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Inne
Optical spectroscopy of europium nitrate with 2,2'-bipyridine Eu(NO3)3·Bpy3. One more of compounds with outer-sphere Bpy molecule ?.
Autorzy
Rok wydania
2004
Czasopismo
Journal of Alloys and Compounds
Numer woluminu
380
Strony
418-425
DOI
10.1016/j.jallcom.2004.03.068
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The complex compound Eu(NO3)3·Bpy3 (Bpy, 2,2′-bipyridine) was synthesised and analysed by methods of optical spectroscopy. The spectra and details of the structure were discussed and compared with ones of well-known compounds Eu(NO3)3·Bpy2 and Eu(NO3)3·Phen2 (Phen, 1,10-phenanthroline). The water admixed to the ethanol as solvent promotes Bpy building into the outer sphere of complex [Eu(NO3)3·Bpy2]·Bpy. Both kinds of Bpy molecules in Eu(NO3)3·Bpy3 compound are nearer to coplanar, than Bpy in Eu(NO3)3·Bpy2. The bonds Eu–N are stronger and the bonds Eu–O are weaker in Eu(NO3)3·Bpy3 in comparison with the ones in Eu(NO3)3·Bpy2. The outer-sphere Bpy molecule, effecting as a “steric” factor, changes the nearest surroundings of Eu3+ ion in [Eu(NO3)3·Bpy2]·Bpy, making it similar to one of Eu(NO3)3·Phen2.
Słowa kluczowe
Europium nitrates, Raman spectra, IR spectra, Luminescence spectra, Luminescence excitation spectra
Adres publiczny
https://doi.org/10.1016/j.jallcom.2004.03.068
Strona internetowa wydawcy
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