WebThe cryptands are three-dimensional, cation-enveloping host compounds that normally contain nitrogen and oxygen donors but may contain sulfur or other heteroatoms as well. … Web百度翻译提供即时免费200+语言翻译服务，拥有网页、app、api产品，支持文本翻译、文档翻译、图片翻译等特色功能，满足用户查词翻译、文献翻译、合同翻译等需求，随时随 …

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Synthesis and Applications of Cryptands - DeepDyve

WebLes cryptands sont une famille de ligands synthétiques bicycliques ou polycycliques pour une sorte de cation. En 1987, le prix Nobel de chimie a été attribué à Donald J. Cram, Jean-Marie Lehn, et Charles J. Pedersen pour leur travail sur les utilisations des cryptands et les éthers couronnes, ce qui a donné naissance au domaine de la ... WebCryptands are more expensive and difficult to prepare, but offer much better selectivity and strength of binding than other complexants for alkali metals, such as crown ethers. They are able to bind otherwise insoluble salts into organic solvents. They can also be used as phase transfer catalysts by transferring ions from one phase to another. WebCompositions with supramolecular structures for agricultural use include a pesticide, a supramolecular host chemical or a supramolecular guest chemical configured to engage in host-guest chemistry with the pesticide, and a solvent, and methods of preparing the same, are included. Methods of controlling weeds at a crop site include applying an … du shiniang sinks her jewel box in anger