钯掺杂的25-原子和38-原子金纳米团簇

inthiswork,wedescribetwosyntheticproceduresforpreparingpalladiumdoped25-atomnanoclusters(referredtoaspd1au24(sr)18,where―srrepresentsthiolate,r=c2h4ph).purepd1au24(sc2h4ph)18nanoclustersareisolatedbysolventextractionandsizeexclusionchromatography.massspectrometryandopticalspectroscopyanalysesdemonstratethatthepd1au24(sc2h4ph)18nanoclusteradoptsthesamecore-shellstructureasthatofthehomogoldau25(sc2h4ph)18nanocluster,thatis,apd-orau-centeredicosahedronsurroundedbysixau2(sr)3“staple”-likemotifs.similardopingbehaviorhasalsobeenobservedin38-atomm38(sr)24(m:metal)nanoclusters,indicatingtheuniquebehaviorofpddopantbeingpreferentiallylocatedintheicosahedralcenter.thecatalyticactivityofpd1au24(sc2h4ph)18hasalsobeenevaluatedfortheselectivehydrogenationofα,β-unsaturatedketone(e.g.,benzalacetone)toα,β-unsaturatedalcohol,anda42%conversionofbenzalacetoneisattained.