摘要
Thispaperstudiestheretardationprocessforphotosensitizedoxidationof9,10-diphenylanthracene（9,10-DPA）inducedbyhypocrellinA（HA）asasensitizerinthepresenceofpraseodymiumion(Pr3+).ExperimentalresultshowsthatthepromptfluorescenceofHAcanbequenchedbyPr3+inmethanol.Measurementoffluorescencelifetimerevealsthatitremainsconstantwithincreasingcon-centrationofPr3+,thusastaticquenchingcharacterisindicated.ThethermallyinduceddelayedfluorescenceofHAcanalsobequenchedeffectivelybythePr3+-HAcomplex.Thedelayedfluorescencelifetimeisre-ducedfrom1744±50nsto700±50nsand500±50nsinthepresenceofoxygenandPr3+respectively,thusthequenchingofdelayedfluorescenceisofdynamiccharacter.Ascomparedwiththedoublereciprocalrela-tionshipofconcentrationbetweentheoxidationproductderivedfromsingletoxygenandthereactant,itshowsthatthePr3+-HAcomplexcanquenchnotonlytheexcitedtripletofHAbutalsothesingletoxygenandthereforethephotosensitizedoxidationof9,10-DPAisretardedefficiently.
出版日期
1990年01月11日（中国期刊网平台首次上网日期，不代表论文的发表时间）
