title: Spectroscopic properties of neodymium(III)-containing polyoxometalates in aqueous solution.
abstract: The spectroscopic properties of the neodymium(III)-containing polyoxometalates (POMs) [Nd(PW(11)O(39))(2)](11-), [Nd(PMo(2)W(9)O(39))(2)](11-), [Nd(PMo(4)W(7)O(39))(2)](11-), [Nd(PMo(6)W(5)O(39))(2)](11-), [Nd(SiMo(2)W(9)O(39))(2)](13-), [Nd(P(2)W(17)O(61))(2)](17-), [NdW(10)O(36)](9-), [NdP(5)W(30)O(110)](12-) and [NdAs(4)W(40)O(140)](25-) are described. Absorption spectra of aqueous solutions of the complexes have been recorded and the transition intensities are parameterised in terms of the Judd-Ofelt intensity parameters Omega(lambda) (lambda=2, 4, 6). Marked differences were found between the luminescence lifetimes of the complexes of the type Nd(POM) and those of the type Nd(POM)(2), due to a better shielding of the neodymium(III) ions from the bulk water molecules in the latter type of complexes.
authors.affiliation: Faculty of Chemistry, Adam Mickiewicz University, 60-780 Poznań, Poland.
authors.forename: Slawomir
authors.initials: S
authors.lastname: But
authors.forename: Stefan
authors.initials: S
authors.lastname: Lis
authors.forename: Rik Van
authors.initials: RV
authors.lastname: Deun
authors.forename: Tatjana N
authors.initials: TN
authors.lastname: Parac-Vogt
authors.forename: Christiane
authors.initials: C
authors.lastname: Görller-Walrand
authors.forename: Koen
authors.initials: K
authors.lastname: Binnemans
mesh_terms: D008163:Luminescent Measurements; D009354:Neodymium / Q000032:analysis*; D009566:Nitrates / Q000737:chemistry*; D012996:Solutions; D013055:Spectrophotometry, Infrared; D014867:Water
chemical_list: D009566:Nitrates; D012996:Solutions; D014867:Water; D009354:Neodymium