一种具有荧光的三聚氯氰衍生物的合成与表征

用三聚氯氰(CNC)和6-(2-氨基乙胺基)-2-丁基-苯并[de]异喹啉-1,3-二酮(EBNP)为原料,合成了一种具有强烈荧光的三聚氯氰衍生物:2-丁基-6-〔2-(4,6-二氯-1,3,5-三嗪基-2-氨基)乙胺基〕-苯并[de]异喹啉-1,3-二酮(CBNT)。优化的条件为:以无水四氢呋喃(THF)为溶剂,以N,N-2-异丙基乙胺(DIPEA)为碱,n(EBNP)∶n(CNC)∶n(DIPEA)=1∶1∶1,EBNP的四氢呋喃溶液的滴加速度为1 mL/min,反应温度0~5℃,反应时间4 h,目标产物产率可达97.5%。用元素分析、核磁共振、质谱、红外光谱对目标产物的结构进行了表征。考察了其紫外可见吸收和荧光发射光谱。与EBNP相比,目标产物的摩尔消光系数增大了1.01倍,最大荧光强度增强了66.8%。目标产物的荧光性能受溶剂影响。     

新型不对称结构荧光增白剂的合成及其性能

用4-硝基-4′-氨基二苯乙烯-2,2′-二磺酸替代4,4′-二氨基二苯乙烯-2,2′-二磺酸,与三聚氯氰和氨基化合物经过四步缩合得到2个新型不对称结构和用作参比的3个传统对称结构荧光分子。对比研究这两类增白剂在水溶液中的紫外吸收、荧光发射、光致异构化现象及其应用性能。结果显示不对称结构增白剂紫外吸收和染色性能提高,但其荧光发射性能下降,且同样存在较为明显的光致异构化现象,耐光性也较差。     

三聚氯氰合成中氯化反应器的数学模型及其计算

1　前言三聚氯氰 ,化学名 2 ,4,6-三氯 - 1 ,3,5-三嗪 ,分子式Ｃ3Ｎ2 Ｃｌ3或 (ＣＮＣｌ) 3[1 ] 。三聚氯氰的均三嗪环相当稳定 ,只有在浓硫酸中加热到 1 50℃以上才能分解 ,但其三个氯原子受Ｃ =Ｎ不饱和键的影响活性增强 ,容易反应。同时 ,三个氯原子的活性又相当大 ,可以分阶段地被氨基、羟基、巯基等置换 ,从而形成许多有用的含均三嗪衍生物。因此 ,三聚氯氰是一种重要的有机化工中间体 ,广泛用于染料、农药、助剂、医药等领域[2 ] 。三聚氯氰的生产方法是由氯氰的制备和氯氰聚合两个过程组成[1 ,3] ,即 :ＨＣＮ Ｃｌ2　　ＣＮＣｌ Ｈ…     

三聚氯氰在荧光增白剂工业中的应用与展望

介绍用三聚氯氰合成的荧光增白剂,按其母体结构类型可分为以下几种:双三嗪氨基二苯乙烯类型、含三嗪基的香豆素类型、三嗪基芘类型、4-酰氨基-4’-三嗪氨基二苯乙烯类型。同时,简述了上述荧光增白剂的典型合成工艺及其主要用途。并预测今后十年内三聚氯氰在荧光增白剂中的消耗量仍以年均6%左右的速率递增。     

树枝状大分子PAMAM—FBs合成及其在洗涤剂中的应用

三聚氯氰与4,4'-二氨基二苯乙烯-2,2'-二磺酸和2种氨基化合物经过三步缩合反应可得到三嗪基氨基二苯乙烯型荧光增白剂,作者用聚酰胺-胺G1.0(PAMAM)代替其中一种氨基化合物,合成聚酰胺-胺改性高分子荧光增白剂(PAMAM-FBs).实验显示,添加PAMAM-FBs的洗涤剂,增白性能以及耐光性均得到明显改善.确定了PAMAM-Ftks在液体洗涤剂中的适宜用量.     

聚乙烯醇改性荧光增白剂的制备及其在洗涤剂中的应用

三聚氯氰与4,4'-二氨基二苯乙烯-2,2'-二磺酸和2种氨基化合物经过三步缩合反应可得到三嗪基氨基二苯乙烯型荧光增白剂,本文用聚乙烯醇(PVA)代替其中一种氨基化合物,合成聚乙烯醇改性高分子荧光增白剂(PVA-FBs).实验显示,添加了PVA-FBs的洗涤剂增白性能以及耐光性均得到明显改善.确定了PVA-FBs在液体洗涤剂中的适宜用量.     

2-甲氧基-4,6-二氯-1,3,5-三嗪的合成工艺优化

三聚氯氰与甲醇发生SN2亲核取代反应,得到2-甲氧基-4,6-二氯-1,3,5-三嗪。通过采用正交试验,优化缚酸剂种类、缚酸剂用量、反应温度、反应时间等反应条件,确定了合成三聚氯氰甲氧基单取代产品的优化工艺为:以NaHCO3为缚酸剂、反应温度8~10℃、反应时间5h、三聚氯氰与缚酸剂物质的量之比为1∶1,目标产物的收率为84.4%。     

含酰胺基DSD酸-三嗪型荧光增白剂的合成与性能研究

以三聚氯氰、DSD酸(4,4'-二氨基二苯乙烯-二磺酸)和氨基化合物为原料,经过三步缩合反应得到一系列新型的酰胺基DSD酸-三嗪型荧光增白剂.对所得目标化合物进行了红外光谱、紫外可见光谱和荧光发射光谱等结构表征,同时对滤纸、棉布和麻布进行了增白性能检测.结果表明:化合物7a ～71对滤纸、棉布和麻布具有明显的增白效果,特别是对滤纸的增白效果更佳.     

聚苯乙烯三聚氯氰功能化树脂的制备

聚苯乙烯乙二胺树脂(PS-EDA-NH2)和三聚氯氰进行取代反应,制备得到聚苯乙烯三聚氯氰树脂(PS-EDA-C3N3Cl2)。通过优化溶胀时间、反应时间、温度、缚酸剂和pH等反应条件,得出最优反应条件为:聚苯乙烯乙二胺树脂与三聚氯氰的摩尔比为1:1.2,反应时间2h,温度0～5℃,缚酸剂为Na2CO3,聚苯乙烯乙二胺树脂与缚酸剂的摩尔比为1:1,在反应30min后,先控制反应体系pH为弱酸性(pH=3～4),再控制pH为中性(pH=6～7)。反应增重率为27.5%,胺基转化率为61.1%,表面有活性的氯原子达123.2%。制备的三聚氯氰树脂可以作为一个活性中间体,进一步衍生化制备多种功能介质。     

三聚氯氰供需基本平衡

业内人士预计,2000年我国三聚氯氰产量将达到2.5万t,供需基本平衡。 国内三聚氯氰主要用于生产染料、荧光增白剂和农药均三嗪类除草剂。国内生产直接染料需三聚氯氰2000t/a。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料，介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比，介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序，对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

Inorganic/organic nanocomposite coatings: The next step in coating performance

Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled. An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible. UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Some Large Wood-Boring Beetles in Southeastern USA

Ethanol and α-pinene were tested as attractants for large wood-boring pine beetles in Alabama, Florida, Georgia, North Carolina, and South Carolina in 2002–2004. Multiple-funnel traps baited with (−)-α-pinene (released at about 2 g/d at 25–28°C) were attractive to the following Cerambycidae: Acanthocinus nodosus, A. obsoletus, Arhopalus rusticus nubilus, Asemum striatum, Monochamus titillator, Prionus pocularis, Xylotrechus integer, and X. sagittatus sagittatus. Buprestis lineata (Buprestidae), Alaus myops (Elateridae), and Hylobius pales and Pachylobius picivorus (Curculionidae) were also attracted to traps baited with (−)-α-pinene. In many locations, ethanol synergized attraction of the cerambycids Acanthocinus nodosus, A. obsoletus, Arhopalus r. nubilus, Monochamus titillator, and Xylotrechus s. sagittatus (but not Asemum striatum, Prionus pocularis, or Xylotrechus integer) to traps baited with (−)-α-pinene. Similarly, attraction of Alaus myops, Hylobius pales, and Pachylobius picivorus (but not Buprestis lineata) to traps baited with (−)-α-pinene was synergized by ethanol. These results provide support for the use of traps baited with ethanol and (−)-α-pinene to detect and monitor common large wood-boring beetles from the southeastern region of the USA at ports-of-entry in other countries, as well as forested areas in the USA.