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单质碘
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  molecular iodine
     Bis(indolyl)methanes can be prepared rapidly in several minutes and in good yields from indole with arylaldehydes or imine under microwave irradiation using molecular iodine on neutral alumina as a catalyst. Their structure were characterized by ~1H NMR, IR and elemental analysis.
     在无溶剂微波辐射下,芳醛或亚胺在中性三氧化二铝吸附的单质碘催化下快速地与吲哚发生亲电取代反应制得双吲哚甲烷衍生物(收率70%~97%),其结构经1HNMR,IR和元素分析表征。
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  “单质碘”译为未确定词的双语例句
     Futher reaction of compound 1 with I 2 in chloroform to yield Fe_Fe bond cleaved product, 1,1 Fc[(Me 4Cp)Fe(CO) 2I] 2(2).
     化合物 1在氯仿中与单质碘反应 ,Fe_ Fe键断裂 ,生成二茂铁桥连双铁碘化合物 1 ,1 -Fc[( Me4Cp) Fe( CO) 2 I]2 ( 2 ) .
短句来源
     Synthesis of butanone 1,2-propanediol ketal catalyzed by iodine was studied.
     以单质碘为催化剂、通过丁酮和1,2-丙二醇反应合成丁酮1,2-丙二醇缩酮。
短句来源
     The yield ofβ-naphthyl acetate was 98.0% under the optimal conditions: solvent free,β-naphthol 3.6 g (0.025 mol) , acetic anhydride 3.0 mL (0.032 mol) , iodine 0.634 5 g (0.002 5 mol),reaction time 40 min and reaction temperature 80℃.
     结果表明:在无溶剂、3.6 g(0.025 mol)β-萘酚、3.0 mL(0.032 mol)乙酸酐、0.634 5 g(0.002 5 mol)粒状单质碘、反应温度80℃、反应40 min的条件下,乙酸-β-萘酯的产率可达98.0%。
短句来源
     Catalytic synthesis of butyraldehyde 1,2-propanediol acetal with iodine
     单质碘催化合成丁醛1,2-丙二醇缩醛
短句来源
     The optimum membrane consists of 2-4 mg pyrene, 50mg PVC, 100 mg bis(2 -ethylhexyl)phalate. With the optimum sensing membrane described, iodine in sample solutions from 2. 26×10~(-5) to 1. 04X10~(-3) mol/L can be determined.
     本文据此研制了用于测定单质碘浓度的荧光敏感膜,最佳膜组成为2~4mg芘、50mgPVC粉、100mg邻苯二甲酸二异辛酯,测定碘的浓度范围为2.26×10~(-5)~1.04×10~(-3)mol/L。
短句来源
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  相似匹配句对
     Catalytic Synthesis of Acetals and Ketals with Iodine
     单质催化合成缩醛(酮)
短句来源
     I2 is used in the synthesis of ketal as catalyst.
     以单质为催化剂用于缩酮的合成。
短句来源
     Detection of Iodine by Precipitation Analysis Method
     沉淀滴定法测定
短句来源
     The spectrophotometric determination of microamount of atomic iodine
     (I)的分光光度法测定
短句来源
     New Members of Monoatomic Carbon
     碳单质的新成员
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  molecular iodine
A~dependence of the unipolar charge injection on the initial conductivity for a solution of molecular iodine in transformer oil is obtained.
      
In particular, the yield of radiolytic hydrogen from cyclohexane in the presence of molecular iodine increases when benzene is added to a cyclohexane solution.
      
This fact is primarily explained by a decrease in the steady-state concentration of molecular iodine with increasing the pH.
      
Chromaticity Characteristics of NH2Hg2I3 and I2: Molecular Iodine As a Test Form Alternative to Nessler's Reagent
      
The chromaticity characteristics were studied for the product of the reaction of Nessler's reagent with ammonium ions and for solutions of molecular iodine.
      
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  iodine (i 2)
This research describes the effects of short-term elemental iodine (I2) and iodide (I-) replacement on thyroid glands and mammary glands of iodine-deficient (ID) Sprague-Dawley female rats.
      
Unfortunately, the iodine (I2) itself could not be determined with the method proposed.
      
A method has been developed for photometric detection of cyclodextrins (CD) in liquid chromatography using iodine (I2) generated electrochemically in-situ.
      
The substituted and partly branched polyphenylenesulphides obtained have been doped with iodine (I2).
      
Polyacetylene was doped with evaporated iodine (I2).
      
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Solid state reactions of potassium fcrricyanidc with potassium iodide, potassium sulfidc at room temperature arc investigated. The results show that the formation of iodine and potassium fcrrocyanidc when potassium fcrricyanide and potassium iodide are mixed in the solid state at room temperature, while in solution this reaction would be reversed according to standard reduction potentials. It is also found that no reaction occurs between potassium fcrricyanidc and sodium borohydride in solid state, but the reaction...

Solid state reactions of potassium fcrricyanidc with potassium iodide, potassium sulfidc at room temperature arc investigated. The results show that the formation of iodine and potassium fcrrocyanidc when potassium fcrricyanide and potassium iodide are mixed in the solid state at room temperature, while in solution this reaction would be reversed according to standard reduction potentials. It is also found that no reaction occurs between potassium fcrricyanidc and sodium borohydride in solid state, but the reaction can take place in aqueous solution.

本文首次报道了铁氰化钾在室温下与碘化钾、硫化钾的固相氧化还原反应,实验发现在固相下铁氰化钾与碘化钾混合后,生成单质碘和亚铁氰化钾,而在溶液中该反应是反方向进行的.实验还发现,在固相下铁氰化钾与还原剂硼氢化钠不反应,而在溶液中,该反应却能进行.对反应机制进行了初步探讨.

A new fluorescence sensing membrane for the determination of iodine based on reversible fluorescence quenching of pyrene dissolved in plasticized polyvinyl chloride (PVC) has been developed. The optimum membrane consists of 2-4 mg pyrene, 50mg PVC, 100 mg bis(2 -ethylhexyl)phalate. With the optimum sensing membrane described, iodine in sample solutions from 2. 26×10~(-5) to 1. 04X10~(-3) mol/L can be determined. Besides a high reproducibility of the optical signals,the very short response time of less than 40...

A new fluorescence sensing membrane for the determination of iodine based on reversible fluorescence quenching of pyrene dissolved in plasticized polyvinyl chloride (PVC) has been developed. The optimum membrane consists of 2-4 mg pyrene, 50mg PVC, 100 mg bis(2 -ethylhexyl)phalate. With the optimum sensing membrane described, iodine in sample solutions from 2. 26×10~(-5) to 1. 04X10~(-3) mol/L can be determined. Besides a high reproducibility of the optical signals,the very short response time of less than 40 s is realized. The membrane has good selectivity, except for Fe3+ and Bi3+, other usual ions in foods do not interfere. The proposed method has been applied to the determination of iodine in table salt with satisfactory results.

单质碘熄灭固定于增塑的PVC膜中的芘的荧光,且这种熄灭作用可逆。本文据此研制了用于测定单质碘浓度的荧光敏感膜,最佳膜组成为2~4mg芘、50mgPVC粉、100mg邻苯二甲酸二异辛酯,测定碘的浓度范围为2.26×10~(-5)~1.04×10~(-3)mol/L。此膜测定单质碘的重现性好,响应时间小于40s。除Fe~(3+)、Bi~(3+)外,其它常见离子均无干扰。将此膜用于食盐中碘的测定,结果令人满意。

iI this paper pure iodine solutions used to measure concentrations of chlorine dioxide solutions are presented. The results of the experiment indicate that alinear relation is obtained between the absorbance and the anount of chloriae dioxide in the range of 0. 035 to 1. 0 mg/L by using 5cm cell. The analytical approaches are simple and suitable for measaring low chlorine dioxide concentrations. Moreover. the method can be used to measure chlorine concentrations.

本文提出了以单质碘溶液作为测定二氧化氯标准物质的方法.试验结果表明.该方法是可行的.用5cm比色皿在0.035~1.0mg/L范围内吸光度与二氧化氯浓度是显著的线性关系.该方法操作方便,测定精度高,可用于二氧化氯低浓度的测定.同时,该方法还可用作测定合氧等的标准物质,具有广泛的实用性.

 
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