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本论文选择1-对氯苯基-3-乙基-5-吡唑酮作为偶合组分,与3-氨基-4-羟基苯磺酰胺重氮组分反应合成偶氮染料母体,合成的母体染料与稀土络合剂反应生成稀土金属络合染料。利用红外光谱、紫外可见吸收光谱对合成的金属络合染料进行了结构鉴定与分析。本论文对络合反应条件进行了详细的研究,合成1∶2偶氮金属络合染料反应体系的pH值在8.0~8.5之间,反应温度75℃,偶氮金属络合染料的收率达90%以上。 相似文献
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本文介绍了C.I.直接紫51的合成及将其脱盐后制成液体纸用染料。用此方法合成的C.I.直接紫51染料溶液,在-5~40℃下保存3年未见析出。 相似文献
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由吸收光谱研究了3,3′-二(丁-磺酸丙基)-9-乙基-4,5,4′,5′-二苯并噻碳菁三乙胺盐(Ⅰ)在DMF-水溶液中生成J-聚集体的效应;直接测量了25℃形成J-聚集体过程的热效应,得到了J-聚集体的聚集热△Hs=—(43±1)×10~3J(表示1摩尔单分子染料连接到J-聚集体上的平均焓变化)。根据Daltrozzo等人将J-聚集体生成当作“结晶”过程的观点,求得该体系中染料I J-聚集体至少包含的染料单分子数n为6。 相似文献
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6-硝基-1,2-重氮氧基萘-4-磺酸与乙萘酚偶合,得偶合物I;2-氨基-4-硝基苯酚-6-磺酸重氮化与1-苯基-3-甲基-5-吡唑啉酮偶合,得到偶合物II;偶合物I与铬明矾在水杨酸存在下络合,得到单络合物III;络合物III再与偶合物II在碱性条件下络合,得到不对称金属络合染料C.I.酸性棕355。 相似文献
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Most of the individual methylolmelamines that occur in melamine–formaldehyde adduct mixtures have been separated by preparative high-performance liquid chromatography (h.p.l.c.) and recovered in amounts sufficient to allow their characterisation by high-field 1H- and 13C-n.m.r. Particular attention has been paid to the chemical shifts of the aromatic azine carbons of the melamine nuclei. These carbon shifts are shown broadly to be in agreement with some values previously published, but additional assignments have been made. It is shown that a satisfactory quantitative analysis of the methylolmelamines in a melamine–formaldehyde adduct mixture can be carried out either by h.p.l.c. or by 13C-n.m.r. 相似文献
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High temperature, high pressure e.s.r. measurements of the hydrogenation reaction of Taiheiyo coal in the presence of catalysts were carried out to understand the stabilization of thermally and/or catalytically induced free radicals. A decrease in free radical concentration with increasing temperature was observed for ZnCl2 and SnCl2 · 2H2O catalysts at 10MPa under hydrogen gas. High pressure modified single-cell d.t.a. and p.d.a. equipment augmented the uniquely designed high temperature, high pressure e.s.r. cell. The hydrogenation reaction was monitored under the same experimental conditions as for e.s.r. From the results of the combination of high temperature, high pressure e.s.r. with high pressure d.t.a. and p.d.a., it was established that H2 molecules can react efficiently with free radicals from coal molecules created by the presence of ZnCl2 and SnCl2 · 2H2O catalysts. 相似文献
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The cycloaliphatic epoxy resins were studied by various two-dimensional nuclear magnetic resonance (2D n.m.r.) spectroscopies. The 13C n.m.r. spectra of the epoxy resins were assigned by using DEPT and 2D INADEQUATE techniques and the 1H n.m.r. spectra were assigned by using 2D 1H---1H and 1H---13C COSY techniques. Complete characterization of the samples synthesized by the oxidation of cyclohexene derivatives not only revealed the existence of the stereochemical isomers resulting from the structural difference of the oxide rings in the samples but also provided the composition ratio of the isomers. 相似文献
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An in-situ radical-quenching experiment was performed in an e.s.r. microwave cavity by using a solution flow system. Diphenylmethyl radicals produced from pyrolysis of 1,1,2,2-tetraphenylethane were quenched by several H-donor solvents. Among the solvents used, indan was the fastest in quenching, followed by hydrophenanthrene, tetralin, mesitylene and cumene in decreasing order of quenching rate. 相似文献
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The 1H and 13C nuclear magnetic resonance (n.m.r.) spectra of a delayed coking feedstock and products, presented in a previous paper, are analysed here in detail by matching results from inspection of both nuclei. The conventional spectra of whole samples are used in combination with elemental analysis data, and substantial agreement is obtained. Differences are explored to yield valuable information. Interpretation of some band assignments is modified to account for new results. This approach results in a detailed quantitative estimation of a few key structures that contain the main functional groups that characterize these petroleum fractions. 相似文献
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E.s.r. spectra of several oil shales from eastern and western USA have been measured at 9 and 25 GHz. The spectra of the western shales were similar to previously reported spectra and consist of a Mn2+ signal and a featureless organic signal. The eastern spectra consist of a V4+ signal and a complex and unusual organic signal consisting of at least four component signals. The organic signal has been characterized in terms of g factor, line-width and saturation characteristics. The effect of oxygen on the signal has also been examined. Electron nuclear double resonance (ENDOR) signals have been obtained from the organic signals of the eastern oil shales. 相似文献
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Akabira coal-derived neutral oil was separated into 25 narrow boiling range fractions covering 183–423 °C, and subsequently separated into compound class fractions : alkanes, monoaromatics, naphthalene-type diaromatics, fluorene-type diaromatics and tri- and/or tetraaromatics, by high performance liquid chromatography (h.p.l.c.). The compound type analyses of the distillate/h.p.l.c. fractions were performed using electron impact mass spectroscopy (e.i.m.s.) or field ionization mass spectroscopy (f.i.m.s.). Aromatic/hydroaromatic compound types and the alkyl side-chain carbon distribution of the distillate/h.p.l.c. fractions were clarified, based on the separation behaviour of h.p.l.c. and the type analyses according to Z value by m.s. By the distillation/h.p.l.c./m.s. method, coal-derived oil was characterized in terms of the distribution of the numbers of aromatic rings, naphthenic rings and carbons of alkyl groups attached to these rings. The variations in chemical structure in a compound class with distillation temperature are discussed in terms of these chemical structural factors. 相似文献
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Saudi Arabian heavy crude oil was separated into six fractions, including five distillate fractions (<93, 93–204, 204–260, 260–343 and 343–454 °C) and a >454 °C distillation residue. Each fraction was analysed by 1H and 13C n.m.r. spectroscopy, and combined gained information from these analyses provided reliable average structural parameters. These included estimation of aliphatic and aromatic content, average paraffinic chain length, and estimation of hydrogen, methyl and alkyl bearing aromatic carbons for each of the six fractions. The extent of branching in paraffinic chains and amount of aromatic bridgehead carbons were also calculated. 相似文献