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O. Pollak v. Emhofen 《Fresenius' Journal of Analytical Chemistry》1958,163(5):377
Ohne Zusammenfassung 相似文献
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H. Gamsjäger 《Monatshefte für Chemie / Chemical Monthly》1965,96(4):1224-1227
Ohne ZusammenfassungMit 1 AbbildungHerrn Prof Dr.E. Schwarz-Bergkampf zum 60. Geburtstag gewidmet. 相似文献
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The solvothermal reaction of MnCl2 · 4H2O or CoCl2 · 6H2O with tris(4‐carboxyphenyl)‐phosphine oxide (H3TPO), in DMF orDMA resulted in the four coordination polymers [M3(tpo)2(dmf)(H2O)2]( 1 : M = Mn; 2 : M = Co), (NMe2H2)[Mn3Cl(HCO2)(htpo)(tpo)(H2O)] ( 3 ) and (NMe2H2)[Mn3(tpo)2(OAc)] ( 4 ). Structural characterization by X‐ray crystallography revealed that 1 – 4 form 3‐periodical infinite networks; after synthesis solvent molecules occupy the framework pores. The topologies of the networks in 1 , 2 and 3 are unprecedented in literature and are systematically characterized. Furthermore, these topologies could be derived from hexagonal close packing ( 1 , 2 ) and cubic close packing ( 3 ), respectively.Compounds 1 , 2 and 4 were synthesized as pure crystalline materials, their thermal behaviour was examined by TG/DTA measurements and temperature dependent PXRD. 1 , 2 and 4 show remarkable thermal stability with decomposition temperatures between 450 and 500 °C. Temperature dependent PXRD measurements of compounds 1 and 2 reveal a structural transition at 260 °C, framework 4 loses its crystallinity at 210 °C. 相似文献
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Livantsov M. V. Prishchenko A. A. Livantsova L. I. Nikolaev S. N. Grigor'ev E. V. 《Russian Journal of General Chemistry》2003,73(2):315-316
Russian Journal of General Chemistry - 相似文献
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以P2O5为脱水剂,甲烷磺酸为溶剂,二苯亚砜与二苯硫醚反应制备了(4-苯硫基-苯基)二苯基硫六氟磷酸盐.对产物进行了元素分析、紫外光谱、红外光谱、气-质联用和核磁共振的结构确证.该硫盐对环氧树脂具有良好的固化性能. 相似文献
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Tomoyuki Tajima Yukie Yamaguchi Yo-hei Shiomoto Yutaka Takaguchi 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1):2-11
Abstract We succeeded in the synthesis of a novel poly(amidoamine) dendrimer having diphenyl diselenide at the core. Modification of the dendrimer diselenide by the reaction with glucono-δ-lactone in methanol gave a water-soluble dendrimer diselenide having chiral terminal groups. The structures of dendrimers were satisfactorily confirmed by MAIDI-TOF MS spectrometry, elemental analysis, and NMR spectroscopy. Interestingly, induced circular dichroism (ICD) of the interaction between the diphenyl diselenide core and D-gluconamide periphery of the dendrimer was observed at 300 nm. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. GRAPHICAL ABSTRACT 相似文献
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含苯并噻唑杂环的α-氨基膦酸二苯酯的合成及生物活性 总被引:8,自引:0,他引:8
α氨基膦酸作为氨基酸的含磷类似物,具有广泛的除草[1]、杀菌[2]和植物生长调节活性[3].最近的研究表明,某些α氨基膦酸衍生物还具有较好的抗植物病毒活性[4,5].在研究植物病毒抑制剂的过程中,我们发现含苯并噻唑杂环的α氨基膦酸二乙酯类化合物... 相似文献
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The cyclodextrins(CDs) are a class of cyclic oligosaccharides made up of six(a), seven(a)or more [a-(1,4)-linked] D-glucopyranose units, and shaped like truncated cones with primary and secondary hydroxyl groups crowning the narrower rim and wider rim respectively. As they have a hydrophobic cavity of appropriate dimension, they can bind with various guest moleculars, such as hydrocarbon, cyclohexane, aromatic compounds, to form inclusion complexes. The cyclodextins inclusion complexation has been considered an ideal model mimicking the enzyme-substrate interaction and a lot of effect has been devoted to it. In this paper, we report our investigation on the inclusion complexation behavior of a-cyclodextrin(a-CD) with diphenyl compounds in order to further explore the molecular recongnition mechanism of 2:1 inclusion complexation of a-CD with aromatic compounds.Figure 1: Possible structures of the inclusion compounds.The inclusion complexation behavior of a-CD with sym-diphenyl-urea, sym-diphenyl-thiourea and diphenyl kotone as respective guest moleclars was studied by ultraviolet spectrometric titrations.The absorption spectral changes observed for the compounds in the absence and presence of a-CD are used to draw the corresponding Benesi-Hildebrand plots and caculate the complex stability constant value (Ks) for the inclusion compounds.The 2:1 inclusion complexations show higher binding constants by cooperative binding of one guest molecular in the closely two hydrophobic cyclodextrin cavites as compared with 1:1 inclusion complexations.The highest value observed for sym-diphenyl-urea could be due to the formation of a hydrogen bond between the carbonyl group and the hydrogen in the hydroxyl group of CD and this is not possible with sym-tiphenyl-thiourea. The lowest value observed for diphenyl kotone indicate the hydrophobic interaction is one of the binding force of cyclodextrin inclusion complex. 相似文献
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