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简介：六新光学地活跃并且flame-retardant(amide-imide)poly，在主要的链作为一个flame-retardant单位包含磷化氢氧化物一半的s白族5a鈥?f从六chiralN的直接polycondensation反应被综合，有二度(3-aminophenyl)的N鈥?(pyromellitoyl)-bis-L-amino酸3a鈥?f在中等在于的苯基磷化氢氧化物4N-methyl-2-pyrrolidone(NMP)，triphenyl亚磷酸盐(TPP)，钙氯化物(CaCl2)和pyridine。生产的聚合反应一系列光学地活跃poly(amide-imide)有好产量和0.34鈥?.70dLg的好固有的粘性的s?1。结果的聚合物充分借助于FTIR和1H-NMR光谱学，胶化浸透层析(GPC)，元素的分析，固有的粘性和溶解度测试被描绘。热性质和白族5a鈥?f的flame-retardant行为被调查使用热gravimetric分析(TGA和DTG)并且限制氧索引(LOI)。热分析(TGA和DTG)获得的数据表明这些聚合物显示出好热稳定性。而且，在TGA的高字符产量和好LOI值显示产生聚合物能够展出好火焰retardant性质。N，N鈥?(pyromellitoyl)-bis-L-amino酸3a鈥?f被pyromelliticdianhydride(1,2,4,5-benzenetetracarboxylicacid-1,2,4,5-dianhydride)的冷凝作用反应在量的收益准备1与L丙氨酸2a，L缬氨酸2b，L白氨酸2c，L异白氨酸2d，L苯基丙氨酸2e和L-2-aminobutyric在醋酸的酸2f答案。关键词光学地活跃-Flame-retardant聚合物-Poly(amide-imide)s-限制氧索引

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简介：Inthispaperwereportachemicaloscillationcatalyzedby[Ni(Me2[14]1,3-dieneN4)]2+(Me2[14]l,3-dieneN4denotes2,3-dimethyl-l,4,8,ll-tetraazacyclotetradeca-1,3-diene)inBrO3--pyruvicacid-H2SO4system.Thedomainoftheexistenceoftheoscillationwasobtained.Theeffectsofinitialconcentrationofthecomponentsontheoscillationwerestudied.Thefeaturesoftheoscillationsweredescribedindetail.WealsoexaminedtheeffectsofAg+,Hg2+,CCl4,freeradicalinhibitors,etc.ontheosillations.

简介：Thetetranuclearalkyltin(Ⅳ)compounds{[R2Sn(C9H8N3O3)O]SnR3}2[R=n-Bu(1),4-CNC6H4CH2(2),C6H5CH2(3),4-ClC6H4CH2(4)]werepreparedbythereactionofSchiffbaseligandpyruvicacidisonicotinylhydrazonewith(R3Sn)2Ointhecorrespondingmolarratioof1:1.Allcompoundshavebeencharacterizedbyelementalanalysis,IRand^1HNMRspectra.Thecrystalstructureofcompound1wasdeterminedbyX-raysinglecrystaldiffractionalanalysis.Thiscompoundexhibitsadimericstructurecontainingdistannoxaneunitswithtwotypesofthetinatoms.Forthefirsttinatom,itappearstobeseven-coordinatedwithadistortedpentagonalbipyramidgeometry,andtheotherisfive-coordinatedwithadistortedtrigonalbipyramidalgeometry.Themoleculesarepackedintheunitcellintwo-dimensionalnetworkstructurethroughaninteractionbetweentheNatomsofthepyridineandthetinatomsofanadjacentmolecule.

简介：Thetitlecomplex,[La(baec)1/2(H2btec)1/2(H2O)]n(H4btec=1,2,4,5-benzenetetracarboxylicacid)(1)wassynthesizedbythehydrothermalreactionof1,2,4,5-benzenetetracarboxylicdianhydridewithLa(NO3)3·6H2OinH2O,andcrystallizesinthetriclinicsystem,spacegroupP-1withα=0.64403(3)nm,b=0.94500(4)nm,c=0.96380(5)nm,α=88.535(2)°,β=100.314(2)°,γ=76.6470(10)°,V=1.69968(10)nm^3,Z=2,andfinalR=0.0274,Rw=0.0735.In1,eachLa(Ⅲ）ioniscoordinatedbyeightoxygenatomsfromsixcarboxylategroupsandonecoordinatedwatermolecule.TwodifferentcoordinstionmodesofH4btecwerePresentinthestructure,oneofwhichcontainstwoprotonatedcarboxylategrougpstobalancethecharge.