一种新型仿生化合物四甲基四(1,4-二噻(口英)四氮杂卟啉锰的合成与表征

成功合成了新型化合物2,3-二氰基-5-甲基-1,4-二噻(口英),进一步以其为前驱体用模板反应法合成出四甲基四(1,4-二噻(口英))四氮杂卟啉锰,用紫外-可见光谱、红外光谱、元素分析和X-射线光电子能谱对配合物进行了结构表征.     

一种新型仿生化合物四甲基四(1,4-二噻)四氮杂卟啉锰的合成与表征

成功合成了新型化合物2,3-二氰基-5-甲基-1,4-二噻,进一步以其为前驱体用模板反应法合成出四甲基四(1,4-二噻)四氮杂卟啉锰,用紫外-可见光谱、红外光谱、元素分析和X-射线光电子能谱对配合物进行了结构表征。     

新型仿生分子四酯基四(1,4-二噻英)四氮杂卟啉及其金属配合物的合成与表征

以2,3-二氰基-5-酯基-1,4-二噻英为前驱体、以Mg2+为模板成功地合成了新型仿生化合物四酯基四(1,4-二噻英)四氮杂卟啉镁[MgPz(H3COOC-dtn)4]及其自由配体[H2Pz(H3COOC-dtn)4],用紫外可见光谱、红外光谱、质谱、X-射线光电子能谱对其进行了结构表征。     

一种新型四羧基(1,4-二噻英)四氮杂卟啉镁季铵盐的合成与表征

成功合成了四羧基(1,4-二噻英)四氮杂卟啉镁[MgPz(dtn-COOH)4]及其十六烷基三甲基铵盐[MgPz(dtn-COO-.CTA+)4],并通过紫外可见光谱、红外光谱和荧光光谱对其进行了表征。结果表明,季铵盐的形成很好地改善了四羧基(1,4-二噻英)四氮杂卟啉镁的溶解性能;季铵盐不仅易溶于常见的有机溶剂,还可以很好地溶于不同pH值的水溶液。     

四溴丙基四(1,4-二噻(口英))四氮杂卟啉锌的合成及其性能研究

以镁离子为模板,2,3-二氰基-5-溴丙基-1,4-二噻(口英)为前驱体,成功地合成了四溴丙基四(1,4-二噻(口英))四氮杂卟啉锌,用紫外光谱、红外光谱、元素分析和X-射线光电子能谱对其进行了表征,并将目标化合物负载到树脂上,初步考察了其对苯酚的光催化降解效果.     

三(戊烷氧基)苯-一(1,4-二噻英)四氮杂卟啉的合成

前驱体2,3-二氰基-1,4-二噻英由顺式-1,2-二氰基-1,2-乙二硫钠盐与1,2-二溴乙烷反应生成,前驱体4-戊烷氧基邻苯二腈由正戊醇与4-硝基邻苯二腈反应得到,然后用"镁模板法"合成不对称的三(戊烷氧基)苯-一(1,4-二噻英)四氮杂卟啉,产率为43%。并对其自由配体进行了紫外光谱和Maldi-TOF MS表征。     

四溴丙基四(1,4-二噻)四氮杂卟啉锌的合成及其性能研究

以镁离子为模板,2,3-二氰基-5-溴丙基-1,4-二噻为前驱体,成功地合成了四溴丙基四(1,4-二噻)四氮杂卟啉锌,用紫外光谱、红外光谱、元素分析和X-射线光电子能谱对其进行了表征,并将目标化合物负载到树脂上,初步考察了其对苯酚的光催化降解效果。     

2,5-二亚胺吡咯修饰的四氮杂卟啉的合成

以二甲硫基马来二腈和2,3,5,6-四氰基-1,4-二噻英(TCDT)为前体,采用镁模版法合成了两种2,5-二亚胺基吡咯修饰的低对称含硫四氮杂卟啉,并通过质谱、核磁和紫外光谱表征了相关化合物,由于2,5-二亚胺基吡咯的一种共振结构可与DNA或RNA中腺嘌呤外的碱基以Walson-Click对结合,所以MeS4Pz和MeS6Pz有可能作为光疗药物或生物碱、核苷酸及核酸的传感材料。     

四溴丙基四（1，4-二噻哄）四氮杂卟啉锌的合成及其性能研究

以镁离子为模板,2,3-二氰基-5-溴丙基-1,4-二噻哄为前驱体,成功地合成了四溴丙基四（1,4-二噻哄）四氮杂卟啉锌,用紫外光谱、红外光谱、元素分析和X-射线光电子能谱对其进行了表征,并将目标化合物负载到树脂上,初步考察了其对苯酚的光催化降解效果。     

一步法合成八甲硫基四氮杂钴卟啉研究

为简化金属氮杂卟啉的合成路线,探索合成金属卟啉合成的新路径。我们以顺式-1,2-二氰基-1,2-乙二硫钠盐为原料,与碘甲烷发生取代生成前驱体双甲硫基马来二腈,在1,8-二氮杂二环十一碳-7-烯(DBU)的催化下以醋酸钴为模板一步法成功得到八甲硫基四氮杂钴卟啉,产率达到36%,并以1H-NMR、UV-Vis和MALDI-TOF MS等技术对各步产物进行了表征。     

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.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

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.     

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.     

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。