The luminescencequenchingofexcitedTris(2,2-bipyridine)ruthenium(II)ionsby trans-[RuCl2{P(OR)3}4] complexeswithdifferentalkylchainligands(R ¼ C2H5, C2H5Cl, nC4H9, iC3H7 o-tolyland tC4H9) was investigated.NoneoftheacceptorRu(II)phosphitecomplexeswereluminescent,andtherateconstants of thebimolecularsystemweredeterminedwithintherangeof1.15and0.28108M1 s1 for R ¼ C2H5 and tC4H9, respectively.Theresultsindicateadirecteffectofthealkylchainsintherateconstants, showing adecreaseof kq as afunctionofincreasedofthealkylchains(R)intheruthenium(II) tetraphosphitecomplexes.ThegreatertheRgroupcontentinthephosphiteligand,themoredifficult the electrontransfer is.
Luminescece quenching of *[Ru(bpy)3]2+ byruthenium(II)tetraphosphite complexes withdifferent phosphiteligands.
MELE, Giuseppe Agostino;
2009-01-01
Abstract
The luminescencequenchingofexcitedTris(2,2-bipyridine)ruthenium(II)ionsby trans-[RuCl2{P(OR)3}4] complexeswithdifferentalkylchainligands(R ¼ C2H5, C2H5Cl, nC4H9, iC3H7 o-tolyland tC4H9) was investigated.NoneoftheacceptorRu(II)phosphitecomplexeswereluminescent,andtherateconstants of thebimolecularsystemweredeterminedwithintherangeof1.15and0.28108M1 s1 for R ¼ C2H5 and tC4H9, respectively.Theresultsindicateadirecteffectofthealkylchainsintherateconstants, showing adecreaseof kq as afunctionofincreasedofthealkylchains(R)intheruthenium(II) tetraphosphitecomplexes.ThegreatertheRgroupcontentinthephosphiteligand,themoredifficult the electrontransfer is.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
