简介：Inthiswork,areliableandsensitivemethodfordetectingpolybrominateddiphenylethers(PBDEs)hasbeendevelopedbythecombinationofliquid–liquidextractionandgaschromatography–massspectrometry.PBDEswereextractedfromalargevolumeofwaterbyliquid–liquidextractionandpurifiedbysilicagelchromatography.Inordertoreducethedeviation,dibromobiphenylwasexploitedastheinternalstandardtominimizedifferencesamongtheinjections.Thequantificationwasperformedusinganexternalstandard.Goodlinearcorrelationcoefficients(>0.991)andawidelinearityrange(1.0–500.0ng/L)indicatedthesteadinessoftheproposedmethod.Moreover,thesatisfactoryrecovery(>75%)suggestedthatsuccessfuldeterminationofPBDEsinriverwaterhadbeenachieved.Furthermore,thedeductionbehaviorofPBDEsinriverwatercouldbeinferredaccordingtotheresults.

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简介：Theoptimalconditionsforthecomplexationreactionofmeso-tetra(3-methoxy-4-hy-droxyphenyl)porphineT(3-M-4HP)Pwithplatinumandrhodiumarepresented.Beer’sLawisobeyedwhentheconcentrationofrhodiumisintherangeof0.45-1.15μg/25mL.Themolarabsorptivityofrhodiumwasfoundtobe1.99×106L·mol-1·cm-1at460nm.ThevalueofεPtwasfoundtobe6.28×105L·mol-1·cm-1bylinearregressionmethod.TheKcoefficientmethodandcompensatingcoefficientwereusedtodetermineplatinumandrhodiumsimultaneoulywithoutremovalormaskingoftheinterferentsinthesample.Theresultsforthedeterminationofplatinumandrhodiuminthemixedsolutionofplatinumandrhodiumaresatisfactory.

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简介：Poly(4-vinylpyridine)supportednanoparticleofcopper(Ⅰ)iodideisreportedasagreenandrecyclablecatalystfortheregioselectivesynthesisof1,4-disubstituted-1H-1,2,3-triazolesfrombenzylhalides,sodiumazideandterminalalkynesinwater.Thiscatalystcanberecoveredbysimplefiltrationandrecycledupto8consecutiverunswithoutanylossofitsefficiency.

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.

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