简介：Newmodelcompound1H,1′H-Bis（benz-Δ^4-imidazoline)2,2′-spiro-titaniumdichloridewaspreparedandthestructureofthecompoundwasdeterminedby1R,MSandelementaryanalysis.

简介：Inthispaperstudyonthepropertyandmechanismofadsorptingrheniumfromaqueoushydrochloricacidbyusingmethylphosphorousaciddimythylheptylesterlevextrelresin(CL-P350)isreported.Theeffectsoftime,acidity,concentrationofrhenium,andtemperatureontheadsorptionofrheniumwereinvestigated.ThemechanismofadsorptingrheniumwasdiscussedbychemicalanalyticandIRmethod,anddynamicadscrptionandelutionwerestudied.Experimentalresultsshowthattheadsorptionequilibrationisreachedin4min,thedistributioncoefficient(D)ofRe(Ⅶ）increaseswithincreaseofconcentrationofHClandreachesmaximum3.0-4.0moL/LHCl.ReO4^-istakenupbyionassociationmechanismandcanbedescribedbyLangmuirequationoftheequilibriumstate.ThethermodynamicparametersintheadsorptionprocessofReO4^-havebeendeterminedtobe:ΔH=-29KJ/moL,ΔG=-25KJ/moLandΔS=-13.5J/moLrespectively.Thesaturationadsorptioncapacityofrheniumis19.2mg/gwhenthesolutioncontaining0.372g/LReand3.0mol/LHClwaspassedthroughtheresincolumn.Therecoverypercentageofrheniumis98.4%whiledistilledwaterwasusedasaneluent.

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简介：Opticallyactive(R)-(+)-2,2’-bis(2-trifluoro-4-aminophenoxy)-1,1’-binaphthylwaspreparedfrom1,1’-bi-2-naphthol.Theopticallyactivearomaticpolyimidewasalsosuccessfullysynthesized.Thisnewpolymerhasgoodsolubility,thermalstabilityetc.Itsspecificrotationwasfoundtobe+174°,anditschiropticalpropertywasalsostudied.