简介:AseriesofnovelN-(3-furan-2-yl-1-phenyl-1H-pyrazol-5-yl)amidesderivativesweredesignedandsynthesized.Theirstructureswereconfirmedby1HNMR,13CNMRandHRMS.Alltitlecompoundswereevaluatedfortheirherbicidalandantifungalactivities.Preliminarybioassayresultsindicatedthatthetitlecompoundsshowedgoodtomoderateherbicidalactivityat1000mg/L.Compound6qpresentedthebestactivityagainstDigitariasanguinalis(L)Scop.,AmaranthusretroflexusL.andArabidopsisthalianawithaninhibitiondegreeoffive.Compound6dalsoshowedaninhibitiondegreeoffiveagainstD.sanguinalis.Inaddition,at50mg/L,mostcompoundsexhibitedgoodinvitroantifungalactivityagainstSclerotiniasclerotiorum,withcompound6cshowingover90%antifungalactivityagainstS.sclerotiorumandPelliculariasasakii.
简介:建立了一种电感耦合等离子体质谱(ICP-MS)法测定环境水样中Cu、Zn、Mn、Pb、Cd5种重金属元素含量的方法。经过仪器条件优化和干扰校正后,方法中5种元素的工作曲线的相关系数均大于0.999,检出限为0.014-0.22μg/L。对加入国家标准物质作为质控样15个批次的环境水样进行统计分析并绘制质控图。同时与原子吸收光谱法测定结果进行对比分析,测定值与标准值基本一致,质控样的测定值基本都在控制线范围之内。结果表明,方法精密度和准确度均能满足环境水样的分析,ICPMS法更适用于大批量、多样化环境水样的监测分析。
简介:利用水热法首次合成了具有两种配位环境Cd原子的新型杂多蓝化合物[NH3(CH2)2NH3]5[Cd(H2O)][CdMo12^vO30(HPO4)6(H2PO4)2]·5H2O.通过元素分析、ICP、TG和X射线单晶衍射确定了其组成,使用IR和EPR进行了结构表征.通过N2吸附脱附测定了比表面积和孔径,为催化研究提供了基础数据.结果表明:该晶体为三斜晶系,P-1,空间群;晶胞参数a=1.2002(2)nm,b=1.4651(3)nm,c=2.1192(4)nm,V=3.5642(12)nm^3,p=83.01(3)°,Z=2,F(000)=2932,R1=0.0300,wR2=0.0716.
简介:标题化合物C22H29N3O3以简单易得的试剂为原料,在乙醇溶剂中,微波辐射下经两步多组分反应合成得到.其结构通过单晶X射线衍射法确定,晶体属三斜晶系,空间群P-1,相对分子质量Mr=383.48,晶胞参数a=1.14770(12)nm,b=2.0657(2)nm,c=1.00780(12)nm,V=2.1841(4)nm3,Z=4,晶胞密度Dc=1.166mg/m3,吸收系数μ=0.078mm-1,单胞中电子的数目F(000)=824.晶体结构用直接法解出,经全矩阵最小二乘法对原子参数进行修正,最终的偏离因子为R1=0.0709,wR2=0.1405.在晶体结构中新形成的噌啉环为近似于共平面结构,而其中的哒嗪环则为船式构象.
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:Novelsulfur-containingcompounds(3a–3c,4a–4c)wereobtainedinethanolwith1,3-diphenyl-2-propanoneasthestartingmaterial.Theadvantagesofthisprocedureweremildreactionconditions,simpleprotocol,andhighyields.ThestructuresoftheproductswerecharacterizedbyIR,1HNMR,MSandelementaryanalysis.Thecrystalofthenewcompound4abelongstomonoclinic,spacegroupC2witha=18.727(3),b=6.5179(9),c=13.7576(18),b=131.0610(10)°,V=1266.2(3)A3,Z=2,Dc=2.136g/cm3,μ=1.078mm-1,F(000)=843,R=0.0490andwR=0.1247for3211observedreflectionwithI>2δ(I).X-rayanalysisrevealsthatthemoleculeisnotsymmetrical,themolecularstructureisstabilizedbyweakp–pstackinginteractions,andnoclassicalhydrogenbondscanbeobserved.
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:ThecrystalstructureofDi-nitratobis(ethylcaprolactam)uranyl(Ⅱ)UO2[CH2(CH2)4CONC2H5]2(NO3)2wasestablishedbyasingle-crystalX-raydiffractionstudy.Itistriclinie,spacegroupP1,witha=7.171(2),b=8.655(3),c=10.182(5)A,α=78.27(3),β=70.63(3),γ=81.76(3)°,V=581.7(4)A3,Z=l,Dc=1.94g.cm-3.FinalRvalueis0.0218.Theresultrevealsthaturanylioniscoordinatedtosixoxygenatoms,twoofthemarefromtwocarbonylgroupsofethylcaprolactamandtheotherfourarefromtwonitrategroups.
简介:研究了快速测定高温合金中5种非金属元素(As,B,P,Se,Si)的分析方法,以满足高温合金行业对非金属元素检测的需求。利用王水、氢氟酸和酒石酸对高温合金进行酸溶解,系统研究了基体元素和共存元素对分析元素谱线的光谱干扰情况,同时进行了分析谱线的选择。5种非金属元素的检出限在5.0~12.0μg/mL,5次数据的相对标准偏差(RSD,n=5)为1.1%~4.0%,各元素的加标回收率在96%~102%,方法适用于高温合金中非金属元素的测定。