酰基吡唑酮缩氨基硫脲Cu(Ⅱ)、Ag(Ⅰ)配合物的合成及表征

合成了含硫席夫碱试剂1-苯基-3-甲基-4-(α-呋喃甲酰基)吡唑啉酮-5缩氨基硫脲(L)及其铜,银的配合物。元素分析及摩尔电导值表明新配合物的组成为[CuL2]·4H2O,[AgL]NO3·C2H5OH。通过红外光谱、紫外光谱、差热-热重对配合物进行表征。     

香草醛缩丙二胺Schiff碱与Zn(Ⅱ),Co(Ⅱ)配合物的合成及表征

以乙醇为溶剂合成了香草醛缩丙二胺席夫碱(HL,C19H20N2O4)和Zn(II)、Co(II)配合物[Zn L2Cl2]·4H2O、[Co L2Cl2]·5H2O,利用红外光谱、紫外光谱、热重分析、元素分析及摩尔电导等方法对配合物的组成和结构进行了表征。     

环状双核Cu(Ⅱ)配合物的合成与性质

为了测试特定结构Cu(Ⅱ)配合物的抑菌活性和其他性能,以甲基丙二酸、4,4'-二氨基二苯甲烷、4,4'-二氨基二苯醚为配体制备了两种未见报道的环状双核配合物[Cu(mmal)(Dadm)(H2O)]2·4H2O和[Cu(mmal)(ODA)(H2O)]2·4H2O。通过元素分析和电子自旋共振推断配合物的组成及结构;测试了往配体溶液中加入Cu(Ⅱ)离子和其他过渡金属离子的紫外-可见光谱;对配合物的抑菌性能进行初步研究。结果表明,配体能选择性地结合Cu(Ⅱ)离子,所合成的配合物对大肠杆菌、枯草杆菌、假单孢杆菌的抑菌效果与原料试剂相当,抑菌效果不明显。     

PMNAP缩2-氨基苯并噻唑席夫碱及其过渡金属配合物的合成与抑菌活性

在非水溶剂中合成出一种未见报道的新型席夫碱试剂(HL):1-苯基-3-甲基4-萘乙酰基-吡唑啉酮-5(PMNAP)缩2-氨基苯并噻唑及其4种过渡金属配合物.由元素分析、化学方法、质谱和摩尔电导值推测出配合物的组成为ML·H2O[M=Cu2+、Pb2+、Ni2+、Zn2+],通过红外光谱、紫外光谱、热重谱和核磁共振氢谱等手段对配体和配合物进行了结构表征并做了初步的抑菌活性实验.表征结果显示:配体在测试条件下以酮式和烯醇式结构共存,配位时酮式可能转化为烯醇式结构按去质子的方式以1分子吡唑啉酮环羟基和1分子H2O上的两个0原子以及亚胺基和苯并噻唑环上的两个N原子与过渡金属中心离子成键,配合物的配位数为4;抑菌实验结果表明:配合物比配体对枯草杆菌、大肠杆菌、酵母菌和金黄色葡萄球菌具有更强的抑制作用.     

菲醌-甘氨酸希夫碱金属配合物的合成与性能研究

以菲醌与甘氨酸为原料合成相应甘氨酸席夫碱配体(L),与过渡金属盐反应得到两种金属配合物[Cu(L)(H_2O)_2]·2H_2O(a)、[Zn(L)(H_2O)]·2H_2O)(b),通过红外光谱、紫外光谱、元素分析等对产物进行表征,探究了配体及其金属配合物对大肠杆菌的抑菌活性。结果表明:只有在以甲醇为溶剂的情况下得到了晶体配合物;配体和配合物L、[Cu(L)(H_2O)_2]·2H_2O、[Zn(L)(H_2O)]·2H_2O对大肠杆菌都有一定的抑制作用。     

一种平面Pd(Ⅱ)配合物的合成结构以及光催化性质的研究

配合物[Pd(dmphen)CO3]·H2O(dmphen是2,9-二甲基-1,10-菲咯啉)已合成和表征。钯配合物是采用水热合成法制备的,利用X射线单晶衍射法、元素分析、红外等方法对其进行表征。本文以亚甲基蓝(MB)为探针进行了光催化反应对其进行降解,测评了[Pd(dmphen)CO3]·H2O配合物的光催化降解活性。结果表明,在300 W氙灯光源照射下,该配合物对亚甲基蓝光的催化降解有一定效果,亚甲基蓝(MB)的光催化降解率由时间和Pd配合物的参与共同决定。     

铒-对甲苯磺酰组氨酸-邻菲啰啉三元配合物的合成及其抑菌活性

以对甲苯磺酰组氨酸,邻菲啰啉和氯化饵为原料合成了一种新型稀土三元固体配合物。利用配位滴定,元素分析,紫外光谱(UV),红外光谱(IR),热重分析(TG-DTG)等分析手段对配合物进行了表征,推测其结构为[Er(N-Ts-L-His)3Phen]Cl3·2H2O。通过抑菌实验对配合物及配体的抑菌活性进行了研究,初步结果表明,配合物有较好的抑菌效果,并且明显强于配体的抑菌性质。     

基于1,4-二(2-吡啶基)甲氧基苯的配合物的制备及其催化过氧化氢降解活性蓝19的性能研究

文章以1,4-二(2-吡啶基)甲氧基苯(L)为配体与过渡金属盐Mn Cl2 4 H2O反应制备了配合物[Mn Cl2-L]0.5 H2O,并通过核磁和元素分析对它们进行了结构表征,同时探讨了配合物的催化性能。研究结果表明配合物能够催化过氧化氢氧化降解活性蓝19染料,系统研究了配合物用量、p H、温度等对催化活性的影响,发现配合物[Mn Cl2-L]·0.5 H2O优异的催化脱色性能,在废水处理方面具有广阔的应用前景。     

3,4-二羧基吡啶-邻菲罗啉-钴三元配合物的合成与表征

具有共轭体系的吡啶基羧酸是一类重要的有机配体,其过渡金属配合物在酶模拟、医药、催化和磁性等功能材料等方面均具有潜在的应用前景.将硝酸钴、邻菲罗啉(Phen)和3,4-二羧基吡啶(Pydc)按1∶2∶1物质的量比计量,在pH=5和50-60 ℃加热搅拌的条件下,在甲醇溶液中合成了钴(Ⅲ)的三元配合物,用元素分析、红外光谱、紫外光谱、热重分析和摩尔电导率对配合物进行表征,结果表明该配合物为1∶1型电解质,其组成为[CoⅢ(Pydc)(phen)2]NO3·H2O,其中Pydc=C7H3O4N.     

室温固相法合成席夫碱钍(Ⅳ)金属配合物

以水杨醛或邻香草醛、2,6-二氨基吡啶和硝酸钍为原料,采用室温固相法合成了2,6-二氨基吡啶双席夫碱钍(Ⅳ)配合物[ThL1(NO3)2](NO3)2.H2O,[ThL2(NO3)2](NO3)2.H2O。通过元素分析、EDTA滴定法、红外光谱、紫外光谱、热分析方法对配合物的组成和结构进行了表征。结果表明,金属钍与席夫碱配体中的亚氨基上的氮原子、酚氧基上的氧原子以及硝酸根离子形成了配位数为8的配合物。配合物的热分解过程包括失水、配体的氧化分解和氧化为氧化钍。     

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。