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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >A lifelong Odyssey: from structural and morphological engineering of functional solids to bio-chirogenisis and pathological crystallization
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A lifelong Odyssey: from structural and morphological engineering of functional solids to bio-chirogenisis and pathological crystallization

机译:毕生难忘的冒险之旅:从功能性固体的结构和形态工程学到生物鸡血石病和病理性结晶

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摘要

This cooperative endeavour first describes early studies in chemical crystallography, encompassing molecular packing modes, characterization of weak hydrogen bonds, the engineering of functional crystals and monitoring of reaction pathways in molecular crystals by x-ray and neutron diffraction. With the design of 'tailor-made' auxiliary molecules, it became possible to correlate molecular enantiomerism and crystal enantiomorphism, to control the early stages of crystal nucleation, to resolve enantiomers by crystallization, induce the precipitation of metastable polymorphs, and shed light on the role played by solvent on crystal growth. With such auxiliaries, the structure of mixed crystals was revised and the ability to perform 'absolute' asymmetric synthesis in host centrosymmetric crystals demonstrated. With the introduction of grazing incidence synchrotron x-ray diffraction from liquid surfaces it also became possible to design and characterize crystalline thin film architectures at the air-water interface providing a general insight on the mechanism of crystal nucleation at the molecular level, in particular that of ice and cholesterol. Finally the collective knowhow from these studies were crucial for obtaining homochiral peptides prepared from the polymerization of racemates of amphiphilic amino acids dissolved in aqueous solution, and for experiments towards elucidating the pathological crystallization of cholesterol and the malaria pigment in Plasmodium-infected red blood cells.
机译:这种合作努力首先描述了化学晶体学的早期研究,包括分子堆积模式,弱氢键的表征,功能晶体的工程设计以及通过X射线和中子衍射监测分子晶体中的反应途径。通过“量身定做”的辅助分子的设计,可以将分子对映异构体和晶体对映体相关联,控制晶体成核的早期阶段,通过结晶化解对映体,诱导亚稳多晶型物的沉淀,并向溶剂对晶体生长的作用。使用这样的助剂,可以改变混合晶体的结构,并证明了在宿主中心对称晶体中执行“绝对”不对称合成的能力。随着从液体表面掠入入射的同步加速器X射线衍射的引入,在空气-水界面处设计和表征晶体薄膜结构成为可能,从而提供了在分子水平上晶体成核机理的一般见识,特别是冰和胆固醇。最后,这些研究的集体知识对于获得由溶解在水溶液中的两亲氨基酸的外消旋物聚合制得的同手性肽,以及阐明在感染疟原虫的红细胞中胆固醇和疟疾色素的病理性结晶的实验至关重要。

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