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- The Chromogenic Crown Ethers 生色冠醚
- Keywords chromogenic crown ether;lariat crown ether;monoazacrown ether;synthesis; 生色冠醚;套索冠醚;单氮杂冠醚;合成;
- Keywords chromogenic crown ether synthesis complex electronic spectrum coloration; 生色冠醚;合成;配合物;电子光谱;变色作用;
- Synthesis of Bis-azo Chromogenic Acyclic Crown Ethers 双偶氮生色开链冠醚的合成
- The chromogenic reaction between HSCT and silver was studied. 研究了氯磺酚偶氮硫代若丹宁 (HSCT)与银的显色反应。
- A review with 21 references on development and applications of calix crown ethers are described. 摘要综述了杯芳冠醚的产生、发展及应用研究的新进展，展望了它的工业应用前景。
- Asymmetric allylation of 2-nitrocycloketones was catalyzed by palladium with chiral ferrocenylphosphine ligand modified by monoaza crown ethers (A-D). 在用氮杂冠醚改良的手性二茂铁膦与钯的络合物催化下,2-硝基环酮可进行不对称烯丙基化反应。
- We will comfirm the results by doing the chromogenic reaction and sequencing. 由客户提供目的基因和载体。
- Calculations using CNDO/2 method have been performed for the reactions of some crown ethers with alkali ions in aqueous solutions. 本文应用CNDO/2方法对几种冠醚与碱金属离子在水溶液中的配位反应能进行了计算。
- 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个内酯型冠醚化合物，其中7个冠醚是新化合物，其结构均由元素分析，及红外、核磁、质谱分析证实。
- 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. 本文为满足研制钠离子选择电极的需要,根据主客体化学、配位化学和离子选择电极等理论,设计并合成了三类新型冠醚化合物,它们的结构经元素分析、红外、核磁共振和质谱数据确证。
- The recent progress of application of liquid crystalline crown ethers,carbon nanotube and water-soluble calixarene on analytical chemistry was reviewed. 综述了液晶冠醚、碳纳米管、水溶性杯芳烃在分析化学中应用的新进展。
- The chromogenic responding ability increases as the substituent changes from phenyl to naphthyl or anthryl. 实验结果表明，偶氮基团的引入改善了8-羟基喹啉的生色能力，并且在乙腈溶液中随着取代基由苯基变为萘基和蒽基时，化合物的吸收光谱发生红移。
- 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个含二苯并-18-冠-6单元的酰胺型双臂冠醚化合物,其结构经IR、1HNMR、MS和元素分析确证,该2个化合物都不具有液晶性。
- The error coefficient related not only totransmittance,but also to original transmiffance of the chromogenic solution. 结果表明，退色型间接分光光度法的浓度测量误差系数不仅与测量透光率有关，而且与原有色溶液透光率有关。
- The crown of St Wenceslas was in prague cathedral. 圣文萨斯雷的皇冠保存在布拉格大教堂。
- Terbium perchlorate complexes with crown ethers and p-phthalic acid have been synthesized and characterized by elemental analysis,molar conductivity and IR spectra. 合成了铽及掺荧光惰性镧、钆、钇的铽冠醚对苯二甲酸配合物。
- Thus the platinum in the platinum plating bath was determined by means of spectrophotometry,using stannous chloride as the chromogenic agent. 镀铂是装饰性电镀的重要镀种,铂是镀铂溶液中的主成分,检测和控制其含量对获得最佳的镀层质量十分重要。
- 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. 综述了N-取代氮杂冠醚的合成和对金属离子的选择性络合和萃取研究的新进展.
- In this paper,the chromogenic system in combination with multiwavelength linear regression method was applied to simultaneous determination of tu. 文章应用这一显色体系井结合多波长线性回归法，对合成样品中钨、钼进行了同时测定，所得结果满意。
