简介：6/3-(4-Chlorophenyl)-s-triazolo[3,4-b][1,3,4]thiadiazoles(2a-e)and(5a-e)weresynthesizedrespectivelybyintermolecularcyclizationof5-aryl/4-chlorophenyl-4-amino-3-mercapto-1,2,4-triazoles(1a-e)and(4)with4-chlorobenzoicacid/arylacids,whichwerecondensedwithpiperazineunderphasetransfercatalystTBABtoyieldthecorrespondingfreebasesofmonopiperazinederivativesandfollowedtoformwater-solublesalts(3a-e)and(6a-e)withhydrochloricacidingoodyields.Theinvitrobiologicalresultsshowedthatpiperazinegroupconjugatedwiththeabovefusedheterocyclesplayedanimportantroleinantibacterialactivity.ThestructuresofnovelcompoundswereconfirmedbyIR,1HNMR,MSandelementalanalysis.

简介：4-(Succinimido)-1-butanesulfonicacidasanefficientandreusableBronstedacidcatalyzedthesynthesisofpyrano[4,3-b]pyranderivativesundersolvent-freeconditions.Thecatalystcanbepreparedbymixingsuccinimideand1,4-butanesultonethatismoresimpleandsaferthanthepreparationofsuccinimidesulfonicacid.Thismethodhastheadvantagesofhighyield,cleanreaction,simplemethodologyandshortreactiontime.Thecatalystcouldberecycledwithoutsignificantlossofactivity.

简介：通过典型的双分子亲核取代和烯烃亲电加成反应,讨论了反应过程中,化学键伸缩振动力常数和分子中1个电子所受到的作用势（D_（pb））之间的关联.研究表明分子中1个电子所受到的作用势能够很好地描述反应中键形成和断裂时的化学键强度.

简介：Achiralrutheniumcomplex[(1S,2S)-DPEN]-RuCl_2(PPh_3)_2(DPEN=1,2-diphenylethylenediamine,PPh_3=triphenylphosphine)wasencapsulatedinthechannelofAl-MCM-41byelectrostaticadsorptionand1,1-dichlorosilacyclobutanemodification.Thepreparedheterogeneouscatalystshowedthesamecatalyticactivityandenantioselectivityasthecorrespondinghomogeneouscatalystintheasymmetrichydrogenationofacetophenone,andcouldbereusedatleastseventimeswithoutsignificantlossofcatalyticactivityandenantioselectivity.

简介：Asurface-renewabletris(1,10-phenanthroline-5,6-dione)iron(Ⅱ）hexafluorophosphate(FePD)modifiedcarbonceramicelectrodewasconstructedbydispersingFePDandgraphitepowderinmethyltrimethoxysilane(MTMOS)basedgels.TheFePD-modifiedelectrodepresentedpH-dependentvoltannetricbehavior,anditspeakcurrentswerediffusion-controlledin0.1mol/LNa2SO4+H2SO4solution(pH=0.4).Inthepresenceofiodate,clearelectrocatalyticreductionwaveswereobservedandthusthechemicallymodiffiedelectrodewasusedasanamperometricsensorforiodatencommonsalt.Thelinearrange,sensitivity,detectionlimitandresponsetimeoftheiodatesensorwere5×10^-6-1×10^-2mol/L,7.448μA·L/mmol,1.2×10^-6mol/Land5s,respectively.Adistinctadvantageofthissensorisitsgoodreproducibilityofsurface-renewalbysimplemechanicalpolishing.

简介：The2-C,methylenegroupof1-aroyl-1,2-dihydro-3H-naphtho[2,1-b]pyran-3-ones(2)havebeenshowedtopossessasuperiorreactivitytowardsmanyoforganicreagents.Thena-phthopyrones(2)condensedwitharomaticaldehydestogivethe2-arylidinederivatives(3).Bromin-ationof2gave1,2-dibromo(4)or5-bromo(5)derivativesdependingonthereactionconditions.Thebasecatalyzedadditionorcycloadditionofnaphthopyrones(2)to4-methoxybenzalacetophenonegavetheexpectedMichaeladduct(6)orthecyclicadducts(7-9)dependingonthetypeofcatalyticbaseandreactionconditions.Structuresoftheproductshavebeenestablishedbyelementalanalyses,IRand~1HNMRspectroscopicmethods.

简介：Anovelaciddyeacidwassynthesizedbythecondensationreactionbetweenbromamineacidand2-amino-6-nitrobenzothiazoleanditsanti-UVprotectionpropertieswereevaluated.Theresultsshowedthatsilkdyedwiththisdyehadverygoodultravioletradiationprotectioncapabilityandexcellentdyeingperformance.TheUV-absorptionmechanismofthisdyewasalsodiscussed.

简介：采用水热方法并以邻菲啉为模板剂合成了一种过渡金属配合物连接的无机-有机层状结构的多金属钒酸盐Co（1,10-phen）（H2O）（VO3）2,该化合物经过X-射线单晶衍射、元素分析、红外光谱表征和热失重分析,并用循环伏安法研究了标题化合物的电化学性质.

简介：将WP-1米平面光栅摄谱仪改造成CCD-1型平面光栅电弧全谱直读光谱仪,在原有CCD-1平面光栅电弧直读发射光谱仪测定硼、锡、银、钼基础上,建立了一次摄谱同时测定化探样品中铅、锡、钼、铜、银、锌6种元素的分析方法。实验表明,6种元素测定的检出限分别为Pb1.56、Sn0.42、Mo0.21、Cu0.87、Ag0.012、Zn7.95μg/g,相对标准偏差(RSD,n=12)为1.3%~7.4%,方法的准确度、精密度都能满足地质矿产实验室管理的要求。

简介：Alariatcrownetherligand7,16-bis(2-hydroxy-5-methylbenzyl)-1,4,10,13-tetraoxa-7,16-diazacyclooctadeeane(L1)hasbeenpreparedviaone-potMannichreaction.Itscopper(Ⅱ)complexCu-L1wassynthesizedandcharacterizedbyelementalanalysis,IRandUV-visiblespectroscopy.ThecrystalstructureofthecomplexhasbeendeterminedbyX-raydiffractionanalysis.Theresultshowsthatthecopper(Ⅱ)ionissix-coordinatedbytwonitrogenandfouroxygenatoms,twofromthecrownetherandtheothertwofromthedeprotonatedphenolateanions,forminganelongatedoctahedralcomplex.ElectrochemicalstudyindicatesthatthecomplexundergoesreversiblereductioninDMFsolution.

简介：以1，3-丁二醇、柠檬酸为原料，设计、合成了以1，3-丁二醇为核心的柠檬酸-1，3．丁二醇-柠檬酸（cBc）爪状物小分子；再用酯化反应依次与带有功能化集团的硬酯酸、十六醇接枝合成了多元酯类爪形大分子柠檬酸-1，3-丁二醇-柠檬酸-硬酯酸-十六醇（CBC-SH）．采用核磁共振、红外光谱对合成的两种化合物进行了结构表征，表明合成的CBC和CBC-SH与所设计的分子结构相吻合．元素分析确定了CBC和CBC-SH的化学组成依次为C16H22O14和C98H184O15．合成的CBC-SH溶于非极性的有机溶剂，不溶于水．将CBC-SH按600μg／g的加剂量添加到不同的轻柴油中，柴油的冷滤点可降低6℃．

简介：利用水热方法制备了一个新的过渡金属镉配合物[Cd（1，3-BDC）（L）（H2O）2]·H2O（1，3-H2BDC=间苯二甲酸，L=2-（3-吡啶基）-1H-苯并咪唑），并通过元素分析、红外光谱和X-射线单晶衍射方法确定了该配合物的晶体结构．结构分析表明该配合物属于单斜晶系，P21／c空间群，晶胞参数a=1．01641（6）nm，b=2．08842（12）nm，C=1．00l38（6）nm，β=106．3360（10）°，V=2．0398（2）nm3，Z=4，R1=0．0207，wR2=0．494．配合物中CdⅡ“离子与L配体的1个吡啶N原子、1，3-BDC的4个氧原子和2个配位水的O原子配位，形成七配位的扭曲十面体结构．配体1，3-BDC的桥连相邻的CdⅡ离子形成一维聚合物链，相邻链间通过氢键和π…π作用形成三维超分子网络，并对该配合物的热稳定性和荧光性质进行了研究．

简介：FiveC3/C3fluoroquinolonedimerstetheredwithafusedheterocyclicringofs-triazolo[2,1-b][1,3,4]thiadiazolederivedfromantibacterialquinolonesweresynthesizedandcharacterized,andtheirinvitroantitumoractivityagainstL1210,CHOcelllineswasevaluatedviatherespectiveIC50values.

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：在微波辐射条件下，以2-氨基-5-苯并呋喃基-1，3，4-噻二唑和N．取代三氯乙酰苯胺为原料，在固体氢氧化钠作用下，“一锅法”高产率合成了10种N-（5-苯并呋喃基-1，3，4-噻二唑-2-基）-NL芳基脲，并通过IR、^1HNMR和元素分析表征了目标产物的结构．

简介：选用新颖的有机配体3-噻吩-5-三氟甲基-2,3-二氢-1-H吡唑（L）,在水热条件下成功得到2个新的基于Keggin多酸的超分子化合物,{[Ag（L）_2]_3[PMo_（12）O_（40）]}·3H_2O（1）和{[Ag（L）_2]_3[HSiMo_（12）O_（40）]}·3H_2O（2）.通过红外光谱、元素分析和单晶X-射线对化合物1和2的结构进行了表征.化合物1和2同构,包含1个孤立的Keggin多阴离子和3个金属-有机亚单元[Ag（L）2]＋.其中多酸阴离子和[Ag（L）2]＋片段通过氢键作用力交替连接形成1个一维超分子链.相邻一维链进一步通过氢键连接成二维超分子层状结构.光催化和电化学性质表明,化合物1和2具有相同的电化学性能.

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：采用对称性破损态方法结合密度泛函理论,选用反铁磁双核配合物[Cu2（MMBPT）2Cl4（H2O）2.5]（MMBPT=3-甲基-4-对甲基苯基-5-（2-吡啶）-1,2,4-三唑）作为研究对象,通过与实验数据相比较,探讨了不同密度泛函方法与基组对计算铜配合物交换耦合常数的准确度.结果表明,4种混合密度泛函DFT（B3LYP,B3P86,B3PW91和PBE0）的计算结果都能和实验所观察到的值-31cm-1符号一致,但只有B3PW91方法得到的结果和实验结果吻合程度最好,同时采用方法B3PW91方法计算所得的交换耦合常数Jab对基组的依赖性较大.研究表明,2个Cu（Ⅱ）离子之间弱的反铁磁相互作用主要源于单占据分子轨道SOMOs小的能量劈裂.

简介：

简介：Themononuclearcomplex,[NtCl2(trzCHzCHzCOPh)4]·6H2O(trz=1,2,4-triazole),wassynthesizedanditsstructurewasdeterminedbysinglecrystalX-raydetermination.Itcrystallizesinthemonoclinicsystem,spacegroupP21/c,withlatticepa-rameters:a=0.80391(2)nm,b=1.06215(2)nm,c=2.90133(2)nm,β=94.792(1)°andZ=2.EachnickelatomiscoordinatedbyfourNatomsoftriazolefromfourβ-(1,2,4-IriHole-1-yl)propiophenoneligandsandtwochlorideanionsinarrangementwithoctahedralcoordinationgeometry.Inadditiontothecoordinatingnickelcomplex,therearesixunco-ordinatedwatermolecules.TheNi—Ndistanceis0.24865(8)nmandtheNi—Ndistaneesareintherangeof0.2072(2)to0.2099(2)nm,respectively.Inthesolidstate,theUtiecom-poundformsthreedimensionalnetworkstructurethroughhy-drogenbonds.Theintermolecularhydrogenbondsconnectthe[NiCl2(C2H2N3CH2CH2COPh)4]andH2Omoieties.Thedeepgreencrystalswerealsoexaminedbyelementalanalysis,FT-IRandUVspectra,whichareinagreementwiththestructuralda-ta.