Cryptands翻译

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August undefined, 2024

WebUse Enter / Space to view and traverse through the list of languages 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. …

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Web"cryptanoside" 中文翻译: [网络] 密码子 "cryptanalyticss" 中文翻译: cryptanalytics ; [,krit?n?'litiks] ; n. ; [复数,动词用单数] =cryptanalysis "cryptantha" 中文翻译: [网络] 冰片 … WebCryptands III.1 Introduction Like crown ethers, cryptands were designed and synthesized as binding receptors of smaller molecular substrates. A simple definition of a cryptand is a bicyclic (or polycyclic) ligand.1 This definition was derived from Lehn's observations of the behavior of cryptands with alkali metals. green and white striped christmas stocking

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WebThe cryptands have the same kind of properties as the crown ethers and the same uses. In general, they form much more strongly bound complexes and can be used to stabilize unusual ionic species. For example, it is possible to produce the negative Na− ion in the compound [(2,2,2)-cryptand-Na]+Na−, which is a gold-coloured crystalline ... WebDec 29, 2024 · Cryptands are a group of organic compounds that contain ether groups and nitrogen atoms. These are either cyclic or non-cyclic structures. We can define them as bicyclic or polycyclic synthetic … 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. green and white striped chair

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WebJean-Marie Lehn (born 30 September 1939) is a French chemist.He received the Nobel Prize in Chemistry together with Donald Cram and Charles Pedersen in 1987 for his synthesis of cryptands.Lehn was an … WebDuodenum, l.s. showing vi lli, crypts, and glands - Jejunum. [...] of man, l.s. showing intestinal wall, [...] folds, and villi - Jejunum, l.s. of intestinal villi medium magnification - … green and white striped curtainWebJul 4, 2024 · Texas A&M University-Commerce. The key difference between crown ethers and cryptands is that crown ethers are cyclic structures containing ether groups, whereas cryptands are either cyclic or non ... green and white striped dress forever 21

"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 ... " - Cryptands翻译

Cryptands翻译

Cryptands spherands - Big Chemical Encyclopedia

Webcrypto翻译：加密货币（cryptocurrency 的缩写）, 加密（encryption 的缩写）, 隐藏的；秘密的。了解更多。 WebCryptands spherands Cross-fertilisation between the crown ethers (or, more generally, corands), cryptands, spherands and podands has produced an enormous range of …

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Web翻译器. Translate texts with the world's best machine translation technology, developed by the creators of Linguee. 词典. Look up words and phrases in comprehensive, reliable … WebThe Crossword Solver found 30 answers to "crypts", 8 letters crossword clue. The Crossword Solver finds answers to classic crosswords and cryptic crossword puzzles. …

Webcryptand ( plural cryptands ) ( chemistry) any of a class of polycyclic compounds related to the crown ethers, having three chains attached at two nitrogen atoms. This page was last … WebCryptands (from the Greek kryptós, meaning “hidden”) are compounds that can completely surround a cation with lone pairs of electrons on oxygen and nitrogen atoms (Figure 18.7.1b).The number in the name of the cryptand is the number of oxygen atoms in each strand of the molecule. Like crown ethers, cryptands can be used to prepare solutions …

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 … WebDec 1, 2004 · Cryptands find applications in many fascinating areas chemistry, biochemistry and material science due to their architectural and functional plasticity. This review discusses in detail different methods synthesis the recently reported cryptands and their applications, viz. in the recognition cations, anions and neutral molecules, as …

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 , …

WebSep 18, 2024 · 2. The Nobel Prize for Chemistry in 1987 was given to Donald J. Cram, Jean-Marie Lehn, and Charles J. Pedersen for their efforts in discovering and determining uses of cryptands and crown ethers. 3. They are exceptionally versatile in selectively bindig a range of metal ions and a varirety organic neutral and ionic species. Crown ethers are ... green and white striped dressWebSep 25, 2014 · Cryptand Cryptands are a family of synthetic bi- and polycyclic multidentate ligands for a variety of cations.[1] The Nobel Prize for Chemistry in 1987 was given to Donald J. Cram, Jean-Marie Lehn, and Charles J. Pedersen for their efforts in discovering and determining uses of cryptands and crown ethers, thus launching the now fluorishing … green and white striped curtainsWebCryptands were introduced by Jean-Marie Lehn in 1969 as cage-shaped selective ligands for alkali and alkaline-earth metal ions, which lie at the heart of supramolecular chemistry. This book reports on much of the research in the field since the '70s, and looks at, amongst other topics, metal coordination chemistry, anion coordination chemistry ... flower sayings quotesWeb搜狗翻译可支持中、英、法、日等50多种语言之间的互译功能，为您即时免费提供字词、短语、文本翻译服务。 green and white striped cushionsWebthe design, synthesis, and binding properties of the cryptands by J.-M. Lehn, J.-P. Sauvage, and B. Dietrich [5,6] further demonstrated the attractions and opportunities of complexation chemistry. Although we tried to interest grad-uate students in synthesizing chiral crown ethers from 1968 on, the efforts were flower sayings svgWebCryptands是一系列用于各种阳离子的合成双环和多环多齿配体。1987年的诺贝尔化学奖授予了DonaldJ.Cram、Jean-MarieLehn和CharlesJ.Pedersen，以表彰他们在发现和确定 … flowers aylesfordWeb一站式科研服务平台. 学术工具. 文档翻译; 收录引证; 论文查重; 文档转换 green and white striped dress plus size maxi