Repozytorium
Wyszukaj
Kolekcje
Inne
Crystal structure and absorption spectroscopy of a dimeric neodymium(III) complex with triethylenetetraaminehexaacetic acid. (H6ttha), Na0.5H5.5[Nd2(ttha)2].7.5 NaClO4.16.83 H2O.
Autorzy
Rok wydania
1998
Czasopismo
Journal of the Chemical Society, Dalton Transactions
Strony
859-863
DOI
10.1039/A707404B
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The crystal structure and absorption spectra (IR, UV/VIS) have been determined for Na0.5H5.5[Nd2(ttha)2]· 7.5NaClO4·16.83H2O (H6ttha = triethylenetetraaminehexaacetic acid). The structure consists of the complex dimer, perchlorate anions, sodium cations and water of hydration. Both neodymium(III) ions are nine-co-ordinate. Each ttha ligand is bonded to one NdIII through four of its carboxyl oxygen atoms and three of its nitrogen atoms. Two carboxyl oxygen atoms are bonded to the other NdIII, and the fourth nitrogen atom remains unco-ordinated. The co-ordination spheres of both NdIII are essentially the same and may be defined as distorted tricapped trigonal prisms. Absorption spectra of a single crystal were measured at room and liquid-helium temperatures. The intensities of the f–f transitions were analysed on the basis of Judd–Ofelt theory. Comparison of the absorption spectra of [Nd(ttha)]3– in solution to those of single crystals of Na3[Nd(ttha)]· 2.5NaClO4·7.617H2O and Na0.5H5.5[Nd2(ttha)2]·7.5NaClO4·16.83H2O compounds allowed us to estimate the ratio of mono- to di-meric species in solution.
Adres publiczny
DOI https://doi.org/10.1039/A707404B
Strona internetowa wydawcy
Podobne publikacje
Structure and photophysical properties of new lanthanide (III) complexes [Ln(C10H8O6)1.5(H2O)3]·H2O.
Gawryszewska Paula, Ciunik Leszek Z.
Structure and phase transition in the (C5H10NH2)SbCl6·(C5H10NH2)Cl crystal.
Bednarska-Bolek Beata, Pietraszko Adam, Jakubas Ryszard, Bator Grażyna , Kosturek Bogdan