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- Synthesis of Open Chaining Crown Ether Compound 開(kāi)鏈冠醚衍生物的合成
- In this article, the progresses in recent years of application of crown ether compounds to GLC chromatography, especially chiralcrown ethers and polysiloxane Stationary liquids, were introduced. 本文簡(jiǎn)要介紹了近年來(lái)冠醚化合物，特別是帶有手性的冠醚化合物及聚硅氧烷冠醚固定液在氣液相色譜中的應用發(fā)展。
- crown ether compounds mimetic enzyme 冠醚化合物的模擬酶
- Keywords fluorides;crown ethers compounds;dimethylsulfoxide; 氟化物;冠式化合物;二甲基亞砜;
- Under acid condition open chaining crown ether diaromatic aldehyde can react, and they will synthesize a compound of chaining crown ether diaromatic aldehyde thiosemi-carbazone kind. 摘要鏈狀冠醚二芳醛在酸性條件下與氨基硫脲反應，合成了鏈狀冠醚二芳醛縮氨硫脲類(lèi)化合物。
- A review with 21 references on development and applications of calix crown ethers are described. 摘要綜述了杯芳冠醚的產(chǎn)生、發(fā)展及應用研究的新進(jìn)展，展望了它的工業(yè)應用前景。
- Asymmetric allylation of 2-nitrocycloketones was catalyzed by palladium with chiral ferrocenylphosphine ligand modified by monoaza crown ethers (A-D). 在用氮雜冠醚改良的手性二茂鐵膦與鈀的絡(luò )合物催化下,2-硝基環(huán)酮可進(jìn)行不對稱(chēng)烯丙基化反應。
- Calculations using CNDO/2 method have been performed for the reactions of some crown ethers with alkali ions in aqueous solutions. 本文應用CNDO/2方法對幾種冠醚與堿金屬離子在水溶液中的配位反應能進(jìn)行了計算。
- In this paper ten lactonic crown ethers weresynthesized, of which seven were new compounds.Theirstructures were confirmed by EA,IR,1HNMR andMS analysis. 合成了10個(gè)內酯型冠醚化合物，其中7個(gè)冠醚是新化合物，其結構均由元素分析，及紅外、核磁、質(zhì)譜分析證實(shí)。
- Animal experiment shows that the coumar ether compound extracted from feverfew can treating bronchial asthma, bronchitis and emphysema effectively. 動(dòng)物實(shí)驗證明，這類(lèi)從菊科植物中提取的香豆草醚類(lèi)化合物可有效治療和改善支氣管哮喘、慢性支氣管炎、肺氣腫的癥狀。
- Three kinds of crown ethers were synthesized for the study of sodium ion-selective electrode. They are bis(crown ether)s, derivatives of hydroxy-crown ether and open-chain amide. 本文為滿(mǎn)足研制鈉離子選擇電極的需要,根據主客體化學(xué)、配位化學(xué)和離子選擇電極等理論,設計并合成了三類(lèi)新型冠醚化合物,它們的結構經(jīng)元素分析、紅外、核磁共振和質(zhì)譜數據確證。
- The recent progress of application of liquid crystalline crown ethers,carbon nanotube and water-soluble calixarene on analytical chemistry was reviewed. 綜述了液晶冠醚、碳納米管、水溶性杯芳烴在分析化學(xué)中應用的新進(jìn)展。
- In another direction, the radical cyclization of thioimide with acylsilane produced simple cyclization product in low yield without expected enol silyl ether compound. 對于硫醯亞胺與矽基酮的自由基反應，則是得到低產(chǎn)率的簡(jiǎn)單環(huán)化產(chǎn)物，而不是預期的烯醇矽醚化合物。
- Two amide type double armed crown ethers containing dibenzo 18 crown 6 unit were synthesized and their structures were confirmed by IR, 1HNMR,MS and elemental analysis. 合成了2個(gè)含二苯并-18-冠-6單元的酰胺型雙臂冠醚化合物,其結構經(jīng)IR、1HNMR、MS和元素分析確證,該2個(gè)化合物都不具有液晶性。
- Terbium perchlorate complexes with crown ethers and p-phthalic acid have been synthesized and characterized by elemental analysis,molar conductivity and IR spectra. 合成了鋱及摻熒光惰性鑭、釓、釔的鋱冠醚對苯二甲酸配合物。
- This article reviewed the synthesis of N-substituted aza crown ethers and their new applications to the field of selective complexation and extraction for metal ions. 綜述了N-取代氮雜冠醚的合成和對金屬離子的選擇性絡(luò )合和萃取研究的新進(jìn)展.
- The reformulated gasoline must contain less volatile organic compounds and a higher amount of oxygen (in the form of alcohol or an ether compound). 改良過(guò)的汽油必須含有較少的揮發(fā)性有機化合物，而又含有較高量的氧（以酒精或乙醇的形式）。
- The extraction mechanism of At is inferred as following:The complex-anions AtX2-(X = Cl-, Br-, I-, OH-) were formed, mainly in aqueous solutions and paired with the cations M+(M=H+, K+, Na+), then the ion pair was extracted by crown ethers . At在溶液中主要形成絡(luò )合陰離子AtX_2-(X=CI~-,Br~-,I~-,OH~-),它與適宜的陽(yáng)離子M~+(M=H~+,K~+,Na~+)配成離子對被冠醚所萃取,這是At被萃取的主要形式,萃取反應簡(jiǎn)單表示為:M~++C_(有)+AtX_2~-(?)
- Three polystyrene-supported benzo-15-crown-5 and two polystyrene-supported acyclic crown ethers were prepared, and their complex capacities for K~+ and Na~+ and phase-transfer catalytic properties were investigated. 本文報道了三種聚苯乙烯支載苯并-15-冠-5與兩種聚苯乙烯支載無(wú)環(huán)冠醚的合成,并研究了它們對K~+與Na~+的絡(luò )合性能與相轉移催化性能。
