取代二苯胺重氮盐、重氮树脂合成及光、热分解性质

二苯胺型重氮树脂是阴图PS版最重要的感光剂^[1],关于它的应用已有许多专利^{[2 5]}.作为一种预涂感光版,阴图PS版的贮存期要求在一年以上,从而对作为感光剂的重氮树脂的热稳定性有较高的要求,希望其热分解温度尽量高一些并能在潮热气候下性质稳定.一般来说,二苯胺重氮盐的苯环上带取代基时,有利这些性质的改善,如3-甲氧基二苯胺-4-重氮盐树脂就是一个例子,它已获得广泛的应用^[6,7].     

N-甲基二苯胺-4-重氮盐制备及性质

二苯胺重氮盐(C₆H₅NHC₆H₄N₂⁺ X^-)与甲醛的缩合物重氮树脂,在光照下易与带侧链羟基的线型高分子形成亲墨性好的交联产物,被广泛用于阴图PS版的制备^{[1 5]}。用于PS版感光剂,最重要的一项性能是热稳定性要好,即制备重氮树脂用的重氮盐热分解温度要高,热分解速度要慢。     

2-磺酸基二苯胺-4-重氮盐制备及其光、热分解性质

二苯胺重氮盐由于每个分子中有二个苯环,其中末键连重氮基的苯环可与甲醛在酸性介质中发生缩聚反应^[1~3],形成的重氮树脂具有良好的感光性能,并可溶于有机溶剂或碱性显影液,极适合于制备感光胶印版,已发展成为阴图PS版最重要的感光剂^[4~7].     

二苯胺重氮树脂在不同溶剂中的分解动力学

非银盐感光材料不但可以用于成像过程 ,而且还在印刷油墨、光敏抗蚀、涂料、粘合剂等方面得到应用。二苯胺重氮树脂是阴图 PS版最重要的感光剂 [1] ,关于它的应用已有许多报道 [2～ 7]和专利 [8,9]。作为一种预图感光版 ,要求感光性能好 ,储存期在一年以上。重氮化合物一般都亲水并存在暗反应 (即热反应 ) ,用它制成的 PS版易受温度和湿度的影响。二苯胺重氮盐在乙醇中的光、热分解文献已有报道 [10 ] ,但作为感光材料的二苯胺重氮树脂在水、乙醇 -水、甲醇 -水溶剂中的光、热分解动力学研究尚无报道。本文用分光光度法对二苯胺重氮树脂在…     

邻偶氮萘醌磺酸基为负离子的二苯胺—4—重氮盐：———甲醛树脂的制备与性质

二苯胺－４－重氮盐与邻偶氮萘醌磺酸酯均具有很高的光敏性，分别是阴图型和阳图型预涂感光印刷版（ＰＳ版）的感光剂，用它们制备阴图型和阳图型ＰＳ版已有很多专利报道．重氮基与邻偶氮萘醌基的光分解分属两种类型，前者的中间体为自由基或正离子［１，２］，后者为碳卡...     

3-甲氧基二苯胺-4-重氮盐的制备及其光、热分解性质

３－甲氧基二苯胺－４－重氮盐（ＭＤＤＳ）与甲醛或４,４－二甲氧次甲基二苯醚的缩合物用作阴图ＰＳ版感光剂,Ｈｏｅｃｈｓｔ等公司［１～５］已有很多专利．可能是出于商业利益,关于ＭＤＤＳ的制备方法未见报道．我们［６］从苯胺钾与３－甲氧基氯苯出发,制备了这...     

取代二苯胺重氮盐及重氮树脂

性介质下与甲醛等缩合生成重氮树脂,从而是制备负性PS版的重要材料。但从二苯胺重氮盐直接制备的重氮树脂和感光印刷版的储存性能不好,难于形成商品。     

有机负离子重氮树脂

重氮树脂作为阴图ＰＳ版的感光剂已有很多专利［１～４］．它是由二苯胺－４－重氮盐或取代二苯胺－４－重氮盐与多聚甲醛在浓硫酸中缩聚制得，由于耐候性与亲油墨性差，实际应用时，需将ＨＳＯ－４转换为有机负离子，如与十二烷基苯磺酸钠反应，但常导致热分解温度（Ｔｄ...     

预涂感光印刷版

阳图ＰＳ版和阴图ＰＳ版，分别属光分解和光交联型。阳图ＰＳ版在我国已广泛应用，而阴图ＰＳ版处起步阶段。由取代二苯胺重氮树脂制备的阴图ＰＳ版热稳定性好，贮存期长。     

酸酐改性PVA树脂用于阴图PS版成膜树脂的性能研究

聚乙烯醇(PVA)首先与丁醛进行缩醛反应,再与酸酐进行酯化反应合成了酸酐改性PVA树脂.将此树脂与进口重氮树脂、染料和有机溶剂以一定比例混合形成了阴图PS版感光胶.本文研究了B/P以及酸酐改性PVA树脂的分子量、缩醛度、酯化度等因素对阴图PS版成像性能的影响.结果表明酸酐改性PVA树脂对阴图PS版的显影性能,亲油墨性和耐磨性都起关键作用,对阴图PS版的感度和保存稳定性也有一定影响.因此其分子量、酯化度和缩醛度的确定,必须综合考虑各项性能之间的平衡.缩醛度为60-80 mol%,酯化度10-15mol%,羟基5-25 mol%,分子量约为4-8万,B/P为4-4.5时,制得的阴图PS版的感度、显影性、着墨性和耐磨性都较好.     

光敏性聚电解质重氮树脂及其自组装

二苯胺－4－重氮盐与甲醛的缩合产物是一种正离子性光敏性聚电解质重氮树脂，本文主要结合我们自己的研究工作，对重氮树脂的性质尤其是它的光、热反应，与阴离子表面活性剂所形成复合物性质，及基于这种带重氮基的光敏物质的各自组装进行了比较详细的介绍，并简要介绍了光敏性自组装超薄膜的应用。     

Transformations of 3-alkyl-4-(methoxyphenyl)-1<Emphasis Type="Italic">H</Emphasis>-pyrazole-5-diazonium salts

The coupling of 3-alkyl-4-(methoxyphenyl)-1H-pyrazole-5-diazonium salts with acetylacetone followed by cyclization of the formed heterylhydrazones resulted in pyrazolo[5,1-c][1,2,4]triazines. The 4-(3,4-dimethoxyphenyl)-3-methyl-1H-pyrazole-5-diazonium salt was not involved into a similar reaction but suffered an intramolecular azo coupling giving pyrazolo[3,4-c]-cinnoline.     

Interaction of Diphenylamine Diazonium Salt with Sodium Dodecyl Sulfate in Aqueous Solution

The interaction of diphenylamine-4-diazonium salt (DDS) with sodium dodecyl sulfate (SDS) in aqueous solution was investigated. The results show that in a 2.1-2.3 molar ratio of SDS/DDS, the solution viscosity increases suddenly to a thousand times the original and then drops rapidly as the ratio beyond the region. The dramatic increase in the viscosity was proposed to be due to aggregated micelles that form in solution due to the interaction of diphenylamine diazonium salt and micelles formed from SDS, and when further SDS was added drops rapidly, because the aggregated micelles were separated by the electrostatic repulsion force originated from the overfeeding of SDS. It is interesting that the viscosity of the solution is very susceptible to UV light, i.e., the increased viscosity decreases gradually when the solution was exposed under UV light because the irradiation decomposes the diazonium group. The influence of [SDS] and the ratio of SDS/DDS on the viscosity of the solution were also investigated. Copyright 1999 Academic Press.     

Attempted syntheses of aminofluorothiophenes

It appeared that a key intermediate for 2-amino-3-fluorothiophene ( 1 ), methyl 3-fluorothiophene-2-carboxylate ( 5 ), had been prepared by a Schiemann reaction of the 3-diazonium salt ( 6 ) in xylenes. This report was not correct. Gomberg coupling products 7 with o-xylene are actually formed. We were able to prepare 5 by using special conditions for the Schiemann reaction. The hydrazide derivative of 5 failed to give 1 under Curtius reaction conditions. Two new acetamidofluorothiophene compounds were prepared using Selectfluor^TM as the fluorinating agent, but no aminofluorothiophenes 1-3 or salts could be obtained by acidic hydrolysis of either amide.     

新型锍鎓盐类光生酸剂的合成及产酸性能研究

成功合成了两种新型锍鎓盐类光生酸剂,其结构经¹1HNMR和MS分析确认,并对其基本物性及在405、365nm光下乙腈溶液中的分解及产酸性能进行了研究,通过计算得出了分解及产酸量子产率.结果表明,两种化合物有较高的热分解温度和在常用有机溶剂中有较好的溶解性;在405nm光源下,4-(9′-苯基蒽基)苯基三氟甲磺酸锍鎓盐(PAGS1)和4-(4′-N,N-二乙基-1′-苯乙烯基)苯基三氟甲磺酸锍鎓盐(PAGS2)的分解量子产率分别为10%和15%,产酸量子产率为8.1%和13%;但在365nm光源下,分解及产酸量子产率均很低,说明两种光生酸剂对于405nm波长的光较敏感,适宜作为405nm光源下的光生酸剂.     

Inclusion Complexation of Diphenylamine-4-diazonium Chloride and p-Sulfonatocalix[4]arene

Inclusion complexation of p-sulfonatocalix[4]arene (SC4A) and diphenylamine-4-diazonium chloride (DDC) in aqueous solution was investigated in this study. The inclusion of DDC in the cavity of SC4A leads to ¹H NMR chemical shifts of DDC moving towards higher magnetic field. The complexation of SC4A also results in a bathochromic shift and a decrease in optic intensity of the absorption spectrum of DDC. In the presence of SC4A, the thermal stability of DDC in aqueous solution increases significantly while its photosensitivity still remains high.