单核镍(Ⅱ)配合物的合成、表征和性质

报道了配体N ,N—二 (2—苯并咪唑甲基 )亚胺 (简写为IDB)及含镍 (Ⅱ )单核配合物 [Ni(IDB) 2 ]·Cl2 ·2CH3CH2 OH·2H2 O(Ⅰ )的合成 ,对 (Ⅰ )进行了元素分析、摩尔电导、紫外—可见光谱、红外光谱、自旋共振谱和循环伏安研究。推测配合物 (Ⅰ )的中心离子镍 (Ⅱ )为六配位八面体结构。     

四元混配配合物[Ln(x-MBA)2(NO3)(Phen)]2的合成及表征

在酸性介质,乙醇/水混合溶剂中合成得到了三个系列的四元混配配合物[Ln(x-MBA)2(NO3)(Phen)]2(Ln=La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Er;MBA=CH3C6H4COO-).用元素分析、IR、UV、DTA-TG和1HNMR等方法对配合物进行了表征,测量了三个Eu配合物的荧光光谱和三个Gd配合物的ESR谱.     

单核镍配合物Ni(IDB)2(CH2 COO)Cl·2H2 O的合成、表征和性质

报道含三齿配体N,N-二(2-苯并咪唑亚甲基)胺(简写为IDB)的单核镍配合物Ni(IDB)2(CH2COO)C1．2H2O(Ⅰ)的合成。对(Ⅰ)进行了元素分析、摩尔电导、紫外——可见光谱、红外光谱、自旋共振谱和循环伏安研究。推测配合物中镍离子(Ⅱ)为六配位的八面体结构。该配合物或许可作为脲酶的模型化合物。     

四元混配配合物[Ln(x-MBA)2(NO3)(Phen)]2的合成及表征

在酸性介质,乙醇／水混合溶剂中合成得到了三个系列的四元混配配合物[Ln(x-MBA)2(NO3)(Phen)]2(Ln=La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Er;MBA=CH3C6H4COO^-）。用元素分析、IR、UV、DTA－TG和^1H NMR等方法对配合物进行了表征,测量了三个Eu配合物的荧光光谱和三个Gd配合物的ESR谱。     

3-甲基-1-苯基-5-吡唑酮锌(II)配合物的合成及性质研究

3-甲基-1-苯基-5-吡唑酮(HMPP)与醋酸锌反应得到配合物[Zn2(MPP)2(CH3COO)2]·H2O。通过元素分析、红外光谱、核磁共振氢谱、热重-差热和扫描电镜对配合物的组成和结构进行了表征。用循环伏安法考察了该配合物的电化学行为,发现其电子转移是准可逆的。通过紫外光谱法研究了它与牛血清白蛋白的相互作用,发现二者通过氢键、van der Waals力结合。该配合物对Pb2+的吸附测试结果表明,在40 min内,配合物对25mg/L的Pb2+的吸附去除率达99.74%。     

氢氧根钌配合物的合成及其对乙腈的催化水化研究

利用三乙胺对配合物[TpRu(PPh3)2(H2O)]BF4脱质子化合成了氢氧根钌配合物TpRu(PPh3)2(OH),并研究了TpRu(PPh3)2(OH)催化水化乙腈的反应.机理研究表明,催化循环的关键中间体为氧配位的酰亚胺配合物TpRu(PPh3)(CH3CN)(OCMe=NH),经过生成TpRu(PPh3)(κ2-N,O-NH=CMeN=CMeO)、水亲核进攻开环生成TpRu(PPh3)(NH=C(OH)Me)(OCMe=NH)、乙腈取代其NH=C(OH)Me配体产生乙酰胺、同时生成TpRu(PPh3)(CH3CN)(OCMe=NH)完成催化循环.     

含镍配合物[Ni(IDB)2](CH3COO)·ClO4·4H2O的合成、表征和性质

报道含三齿配体N,N-二(2-苯并眯唑甲基)亚胺的单核镍配合物[Ni(IDB)2](CH3COO)·ClO4·4H2O的合成.并进行了元素分析、摩尔电导、紫外-可见光谱、红外光谱、自旋共振谱和循环伏安研究.推测配合物中镍离子(Ⅱ)为六配位的八面体结构,该配合物或许可作为脲酶的模型化合物.     

稀土钐二元、三元配合物的合成、表征及其生物活性研究

以氯化钐、2-氨基嘧啶和钼酸钠为原料,制备了两种新型稀土钐二元、三元配合物,通过元素分析、紫外光谱、红外光谱等手段对其进行了表征,确定了二元配合物的化学组成为Sm2(AP)(H2O)2Cl3(AP=2-氨基嘧啶),三元配合物的化学组成为:Sm3(AP)(MoO4)2(CH3OH)4Cl5。抗菌结果表明,二元配合物对大肠杆菌和金黄色葡萄球菌的抑菌圈直径分别为13 mm和15 mm,三元配合物分别为13 mm和13 mm,两种配合物对大肠杆菌、金黄色葡萄球菌都有一定的抑制作用。采用MTT法对两种配合物诱导癌细胞凋亡能力做了初步研究,两种配合物的半数抑制浓度IC50在0.001~0.01 mg/mL之间,证明其具有诱导癌细胞凋亡的作用。     

一种新型手性Salen-镍(Ⅱ)配合物的合成与晶体结构

扩散法合成了Salen-镍(Ⅱ)单核配合物Ni(H2DS)·CH30H[H4DS=N,N1-二(3-羧基水杨醛)-(1R,2R)-环己二胺].通过X-ray单晶衍射对配合物进行表征.配合物属单斜晶系,P2(1)/C空间群,晶胞参数:a=7.907(3)A,b=16.884(5)A,c=16.300(6)A,α=90°,β=103.562(6),γ=90°,分子式:C23H24N2NiO7,Mr=499.15,V=21 15.2(12)A3,Z=4,De=1.567 Mg/m3,R1=0.0562,wR2=0.1630[I>2σ(I)].晶体由一个单核配合物Ni(H2DS)和一个没有配位的CH3OH分子组成.     

以二吡啶胺为配体的新型钴配合物的合成及结构

以2,2’-二吡啶胺(Hdpa)和对氨基苯甲酸钠(PABA为4-氨基苯甲酸阴离子)为原料,和氯化钴反应合成了一种新型的钴配合物[Co(Hdpa)2(PABA)]Cl(CH3OH),并通过扩散法得到了该配合物的单晶。通过单晶衍射、元素分析、红外光谱、质谱(ESI)对该配合物进行了结构表征。晶体结构表明:该配合物为阴离子-阳离子型化合物。     

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。