelf conditions, are thermally stable until water release at approximately 80 C, and decompose above 200-250 C. The coordination networks obtained present different structural architectures based on mono-, di-, tri-, and hexa-metallic centers (herein called monomers, dimers, trimers, and hexamers), and also a one-dimensional polymeric chain was obtained. Gabapentin chelation modes are the same in most of the networks, adopting three typical geometries: the bidentate coordination - chelation, mode I; the bridge coordination, mode II, and the "bidentate-bridge" coordination, mode III. NMR studies show that the compounds have different behavior in solution, where a single coordination mode seems to be present.
机译:活性药物成分(API)配合物和网络为开发新型生物启发性材料提供了有希望的途径。在本研究中,我们报道了加巴喷丁与Y(III),Mn(II)和几种镧系元素(LnCl_3),Ln = La〜(3 +),Ce〜(3 +),Nd〜(3)的配位网络。 +),Er〜(3+)通过机械合成获得。据我们所知,这些是涉及镧系元素的最早的药物协调网络。这些新颖的化合物在搁置条件下被证明是不稳定的,直到大约80 C的水分释放才是热稳定的,并在200-250 C以上的温度下分解。获得的配位网络基于一元,二元,三元和三元结构呈现不同的结构结构。六金属中心(本文称为单体,二聚体,三聚体和六聚体),以及一维聚合物链。加巴喷丁的螯合模式在大多数网络中都相同,采用三种典型的几何结构:双齿配位-螯合,模式I;桥梁协调,模式II和“双齿桥”协调,模式III。 NMR研究表明,化合物在溶液中的行为不同,其中似乎存在单一配位模式。

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