简介：为10-aryl-6,8-dimethyl-6,10-dihydro-5-oxa-6,8-diazaanthra的准备的一个环境地友好的过程[2,3-d][1,3]在热没有溶剂的条件下面的dioxole-7,9-diones面对是的氰尿酸氯化物，异构的催化剂被开发。

简介：Newmethodsfordehydrogenationofsteroidal2,5（10）-dieneswith2,3-dichloro-5,6-dicyano-1,4-benzoquinone（DDQ）orpyridiniumhydrobromideperbromide（PHP,Py·HBr·Br2）toaromaticAringsteroidinquantitativeyieldinshorttimearedescribed.

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简介：ＴＨＥ　ＳＵＰＰＯＲＴＥＤ　ＧＯＬＤ　ＣＡＴＡＬＹＳＴＳ　ＦＯＲ　ＣＬＯＳＥＤ　ＣＹＣＬＥ　ＣＯ２　ＬＡＳＥＲＴＨＥＳＵＰＰＯＲＴＥＤＧＯＬＤＣＡＴＡＬＹＳＴＳＦＯＲＣＬＯＳＥＤＣＹＣＬＥＣＯ２ＬＡＳＥＲ￥ＺｈｅｎｇＰｉｎｇＨＡＯ；ＬｉＤｕｎＡＮ；...

简介：Ｎｉ／Ｍｏ２ＮａｓａＨｉｇｈｌｙＡｃｔｉｖｅＨｙｄｒｏｄｅｎｉｔｒｏｇｅｎａｔｉｏｎＣａｔａｌｙｓｔＮｉ／Ｍｏ２ＮａｓａＨｉｇｈｌｙＡｃｔｉｖｅＨｙｄｒｏｄｅｎｉｔｒｏｇｅｎａｔｉｏｎＣａｔａｌｙｓｔ￥ＷｅｎＹｕＺＨＡＮＧ；ＸｉｎＰｉｎｇＷＡＮＧ；...

简介：Anovelquaternarymetalselenide,K_2CdSnSe_4,wassynthesizedviaamolten-saltreactionat550℃.Thecompoundhasaone-dimensionalstructurecontainingachainof_∞~1[CdSnSe_4]~(2-)anionsseparatedbyK~+cations.ThecrystalbelongstothespacegroupI-42m,withtheunitcellparametersa=0.80298(11)nm,b=0.80298(11)nm,c=0.69217(14)nm,α=β=γ=90°.Areflectancespectroscopystudyrevealsthenatureofthesemiconductorwithanenergygapof1.7eVforthecompoundandithasastrongopticalabsorptioninarangeof2—5eV.

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简介：Thenovelcomplex[K(18-C-6)]2[Cd(mnt)2][18-C-6-18-crown-6,nmt=1,2-dicyanoethene-1,2-dithiolate,C2S2-(CN)2^2-]wassynthesizedandcharacterizedbyelementalanalysis,IRspectrumandX-raydiffractionanalysis.Thecomplexdisplaystwo-dimensionalnetworkstructureof[K(18-C-6)]complexsegmentsand[Cd(nmt)2]complexsegmentbridgedbyS-K-S,S-K-NandN-K-Ninteractionsbetweenadjacent[K(18-C-6)]and[Cd(mnt)2]units.

简介：AsimpleandefficientcascadeMichael/cyclizationreactionof3-aminoindolin-2-oneswithenones/enalswasidentifiedforthesynthesisofpotentiallybiologicallyactive3’,4’-dihydrospiro[pyrrol-3,2’-oxindoles],usingDBUasanefficientcatalystandethyleneglycolasanenvironmentallybenignsolvent.Morediverse3’,4’-dihydrospiro[pyrrol-3,2’-oxindoles]analoglibrarieswerepreparedingoodyields(upto97%).Thestructureof3’,4’-dihydrospiro[pyrrol-3,2’-oxindoles]wasconfirmedbymassspectrometryanalysis,NMRanalysisandsinglecrystalX-raydiffraction.Themainadvantagesofthismethodincludetheavailabilityofstartingmaterials,simpleexperimentaloperation,shortreactiontime,aswellashighyieldsobserved.

简介：ＳＹＮＴＨＥＳＩＳ　ＡＮＤ　１８３Ｗ　ＮＭＲ　ＣＨＡＲＡＣＴＥＲＩＺＡＴＩＯＮ　ＯＦ　Ｐ４Ｗ３０Ａｌ４（Ｈ２Ｏ）２Ｏ１１２２０－　ＨＥＴＥＲＯＰＯＬＹＡＮＩＯＮＳＹＮＴＨＥＳＩＳＡＮＤ１８３ＷＮＭＲＣＨＡＲＡＣＴＥＲＩＺ?..

简介：TheexpansioncoefficientC^D｜L｜ofCoulombpotential1/jtofmolecularsystemsinhypersphericalharmonicsisderivedindetail,andtheexplicitexpressionisgiven.

简介：以罗丹明B、水合肼及9-蒽甲醛为原料,合成了一种新型化学传感器AR.其在体积比为1的乙醇/水溶液中能高选择性地识别Cu2＋,同时在557nm处有显著的紫外吸收,溶液颜色由无色变为紫色.在AR与Cu2＋结合后,该体系对S2-显示较高的专属性,且也能引起裸眼颜色变化.此外,通过核磁滴定、EDTA滴定实验验证AR与Cu2＋的识别机理为可逆性识别.该探针还可制成溶液和试纸检测1mmol/L级别含Cu2＋水样.因此,构建了一种新的基于罗丹明B的高选择性连续识别Cu2＋和S2-的可逆型化学传感器.

简介：氧化铝在层次地多孔的氧化锆固体酸做和硫酸化经由一个壶和bi-surfactant-assisted同时被完成了自己组装过程，把铝硫酸盐用作艾尔和SO42吗？来源。没有氧化铝没有层次地多孔的结构，做和做Al的sulfated氧化锆，准备的合成的稳固的酸与sulfated氧化锆相比为酯化作用反应显示出许多提高的酸味和再循环的催化活动。

简介：合成了通式为K10H5[Ln(PMo7W2VO39)2].nH2O(Ln-La^3+,Ce^3+,Pr^3+,Nd^3+,Sm^3+,Eu^3+,Gd^3+,Dy^3+,Yb^3)的9种五元新型杂多配合物，并用元素化学分析，TG，ICP，IR，UV，31^1P,51V-NMR,ESR,XPS,XRD进行了表征，结果表明新配合物仍保持Keggin结构，稀土元素处于配合物的内界。借助TG－DTA，不同温度下的IR，XRD的水溶性实验考察了新配合物的热解性质，得出了热稳定的温度范围为400℃-500℃，为催化研究提供了依据。

简介：采用密度泛函方法(B3LYP)优化了MX2(AsH3)2[M=Pd;X=Cl(1),Br(2),I(3)和M=Pt;X=Cl(4),Br(5),I(6)]的基态结构,得到的几何参数与实验结果符合.以基态几何为基础,将TD-DFT方法用于计算标题配合物的电子吸收光谱.研究结果表明,金属的dx2-y2与配体所组成的反键轨道为LUMO轨道,从而该类配合物具有d-d跃迁属性的吸收带;在多数跃迁过程中,配体也有较大的贡献.

简介：乙醇2-的催化不对称的加氢的申请(benzo[b]thiophen-5-yl)为认知enhancerT-588的正式合成的-2-oxoacetate被描述。加氢作为添加剂与HCl在Ru-SunPhos系统的催化作用下面被进行。乙醇2-(benzo[b]thiophen-5-yl)-2-hydroxy-acetate与98.6%ee被获得，它能容易在简单再结晶以后被升级到99.5%ee并且在T-588的合成用作关键中介。

简介：Theadsorptioncapabilityofloamsoilfornano-TiO2affectedbytheamountandintensityofleachedwaterhasbeeninvestigatedbysimulatingthenaturalrainfallprocessundertheleachingcondition.Theresultsshowthattheamountandtheintensityofleachedwateraretwoimportantfactorsaffectingtheadsorptioncapabilityofloamsoilfornano-TiO2.Theresultsindicatethatthedepthoftheloamsoilcontainingamaximalamountofnano-TiO2isproportionaltotheamountofleachedwater,whileitisinverselyproportionaltotheintensityofleachedwater,ataconstantamountoftheleachedwater.Itwasalsofoundthattheadsorptioncapabilityofsoilsfornano-TiO2canbeimprovedbyaddingothermaterials,suchasdissolvedorganicmatter(DOM),bentoniteandstraw.ItwasfoundthatDOMisthebestsorbentforimprovingtheadsorptioncapabilityofloamsoilfornano-TiO2,followedbybentonite,whilestrawisnotsuitableforthemodificationofloamsoil.Theimprovementofadsorptioncapabilityofloamsoildependsontheamountoftheseadditives.Nano-TiO2canbeeffectivelyadsorbedonthesurfacelayerofloamsoilcontaininganappropriateamountofadditive.

简介：忍受2,6二度(imino)的一系列钴建筑群含苯氧基的ligands，LCoCl2[L=2,6-(ArNCH)2CH3C6H2OH]被ligand2,6二度(imino)的反应综合有钴二氯化物的相等的鼹鼠的酚，和这些建筑群被元素的分析描绘，1HNMR，MS和红外系列。一建筑群的结构被单个水晶X光检查衍射分析决定。

简介：InT12SO4+Na2SO4+di(2-ethylhexyl)dithiophosphoricacid+n-CsH18+watersystem,theT1^+equilibriummolalitiesweremeasuredationicstrengthfrom0.1to2.0mol·kg^-1containingNa2SO4assupportingelectrolyteinaqueousphaseandatconstantmolalityofextractantattemperaturesfrom278.15to303.15Kinorganicphase.ThestandardextractionconstantsK^0atvarioustemperatureswereobtainedbymethodsofextrapolationandpolynomialapproximation.Thermodynamicquantitiesfortheextractionprocesswerecalculated.

简介：Anefficientsyntheticmethodwasdevelopedtosynthesize2-substitutedbenzimidazolesandbenzo-xazoleswithβ-ketoestersasstartingmaterialsundermildreactionconditions,duringwhichotherfunctionalgroupsarebearablefromreactantstoproducts.