简介：NaphtholgreenBwasused,forthefirsttime,asanewmediatorinanamperometricglucosebiosensor.Itisagoodmediator,promotingelectrontransferfromglucoseoxidasetographiteelectrode.Thebiosensorshowshighsensitivitytoglucoseatlowpotentialwithresponsetimeof30seconds.Thelinearrangeisfrom1.5to18μmol/Lglucosewithdetectionlimitof0.5μmol/Lglucose.

简介：运用离散变分Ｘα方法对双核金属酞菁(Ｍ＝Ｖ２＋、Ｃｒ２＋、Ｍｎ２＋、Ｆｅ２＋、Ｃｏ２＋、Ｎｉ２＋、Ｃｕ２＋、Ｚｎ２＋等)系列化合物进行了量子化学研究，得到了其费米能级。总态密度、前线轨道布居等，讨论了它们的催化活性。

简介：AbinitiomolecularorbitalcalculationsofdoublynegativechargedB16H162-(D2)andneutralB16H16(Td)havebeendoneattheHF/6-31Glevel.TheyarepredictedtobechemicallyandkineticallystablebyvibrationalanalysesontheirrespectiveenergyhypersurfaceoftheHF/6-31Glevel.ThegeometricalstructureofthespeciesB16H1622-(D2)wasdiscussed.

简介：FluorescencequenchingofjanusgreenB(JGB)insodiumdodecylsulfate(SDS)micellebynucleicacids(DNA)wasstudiedusingUV-visabsorption,steadystatefluorescenceemissionmethodsandlifetimemeasurements.IntheSDSmicelle,weakfluorescenceofJGBwasenhanced,andthemaximumemissionshiftedfrom425to410nm.InthepresenceofDNA,thefluorescenceofJGBwasquenched.Linearrelationshipsbetweenthefluorescencequenching(F0/F)andconcentrationsofDNAwereobservedintherangeof2.4×10^-8to1.08×10^-7mol·L^-1forcalfthymusnucleicacids(ctDNA)and1.9×10^-8to3.8×10^-8mol·L-1forfishspermnucleicacids(fsDNA)when2.5×10^-5mol·L^-1JGBwasemployed.Thelimitdetectionwere1.3×10^-8mol·L^-1forctDNAand6.4×10^-9mol·L^-1forfsDNA.AthighDNAconcentration,therewasasystematicdeviationfromtheStem-Volmerequationduetothestaticanddynamicquenchingoccurringsimultaneously.TheproposedmethodwasappliedtothedeterminationofthenucleicacidsinchickenbloodextractionandtheanalyticalresultswereingoodagreementwiththeUV-method.

简介：FournewtaxanediterpenoidswereisolatedfromthebarkofTaxusyunnanensis.Theirstructureswereelucidatedasthenewskeletonwith5/7/6/4memberedringsbyspectralanalysisand2DNMRshiftcorrelationexperiments.

简介：TwoseriesofterritremBanalogues(10a-10cand18)havebeendesignedandsynthesizedfromjujubogenin5awhichwaspreparedfromjujubogeninglycosides5bobtainedfromtheleavesofZizyphusjujuba.Thestructuresofthenewcompoundswereconfirmedby1H-,13C-NMRandMSdata.Compounds10cand18showedweakinhibitoryeffectonAChEat10^-4mol/E.

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简介：ThemethanolicextractfromaChineseendemicChrysanthemumplant,Dendranthemaindicumvar.aromaticum,wasfoundtoshowhighantifeedingactivityagainstPierisbrassicaeL.,andbybioassay-guidedseparation,theactivecomponent,B-ring-homo-tonghaosu,2-(2',4'-hexadiynylidene)-1,6-dioxaspiro-[4,5]-dec-3-ene(2)wasisolated.Itsstructurewaselucidatedbycomparingitsspectroscopicdatawiththoseof2reportedintheliteratures.FurthermorenewconvenienttotalsynthesismethodsofB-ring-homo-tonghaosuwerealsodevelopedtoconfirmitsstructureandmakeitsfurtherapplicationincropprotectionavailable.Inaddition,extensivecomparisonofspectroscopicdatashowedthatthestructureofcompound21reportedinliteratureshouldberevisedto2.

简介：极其细小磨擦非结晶的合金催化剂被化学减小与KBH4准备。在在气压的cinnamaldehyde的液体阶段加氢期间，Ru-B催化剂准备了展出优秀选择到cinnamyl酒精。当加氢与超声的照耀被执行时，当到cinnamyl酒精的选择仍然保持几乎未改变时，反应率能极大地被提高。加氢率随超声的频率或照耀时间的增加被增加。根据各种各样的描述，例如XRD，XPS，TEM，赌注和ICP，结构、电子的特征上的超声的照耀的效果磨擦催化剂简短被学习。同时，催化表演上的ultrasonication的提升效果也基于cinnamaldehyde的选择加氢被讨论到cinnamyl酒精。

简介：提出了双核金属酞菁类化合物催化Ｈ２Ｓ液相氧化反应的催化电池电子转移机制，即借助于催化剂分子自身歧化所形成的催化电池Ｍ（Ⅰ）Ｐｃ－ＰｃＭ（Ⅲ）实现底物（ＨＳ－）与分子氧间的电子转移，其反应过程为阴极反应：Ｏ２＋Ｍ（Ⅰ）Ｐｃ→Ｏ２－＋Ｍ（Ⅱ）Ｐｃ，阳极反应：ＨＳ－＋Ｍ（Ⅲ）Ｐｃ→ＨＳ·＋Ｍ（Ⅱ）Ｐｃ。这一电子转移过程也是决定整个反应的控制步骤，从而导致催化反应按自由基历程进行。

简介：HeteroatomM-ZSM-12zeolites(M=B,Al,Ge,Ga,Fe)arehydrothermallysynthesizedanditisprovedthattheheteroatomMisinvolvedintheframeworkofsynthesizedmolecularsievesbymeansofXRD,IRspectra.TheresultsofadsorptionanddiffusionexperimentsindicatethattheheteroatomMmodifiestheporevolume,specificsurfacearea,andthechannelofZSM-12molecularsieves.

简介：Thetitlecomplexi-C4H9Co（salen）（Py）（Py=pyridine.salen=dianionofdisalicylideneethylenediamine）hasbeenfirstsynthesized.ItscrystalstructurehasbeendeterminedbyX-raydiffractionmethod.ThecrystsisaremonoclinicwithspacegroupP21/C.Theunitcellparametesarepresented.ThestructurehasbeenrefinedtoafinalRof0.038.

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：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：3-(2-Hydroxyphenyl)-6-(4-nitrophenyl)-7H-1,2,4-triazolo[3,4-b][1,3,4]thiadiazine,C16H11N5O3S,waspreparedbythecyclizationof3-(2-hydroxyphenyl)-4-amino-5-mercapto-1,2,4-triazolewith2-bromo-4-nitroacetophenone.Thecompoundwascharacterizedbymeansofelementalanalysis,IR,1HNMR,13CNMR,massspectrometry,andX-raydiffraction.ThecompoundcrystallizesinamonoclinicsystemwithspacegroupCc,a=2.1853(4)nm,b=2.1192(5)nm,c=1.3526(3)nm,β=95.21(2)°,V=6.238(2)nm3,Dcalcd.=1.505Mg/m3,Z=16,F(000)=2916,R1=0.0501,wR2=0.0427.Acomparisonbetweenthecrystalstructuresof1,2,4-triazolo[3,4-b][1,3,4]thiadiazineand1,2,4-triazolo[3,4-b][1,3,4]thiadiazolewasmadeinthestructuralview.Atwo-dimensionalnetworkisformedbyhydrogenbondsandπ-πstackinginteractions.

简介：8,8′-Dibromo-6,6′,7,7′-tetramethoxy-5,5′-diisopropyl-3,3′-oxydimethylenedinaphtho[2,1-b:2′,1′-d]furan,C32H30Br2O;M.W.=670;triclinic;spacegroupP1;a=8.896（2）,b=10.216（1）,c=10.423（1）A,α=108.48（1）,β=119.36（1）,γ=99.26（1）;V=723.5A3;Z=1,Dcal.=1.479g.cm-3.MoKα=28.11cm-1,F（000）=326,T=293K.Thestructurewassolvedbydirectmethodandfull-matrixleast-squaresrefinementconvergedatR=0.034for2377observedreflections.Theoxygenatominseven-memberedringexistsinadisorderedarrangement.Bothbisnaphthaleneandoxygen-containingfive-memberedringhaveplanarconformationswithdihedralangle6°,showingmarkedaromaticfeature.

简介：Halfsandwichirondicarbonylcomplex[η5-C5H3(t-Bu)2]Fe(CO)2Cl(1)reactswith1,2-dilithiumdiselenocarboraneLi2Se2C2B10H10(2)togiveabinuclearironcarboranecomplex[η5-C5H3(t-Bu)2]2Fe2(CO)3*Se2C2B10H10(3).TheX-raydiffractionanalysisofcomplex3revealsthatoneoftheironatomsischiral.