一些吡啶酮偶氮型分散染料的结构与性能

本文合成了两个系列１４个以吡啶酮衍生物为偶合组份的分散染料，研究了重氮组份及偶合组份上取代基的性质及位置对染料吸收光谱及染色性能的影啊．并对染料的晶型进行了探讨。重氮组份上引入甲氧基有明显的增色效应，重氮组份上偶氮基邻位带有能与踪式结构中亚胺基上形成氢键基团的染料上色性能好。     

一些吡啶酮偶氮型分散染料的结构与性能

本文合成了两个系列１４个以吡啶酮衍生物为偶合组份的分散染料，研究了重氮组份及偶合组份上取代基的性质及位置对染料吸收光谱及染色性能的影响，并对染料的晶型进行了探讨。重氮组份上引入甲氧基有明显的增色效应，重氮组份上偶氮基邻位带有能与腙式结构中亚胺基上形成氢键基团的染料上色性能好。     

影响重氮片影像颜色的因素

本文探讨了重氮片的主要组份——偶合剂、重氮化合物和成膜剂对重氮片颜色的影响。试验结果说明:不同芳核结构的偶合剂以及在重氮盐中引入不同芳核和取代基对重氮片的影像颜色影响较大,另外,重氮片所用的成膜剂对其影像颜色也有影响。     

芳香胺的重氮偶合反应 N-偶合和 C-偶合之间的竞争

作者对芳香胺(过量)与苯胺重氮盐在无水乙腈中的重氮化和偶合反应在三个温度以及不同胺浓度条件下作了研究。N-偶合和 C-偶合反应各自都生成重氮氨基化合物和氨基偶氮化合物。但是,在强碱及Cl存在下,只生成重氮氨基化合物。     

偶氮色淀颜料新的制造工艺

一般制造色淀颜料是将偶合悬浮液用含磺酸基的重氮组份进行偶合,然后用钙盐、钡盐或锰盐处理。Jpn.Kokai Tokkyo Koho 86—09,684报道了新开发了一种简单工艺,将含有色淀化剂的重氮组份悬浮液同时加到反应器中,使偶合反应和色淀化同时一     

分散深蓝HGL偶合中酸度的研究

分散深蓝HGL(C.I.分散蓝79)是我国分散染料中最为量大面广的品种。其合成最后一步为偶合反应,即:可以看出,在偶合反应中,一摩尔重氮组份生成一摩尔硫酸。而重氮组份系在浓硫酸介质中反应而成,大量硫酸进入偶合过程之中。从质量作用定律角度上看,大量硫酸存在阻碍了     

阴离子相转移催化重氮偶合反应的研究

研究了十二烷基苯磺酸钠、十二烷基硫酸钠和十二烷基磺酸钠3种阴离子表面活性剂作为阴离子相转移催化剂时在重氮偶合反应中的催化性能。以咔唑和二苯胺为偶合组分合成了6种新的偶氮化合物。     

石墨冷却器在分散红玉偶合锅中的应用

石墨冷却器在分散红玉偶合锅中的应用谢协朱家乐张益民（苏州染料厂）关键词石墨冷却器偶合锅在分散红玉Ｓ－５ＢＬ的生产过程中，偶合反应温度为１８～２２℃，偶合反应时间为４～５ｈ，偶合介质中的酸是由重氮液带来的，为含Ｈ２ＳＯ４约１０％，含ＨＣｌ约２％。偶合...     

分散藏青2GL的三废治理

一、前言根据一九七五年四月在天津召开的分散藏青2GL 技术鉴定会会议纪要,由石油化工科学研究院组织全国有关单位共同进行这个项目的三废治理攻关会战。分散藏青2GL 的制备包括偶合组份、重氮组份以及染料合成三部分。偶合组份的合成是以对-氨基苯甲醚为原料,经过酰化、硝化、还原、羟乙基化、酯化五步反应。重氮组份     

相转移催化重氮偶合反应的研究

前言偶氮染料不论是在品种上,还是在产量上都是最大的一类染料,而重氮偶合反应对于芳香族偶氮化合物的制备具有十分重要的意义。在目前常用的重氮偶合反应工艺条件下,有的反应速度慢、产率低,有的反应几乎不能进行;有的反应所得染料含杂质较多,影响了染料的产品质量,也给开发新产品带来很大困     

负性重氮胶片中醚类封闭偶合剂的解封和成像机理的研究

本文通过ＧＣ／ＭＳ谱分析研究了重氮负性胶片中醚类封闭偶合剂的解封历程。测定了二种胶片的紫外－可见吸收光谱。讨论了感光特性曲线。结果表明在重氮负片成像过程中使用封闭偶合剂ＭＥＭ－α－萘醚的重氮胶片由酸催化解封主要是分子内重排。而使用叔丁基－α－萘醚的胶片由酸催化解封主要是脱除保护基的断裂产物。二种胶片相比，前者的感光度比较高，而且它的图像片中染料的吸收峰向长波移动。     

偶氮染料的光敏性研究

合成了单偶氮蒽醌、双偶氮蒽醌和双偶氮芴酮三个系列偶氮染料,并以此制成了功能分离型双层光电导体。蒽醌类单偶氮染料扩大取代基的共轭体系,可以提高光敏值,最大可由Ix.S2800提高到Ix.S62,含-NO_2的染料光敏性最高,最低为-OCH_3。蒽醌双偶氮类染料取代基对光敏性的影响与蒽醌单偶氮类染料相同,前者的光敏性高于取代基相同的后者。取代基对芴类双偶氮染料光敏性的影响与前两类不同,含-Cl取代时光敏性最高,含-NO_2最低。染料的光敏性排序为:芴酮类>双偶氮蒽醌类>单偶氮蒽醌类。     

Synthesis and Electronic Spectra of some 4–Aminoazobenzenes

The synthesis of a range of monoazo disperse dyes prepared from monosubstituted anilines as the diazo components is reported The absorption maxima of the dyes are recorded, and shifts resulting from the effect of different substituents in both the diazo component and the coupling component are correlated with the nature of the substituent. The use of monosubstituted aniline; as diazo components, coupled to different TV–substituted anilines, can result in dyes with λD_max differing by about 100 nm.     

C.I颜料红57∶1合成条件和改性的研究

讨论了合成条件、添加剂和化学结构对颜料红 5 7∶1性能的影响。结果表明 :合成颜料红 5 7∶1的较好工艺条件为 :顺式重氮化 ,氯化钙加入重氮盐中 ;顺式偶合 ,pH值为 8左右 ,时间为 10min ,保温温度 90℃ ,产品在 80℃下干燥 15h。添加改性剂颜料的流动度均增加 ;添加S 松香、CH M 8、DDA 18颜料色光偏兰 ;添加CH M 8、DDA 18、CH 2C颜料润湿角有较大增加 ,亲油性增强 ;添加S 松香、CH 2C颜料的透明性较好。颜料颜色的深浅和λmax与苯环上取代基的性质、位置密切相关。这些结论对提高颜料红的质量和开发新品种均有一定的参考价值。     

Iridium‐ and Rhodium‐Catalyzed Carbocyclization between 2‐Phenylimidazo[1,2‐a]pyridine and α‐Diazo Esters

Iridium(III) and rhodium(III) complexes can catalyze the carbocyclization between 2‐phenylimidazo[1,2‐a]pyridine and α‐diazo esters. The reaction occurs via C H activation and dialkylation of the arene followed by intramolecular nucleophilic substitution. Iridium(III) and rhodium(III) catalysis offer complementary scopes with respect to the α‐diazo esters.

     

Synthesis of α‐Diazo Carbonyl Compounds with the Shelf‐Stable Diazo Transfer Reagent Nonafluorobutanesulfonyl Azide

Nonafluorobutanesulfonyl azide is a shelf‐stable, cost‐effective and general diazo transfer reagent for the efficient synthesis of α‐diazo carbonyl compounds in excellent yields and in very short reaction times, under mild conditions. The diazo products can be readily isolated in pure form after a simple aqueous extractive work‐up that avoids chromatographic purification in most cases. Because of its high efficiency and wide substrate scope, shelf‐stability, relatively low cost, and ease of product purification, nonafluorobutanesulfonyl azide offers an advantageous alternative to other commonly used diazo transfer reagents.     

The Cremeomycin Biosynthetic Gene Cluster Encodes a Pathway for Diazo Formation

Diazo groups are found in a range of natural products that possess potent biological activities. Despite longstanding interest in these metabolites, diazo group biosynthesis is not well understood, in part because of difficulties in identifying specific genes linked to diazo formation. Here we describe the discovery of the gene cluster that produces the o‐diazoquinone natural product cremeomycin and its heterologous expression in Streptomyces lividans. We used stable isotope feeding experiments and in vitro characterization of biosynthetic enzymes to decipher the order of events in this pathway and establish that diazo construction involves late‐stage N?N bond formation. This work represents the first successful production of a diazo‐containing metabolite in a heterologous host, experimentally linking a set of genes with diazo formation.     

银漂色位移染料性能的研究

本文对几种银漂染料的色位移和复色性能与其分子结构的关系进行了研究。结果显示,以N-苯甲酰化J-酸、G-酸、变色酸为偶合组分的染料具有较好的位移和复色性能,而以R-酸、N-酰化H-酸等为偶合组分的银漂染料性能较差。位移染料M-16、C-20的初步涂布应用表明,其样片感光度分别提高了3.8和6.3倍。     

Synthesis and properties of some novel pyrazolone-based heterocyclic azo disperse dyes containing a fluorosulfonyl group

A series of heteroarylazo disperse dyes derived from pyrazolones and fluorosulfonyl anilines were synthesized, and their thermal and spectral properties were investigated with respect to the effect of substituents on absorption spectra, halochromism, and solvatochromism. Heteroarylazo disperse dyes, which contain a nitro group instead of a fluorosulfonyl group para to the azo group in the diazo component, were also synthesized for comparative purpose. The fluorosulfonylarylazopyrazolone dyes had absorption maxima at shorter wavelength and showed lower extinction coefficients than the nitroarylazopyrazolone dyes. The synthesized dyes also exhibited positive halochromism and solvatochromism, so the absorption bands of the dyes moved toward longer wavelengths as the acidity or polarity of the solvent increased. 4-Fluorosulfonyl-substituted dyes generally showed lower thermal stability than their 4-nitro-substituted analogs, because the lower electron-withdrawing power in the diazo components tended to decrease the polarizability and dipole interactions.     

Sabatier效应机理的研究

通过对核壳乳剂以及均质乳剂潜影分布和sabatier效应的研究,提出了产生Sabatier效应的可能机理:第一次曝光产生的表面潜影吸附了显影剂负离子以后变成空穴捕获中心而在第二次曝光时被漂白造成影像反转;卤化银颗粒上必须同时有足够的表面敏化中心和足够的内部敏化中心,两者应相匹配。利用这个机理可以解释许多有关Sabatier效应的实验现象。