1,1′-和1,2′-二萘甲酮结构的光谱分析

本文用红外光谱仪 (FTIR)、紫外分光光度计 (UV)对在无水AlCl3 存在下萘与草酰氯反应合成的1 ,1′ 和 1 ,2′ 二萘甲酮的结构进行了研究。结果表明 ,1 ,1′ 和 1 ,2′ 二萘甲酮结构 (对称性 )上的差别表现出FTIR、UV光谱图上的明显不同。

铕-噻吩甲酰三氟丙酮-N,N'-二萘基-N,N'-二苯基-3,6-二氧杂辛二酰胺三元体系荧光法测定痕量铕

以开链冠醚Ｎ，Ｎ′－二萘基－Ｎ，Ｎ′－二苯基－３，６－二氧杂辛二酰胺（ＤＤＤ）对铕－噻吩甲酰三氟丙酮二元体系的荧光增强效应建立了一种测定痕量铕的新方法，并研究了其荧光机理。激发和发射波长分别为３４３．６ｎｍ和６１３．３ｎｍ．利用常规和导数荧光法分别测定了高纯氧化钇中的痕量铕，线性范围分别为３．６４７×１０３～３．０３μｇ·ｍＬ－１（（检测限２．２７９×１０－４μｇ·ｍＬ－１）和７．５９８×１０－４～０．０２４３１μｇ·ｍＬ－１，０．０６０７８～０．６１００μｇ·ｍＬ－１（检测限８．５６６×１０－５μｇ·ｍＬ－１），并考查了共存稀土离子和其它非稀土离子对测定的干扰。方法简单、快速、准确。

2-二乙硫基亚甲基-3-羰基(羟基)丁酸乙酯与吲哚及其衍生物的(脱硫)偶联反应

在回流条件下,二甲亚砜(DMSO)作溶剂,在20 mol%联萘酚酸存在下,2-二乙硫基亚甲基-3-羰基丁酸乙酯与吲哚及其衍生物能有效地进行脱硫偶联反应,高产率地生成β-吲哚基-β-乙硫基不饱和羰基化合物。在相同条件下,2-二乙硫基亚甲基-3-羟基丁酸乙酯与吲哚及其衍生物能有效地进行偶联反应,高产率地生成α-吲哚基二硫缩烯酮。该反应具有催化剂经济易得及其用量少、反应条件温和、环境友好和易操作等优点。

PRIMARY AMINE DRUG SELECTIVE ELECTRODES WITH SPECIAL CROWN ETHERS AS NEUTRAL CARRIERS*

Ionophores selectively sensitive to primary amines have been synthesized which display low potentiometric selectivity coefficients for K+, Na+ and NH4+ ions, secondary and tertiary amines as well as quaternary ammonium ions. These ionophores include macrocyclic polyethers with dinaphthyl subunits and azocrown ether with nitrogen donor atoms. The feasibility of these ionophores for preparing primary amine drug selective electrodes was investigated in detail. Practically usable PVC membrane electrodes sensitive to primary amine drugs, such as mexiletine, dopamine, metaraminol and tryptamine, and aliphatic primary amines have been prepared with these ionophores as neutral carriers. Direct potentiometric methods for assaying these drugs have been proposed by using the prepared electrodes. The proposed primary amine drug selective electrodes are remarkably superior to those based on ion-associates. Compared with the electrodes based on common ethers, the interference by K+, Na+ and NH4+ ions is