The luminescence of some lanthanide decatung-states and other polytungstates

Structure of a photoluminescent polyoxotungstoantimonate

“…A similar spectrum was reported for Na9[Gd(WsO 18)2]. 18H20 (Blasse, Dirksen & Zonnevijlle, 1981b). The relative yield of the luminescence from the O---,W LMCT state for Ks.sH1.s[SbW6024].6H20 was 2.5 times higher than for Na9[Gd(WsO~8)2].18H20, when the samples were exposed to 290 nm light at 77 K.…”

“…However, there is no observable luminescence from the O--,W LMCT states for the above compounds. Although the photoluminescence of the polyoxotungstates consisting of WO6 octahedra can be expected, only one polyoxotungstate Na9[Gd-(WsOis)2].18H20 (Blasse, Dirksen & Zonnevijlle, 1981b) does photoluminesce and the photoluminescence from the O---,W LMCT state peaks around 510nm with a broad band. Recently we found a photoluminescent polyoxotungstate, .6H20, which exhibits green emission on O---,W LMCT photoexcitation below room temperature.…”

Interpretation of europium(III) spectra

“…[50,[366][367][368][369][370][371]. This mechanism is also responsible for the sensitization of the luminescence in europium(III)-doped polyoxometalate complexes [272,[372][373][374][375]. In all these chromophores the intense absorption bands are oxygen-to-metal charge-transfer bands.…”

Investigation on fluorescence properties of ultrafine PVA fiber mats‐contained polyoxometalate with different molecular structure

“…7 F j (j¼0, 1, 2, 3, 4) transitions. 31 The emission wavelengths with their assignments are listed in Table II 11 /PVA ultrafine fiber mats and higher than 0.69 in the EuPW 11 solid. This result gives another evidence for lower site symmetry of Eu 3þ in the ultrafine fiber mats.…”