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用 Tb Cl3 和 La Cl3 与二苯甲酰甲烷和邻菲罗啉在无水乙醇溶液中反应 ,合成了异核稀土双配体的二苯甲酰甲烷——邻菲罗啉铽镧配合物。配合物经红外光谱分析 ,结果表明 ,配合物已形成。通过 C、H、N,稀土元素分析和热谱分析 ,确定该配合物为 Tb L a(DBM) 6(phen) 2 (DBM=二苯甲酰甲烷 ,phen=邻菲罗啉 ) ,在 43 0℃以上分解燃烧 相似文献
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4-酰代-双(1,3-二苯基-5-吡唑酮)螯合剂的合成与表征 总被引:2,自引:2,他引:0
于 90℃ ,以二氧六环为溶剂 ,Ca(OH) 2 为缩合剂 ,由 1,3 二苯基 5 吡唑酮分别与戊、己和癸二酰氯作用 (量比为 2∶1) ,合成了三种新的 β 二酮螯合剂 4 酰代 双 (1,3 二苯基 5 吡唑酮 )(各以符号P、H和D表示 ) ,收率为 6 5 .5 %、6 7.4%和 6 1.0 %。通过元素分析、红外光谱和核磁共振氢谱证实了产物的结构。测定了以它们为配体的Tb(Ⅲ )配合物的荧光光谱 ,结果表明 :这三种化合物的Tb(Ⅲ )配合物的荧光强度高于 4 酰代 双 (1 苯基 3 甲基 5 吡唑酮 )的Tb(Ⅲ )配合物 ;这三种化合物的Tb(Ⅲ )配合物荧光强度的顺序为P >H >D。 相似文献
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《分离科学与技术》2012,47(10):1521-1526
Synthesis and characterization of N,N,N′,N′-tetraoctylglutaricamide (TOGA) was carried out and used for extraction of U(VI) and Th(IV) from nitric acid solutions. The processes of extraction were determined by the slope analysis and by analyzing a function that allows the simultaneous treatment of all the experimental points obtained in different conditions. The different factors affecting the extraction distribution ratio(D) of U(VI) and Th(IV) (extraction concentration, concentrations of nitric acid, salting-out agent NaNO3 concentration, equilibration time, temperature, and types of diluents) were investigated. The results obtained indicated that the extraction species of U(VI) and Th(IV) are mainly extracted as UO2(NO3)2·1.0TOGA and Th(NO3)4·1.5TOGA. The apparent equilibrium constant of U(VI) and Th(IV) extraction determined are 3.35 ± 0.03 L3/mol3 and 1.87 ± 0.01 L5/mol5 at 298 ± 1 K. Thermodynamic parameters such as the free energy(ΔG), enthalpy(ΔH), and entropy(ΔS) changes associated with the extraction processes could be evaluated. Back-extraction of U(VI) and Th(IV) from organic phases was also studied. 相似文献
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介绍了N,N,N’,N’-四缩水甘油基-4,4’-二氨基二苯甲烷(TGDDM)环氧树脂的发展概况、固化动力学。综述了用橡胶、聚酰亚胺、双马来酰亚胺对其进行增韧改性以及目前的应用情况。 相似文献
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对9种N,N-二乙基甘氨酸酯的合成进行了研究。以SnC l2作催化剂,N,N-二乙基甘氨酸分别与正己醇、正辛醇、正癸醇、正十二烷醇、正十四烷醇、正十六烷醇、香叶醇、香茅醇和1,6-己二醇在环己烷中回流反应合成了N,N-二乙基甘氨酸正己酯、N,N-二乙基甘氨酸正辛酯、N,N-二乙基甘氨酸正癸酯、N,N-二乙基甘氨酸正十二烷醇酯、N,N-二乙基甘氨酸正十四烷醇酯、N,N-二乙基甘氨酸正十六烷醇酯、N,N-二乙基甘氨酸香叶醇酯、N,N-二乙基甘氨酸香茅醇酯和N,N-二乙基甘氨酸-6-羟基-1-己酯,其结构经IR谱1、HNMR谱和ESI-MS谱确证。并考察了各因素对产物收率的影响,较佳的反应条件是:n(脂肪醇)∶n(N,N-二乙基甘氨酸)∶n(氯化亚锡)=1∶1.2∶0.09,在环己烷中回流2.5 h,产物的收率为89.3%~97.6%。 相似文献
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The thermal stability of alkyl chitosan derivatives (RChi) and N,N,N‐trimethyl chitosan bearing different counter ions (TMCX) was assessed by means of TG analyses. Multistep TG curves were observed for TMCX regardless of the counter ion. They exhibited lower DTG peak temperatures (TMCCl/238.2°C, TMCBr/224.5°C, TMCI/222.6°C, and TMC‐SO4/237.0°C) as compared to the parent chitosan (306.4°C) while, in contrast, the RChi showed higher DTG temperatures (ButChi/311.7°C, OctChi/327.8°C, and DodecChi/306.3°C). The apparent activation energy values determined by using the isoconversional method revealed that the RChi derivatives have low activation energy (OctChi/111.6 ± 5 kJ/mol), whereas quaternary salts have high activation energy (TMCI/155.5 ± 10 kJ/mol). © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011 相似文献
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《分离科学与技术》2012,47(11):2526-2540
Abstract A novel Levextrel resin containing N,N,N′,N′-tetraisobutyl diglycolamide (TiBDGA) was synthesized by suspension polymerization of styrene and divinylbenzene and its performance for separation of Sr(II) from Rb(I) was investigated. The effects of crosslink degree, stirring speed, and the ratio of porogenic-agents on the resin synthesized were examined. The optimum TiBDGA resin with 40 wt.% divinylbenzene as cross linking agent and 20 wt.% of n-octanol as porogenic-agents provided excellent adsorption capacity of 22.5 mg/g. The distribution coefficient (K d) of Sr(II) in HNO3 media onto the resin depended heavily on the acidity in the aqueous solution. The maximum K d for Sr(II) (7300 mL/g) was observed when the HNO3 concentration in aqueous phase reached 2 mol/L. The difference in the Sr(II) and Rb(I) distribution coefficients of several orders of magnitude implied that 89Sr may be separated from 86Rb with a radionuclide purity greater than 99%. And the maximum static adsorption capacity of Sr(II) on the resin was 22.5 mg/g. 相似文献
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