17O and 183W NMR diamagnetic and paramagnetic shifts in heterodecatungstates (X = Ln, Th, U) in aqueous solutions

Oxygen-17 NMR spectroscopy: Basic principles and applications (part II)

“…correlates with T À1 , confirming the dominant contact shift for these oxygen atoms. It was demonstrated [803] that water molecules do not exist in the first coordination sphere of the heteropolyanions.…”

“…The complexation of dysprosium(III) with a series of (hydroxy) carboxylates in aqueous solution has been investigated by 17 [802,803]. It was shown that the X-ray structure of the heteropolyanions, where X occupies the centre of a square antiprism formed by two W 5 O 18 ligands (Fig.…”

Present General Status of Understanding of Heteropoly Electrolytes and a Tracing of Some Major Highlights in the History of Their Elucidation

“…The 17 O and 183 W NMR chemical shifts and status of the complex [XW 10 O 36 ] n - in aqueous solution were reported (X = La 3+ − Er 3+ , Ce 4+ , Th 4+ , U 4+ ). The character of the lanthanide-induced chemical shifts was discussed .…”

Yttrium containing head-on complexes of silico- and germanotungstate: Synthesis, structure and solution properties

“…Yttrium containing POM [YW 10 O 36 ] 9À was first reported by Peacock and Weakley in 1971 [12], whereas detailed characterizations with 89 Y, 17 O, and 183 W NMR spectroscopy were performed considerably later [13,14]. Very recently, Kortz [15a,15b].…”