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75 个结果
  • 简介:Quasiclassicaltrajectorycalculation(QCT)isusedfrequentlyforstudyingcollisionalenergytransferbetweenhighlyvibrationallyexcitedmoleculesandbathgases.Inthispaper,theQCToftheenergytransferbetweenhighlyvibrationallyexcitedC6F6andN2,O2andgroundstateC6F6wereperformed.TheresultsindicatethathighlyvibrationallyexcitedC6F6transferredvibrationalenergytovibrationaldistributionofN2,O2andgroundstateC6F6,sotheyareV-Venergytransfer.EspeciallyitismainlyV-VresonanceenergytransferbetweenexcitedC6F6andgroundstateC6F6,excitedC6F6transfersmorevibrationalenergytogroundstateC6F6thantoN2andO2.ThevaluesofQCT,-〈△Evib〉ofexcitedC6F6aresmallerthanthoseofexperiments.

  • 标签: 准经典轨道计算 碰撞能转换 C6F6 N2 O2 氟苯
  • 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.

  • 标签: 二维网络 合成 晶体结构 18-冠醚-6络合物 镉络合物 1 2-二氰基乙烯-1 2-连二硫酸镉
  • 简介:有CuBr2和CdI2催化的公司的1-bromo-6-chlorohexane的Photopromotedcarbonylation在周围的条件下面被执行了。结果显示carbonylation在CuBr2的催化作用下面继续chloroesterClCH2(CH2)5COOCH3的主要产品。而且,carbonylation的活动能被基本添加剂的增加改进(NaOAc,Na3PO4或(n-C4H9)3N)。在这些添加剂之中,(n-C4H9)3N以ClCH2(CH2)5COOCH3的收益是最有效的。然而,代替BrCH2(CH2)5COOCH3的氯产品的methoxycarbonyl没面对CdI2被获得。这与monochloroalkane的carbonylation相当不同。

  • 标签: 光质子羰基化 1-溴-6-氯己烷 溴化铜 三-n-丁胺
  • 简介:PREPARATIONOFN--BUTYLOXYCARBONYL-O ̄α-9-FLUORENYLMETHYLESTEROFASPARTICACID¥ZongJinHAN;ZhenKaiDINGandQiKaiZHANG(BeijingInstitu...

  • 标签: ACID PREP
  • 简介:DimerizationConstantDeterminationof-O-Benzoyl-β-CyclodextrininAqueousSolution.DimerizationConstantDeterminationof-O-Benzoyl?..

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  • 简介:Poly-3-methylthiophene(P3MT)在房间温度被综合离子的液体1-butyl-3-methylimi-dazoliumhexafluorophosphate([BMIM]PF6)由经常的潜在、经常的电流分别地。P3MT电影的结构和形态学被FTIR光谱和SEM描绘。undoped(减小)并且做(氧化)在离子的液体准备的P3MT电影的形式可逆、稳定。P3MT电影有维生素酸和罐头的electrocatalytic氧化的强壮的特征分开维生素酸和多巴胺的氧化山峰。潜在的步的二个方法被用来观察这部电影的反应时间,这部电影被发现有完美的electrochromic反应。

  • 标签: 电聚合 3-甲基噻吩 PF6离子液体 表征 维生素C 合成
  • 简介:对金银花中Mn,Fe,Cu,Zn,Ca和Mg6种金属元素的化学形态进行了分析。用传统的煎煮法把元素提取以后,分别采用0.45μm微孔滤膜、LSA-10大孔吸附树脂柱、正辛醇/水分配体系,以区分元素的可溶态和悬浮态、有机态和无机态、醇溶态和水溶态,最后用火焰原子吸收光谱法(FAAS)对湿法消解以后的各种元素进行测定。结果表明,6种元素的提取率在14.97%~48.54%,悬浮态的颗粒吸附率在4.02%~19.84%,加标回收率在96.58%~103.9%,RSD(n=6)≤2.4%。

  • 标签: 金银花 金属元素 火焰原子吸收光谱法 形态分析
  • 简介:AseriesofdoubleperovskitesRSrMnFeO_6(R=La,Pr,Nd,Sm)wassynthesizedundermildhydrothermalconditions.Crystalgrowthsofthesamplesweresensitivetoalkalinity,temperature,fillingfraction,andcompositionofinitialreactionmixture.ThedesiredseriesofcompoundsbelongstotheclassofAA'BB'O_6perovskiteswitharandomdistributionofMnandFeatomsovertheB-cationsub-lattice.TheirstructuresshowthedistortedorthorhombicsymmetrywithspacegroupPnma.TheshapesandsizesofthecrystalswereanalyzedonaRigakuJSM-6700Fbyscanningelectronmicroscopy.AnalysisdonebyXPS,MssbauerspectroscopyandiodometrictitrationrevealsthatMnandFeionshave+4and+3oxidationstates,respectively.

  • 标签: 钙钛矿相 水热合成 扫描电子显微镜 表征
  • 简介:Onenewsesquiterpenecompound,namely,illihenlactoneA(1),andonenewprenylatedC6–C3compound,illihenryioneH(2),alongwiththreeknownsesquiterpenes(3–5)wereisolatedfromthestemsofIlliciumhenryi.Thestructuresof1and2wereelucidatedbyspectroscopicevidenceincludingNMR,HRESIMSandcirculardichroism(CD).Compound2exhibitedaweakinhibitoryratioforbglucuronidasereleaseinducedbyplatelet-activatingfactor(PAF)inratpolymorphonuclearleukocytes(PMNs)invitro.

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