β-diketone type chelating ligands have high coordinative activity and selectivity, and are widely applied in analytical chemistry. In order to obtain profounder understanding to the properties of bis(4-acylpyrazolone-5), A new 4-acylpyrazol-5-one derivative (H2BPMPP) was syntheszed, which contains a heterocyclic ring between two 1-phenyl-3-methyl-4-acylpyrazol-5-one rings. The new compound was characterized by element analyses, UV, IR and 1H NMR spectra. The equilibrium of the keto-enol tautomerism was studied. The results show that a lower dielectric constant of solvent favors the enol form which has a higher λmax. Due to special merits of paraffin wax, the solid-liquid extraction behavior of Ce(Ⅲ) with molten paraffin wax as a diluent was also investigated at higher temperature. The value of the pH1/2 was 3.19 and the value of logKex was 3.467. The chemical composition of the complex was obtained by the slope analysis method.
参考文献
| [1] | Dong X C;Liu F C;Zhao Y L .Synthesis of some new acyl pyrazolone type chelating agents[J].化学学报,1983,41(09):848. |
| [2] | Yang L Q;Yang R D .Rare earth coordination compounds (Ⅲ). New chelating agents-preparation and properties of alkanedioyl bispyrazolinones[J].Journal Lanzhou Univ(Natural Science)(in Chin),1989,24(03):134. |
| [3] | 尹显洪,杨满芽,史华红,杨光,陈小明,古练权.吡啶二甲酸类配体-EDTA-铽三元配合物的荧光性能[J].中国稀土学报,2000(03):211-215. |
| [4] | Xing Y C;Yan L;Liu H X et al.The fluorescence properties of Tb(Ⅲ)-BPMPHD-CTMAB system and its analytical applications[J].Chemical Journal of Chinese Universities-Chinese,1991,12(03):315. |
| [5] | Li X J;Xing Y C;Dong W J et al.Syntheses and properties of ternary of rare earth elements with 1′-phenyl-3′-methyl-5′-oxopyrazole-4′-formylmethanoic acid and 1 10-phenanthroline[J].Chemical Journal of Chinese Universities-Chinese,1991,12(03):285. |
| [6] | Yan L;Yang R D;Ji X P et al.Flurescence properties of Terbium(Ⅲ)-1 4-bis(1-phenyl-3-methyl-5-oxopyrazole-4)butanedione system and its analytical applications[J].Analytical Chemistry,1992,20(01):100. |
| [7] | Miyazaki S;Mukai H;Umetani S et al.Steric effect of polymethylene chain length on the liquid-liquid extraction of copper(Ⅱ) with bis(4-acylpyrazol-5-one)derivatives[J].Inorganic Chemistry,1989,28(15):3014. |
| [8] | Gao J Z;Hu G L;Kang J W et al.Thermodynamic investigations of aqueous-molten paraffin wax liquid-liquid extractions and synergistic extraction of some trivalent rare earth elements[J].Talanta,1994,41(04):541. |
| [9] | Singer Al W;Mcelvain S M .Relative reactivities of certain 2- and 2 6-substituted piperidines[J].Journal of the American Chemical Society,1935,57(05):1136. |
| [10] | Kong B X;Li Y Y;Yang Y S .Studies on synthesis for 1-phenyl-3-methyl-4-(β-benzoylocetyl)pyrazolone-5 and its equilibrium of keto-enol tautomerism[J].Chemical Journal of Chinese Universities-Chinese,1991,12(06):719. |
| [11] | Liu J M;Yang R D;Peng W T et al.Synergistic extraction of cerium by BPMOPP and 1 10-phenanthroline[J].应用化学,1994,11(01):1. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%