简介：Themicrostructuresofloadedorganicphasesofthreequaternaryaminesolventextractionsystemsforgold,whichwereN263-xylene,N263-tributylphosphate(TBP)-dodecaneandN263-2-ethylhexanol(isooctanol)-dodecane(N263-trialkylmethylammoniumchloride;alkyl=C8-C10),werestudiedbyFouriertransforminfrared(FTIR)spectroscopyandextendedX-rayabso\rptionfinestructure(EXAFS)spectroscopy.AccordingtotheEXAFSresults,itwasfoundthatthegoldcoordinationenvironmentwasthesamebeforeandafterextraction.However,theC≡NstretchingvibrationsofAu(CN)2-werealsofoundtobedifferent,InordertoexplainthedifferencesintheIRcharacteristicsofC≡Ninthethreeextractionsystems,threemicrostructuremodelsareproposed.FortheN263-xylenesystem,themodelisasimpleionpair.Fortheothertwosystemswithamodifier(TBPandisooctanol),themodelsaretwosupramolecularstructuesbasedonhydrogenbondingbetweenthemodifierandAu(CN)2^-.SomerelatedworksuchasonthehydrationofacetonitrileandthefinestructureofC≡NinsolidKAu(CN)2wasalsoperformedinordertoofferadditionalsupportingevidenceforthereliabilityoftheproposedmodels.