Charge transfer and f-f transitions studied by photoacoustic spectroscopy of [R(NO3)2(PicBH)2]NO3 and [R(NO3)3(PicBH)2] complexes (R - rare earth ion)

摘要: High-resolution photoacoustic spectra of trinitrato-bis[N-(2-pyridyl-methylene)-N'-benzoyl-hydrazine]R(III), (R = La, Ce, Pr), and binitratobis[N-(2-pyridylmethylene)-N'-benzoyl-hydrazine]R(III) nitrate (R=Y, Nd, Eu, Yb, Tb, Gd, Ho, Dy, Er) complexes, in the visual region, were studied for powder samples. Very intense various shapes attributed to intraligand transitions π → π* type located mainly on C=N group n carbonyl group. The intensity these essentially depends rare earth ions. existence f-f electron could influence relaxation processes, which play an important role determination above transitions. For many investigated samples energy levels excited states ions identified (f-f transitions). radiation some compared with d-d certain copper(II) organometallic are very biogenic systems. correlation between localized extended wave functions is suggested.