Ribeiro, Sidney José Lima [UNESP]Massabni, A. M. G. [UNESP]Stucchi, Elizabeth Berwerth [UNESP]2014-05-272014-05-271991-01-02Inorganica Chimica Acta, v. 179, n. 1, p. 67-72, 1991.0020-1693http://hdl.handle.net/11449/64114Syntheses of the following complexes are reported: LnX3·6L, LnX′3·4L, LnX″3·3L and Eu(NCS)3·3L, where Ln = Nd3+, Eu3+; L = hexamethylphosphoramide (hmpa); X = ClO4 -, PF6 -; X′ = NCS-, NO3 -, Br-, ClO4 -; X″=Cl-. Spectra of the complexes of Nd3+ (absorption) and Eu3+ (emission) in dichloromethane solutions were measured. The oscillator strengths of the Nd3+ f-f absorption bands within the 11 000-30 000 cm-1 region were determined and the τλ intensity parameters were obtained according to the Judd-Ofelt formalism. Covalency parameters were also determined for the Nd3+ complexes. The intensities relationship η21 of the 5D0→7F2 and 5D0→7F1 transitions of the Eu3+ was calculated. A good correlation between τ2 and the oscillator strength of the hypersensitive band of Nd3+ was found, as well as a correlation between τ2 and η21. There are only qualitative relations between τ2 and the covalency parameter. © 1991.67-72engArtigo10.1016/S0020-1693(00)85374-8WOS:A1991FB37100012Acesso restrito2-s2.0-4243228873644604746303465494307037142415910000-0003-3286-9440