Heteropoly blues. IV. Spectroscopic and magnetic properties of some reduced polytungstates

Photochemically reduced polyoxometalate assisted generation of silver and gold nanoparticles in composite films: a single step route

“…The formation of reduced silicotungstic acid was further confirmed by ESR studies. It is observed that the ESR spectra of photoreduced composite film exhibited a signal at g = 1.813 at 77 K, which is originating from the d 1 [25]. The reduced composite film can be re-oxidized by exposing to oxygen or any other oxidizing atmosphere.…”

A magnetically-separable H 3 PW 12 O 40 @Fe 3 O 4 /EN-MIL-101 catalyst for the one-pot solventless synthesis of 2H-indazolo[2,1- b ] phthalazine-triones

“…Characteristic charge-transfer bands were observed in the spectrum of phosphotungstic acid at 213 and 266 nm (Fig. S3b): that around 213 nm is assigned to Ot→W LMCT (ligand-to-metal-charge-transfer) and that around 266 nm is assigned to Ob1, b2→W LMCT band [52,53]. The other bands around 1168, 1103, 883 and 748 cm -1 can be attributed to C-H deformations [55].…”

Synthesis, Characterization and Electrochemistry of Complexes Derived from [(1),2,3-P2Mo2W15O61]10– and First Transition Metal Ions

“…Although no clear conclusions can be drawn, it is worth noting provisionally that it is now widely accepted that P 2 W 18 is initially reduced at one of the twelve equivalent tungsten atoms. [3,12,13] Here, the molybdenum centers, which are more easily reducible than the tungsten moieties, are situated in the "cap". On the basis of the foregoing discussion, no simple correlation is expected unless a single parameter overrides all others and/or several parameters show the same trend.…”