A Macroisopolyanion of Molybdenum: Mo₃₆O

Aiding the Self‐Assembly of Supramolecular Polyoxometalates under Hydrothermal Conditions To Give Precursors of Complex Functional Oxides

“…The chemical composition of complementary precipitates and mother liquors are presented in Figure S2 MoO 2 . With increasing reaction times, the fractions of M 5 O 14 and M2 decrease while M1 becomes the main product.…”

“…This observation is in perfect agreement with the recently reported spontaneous formation of {(Mo)Mo 5 } 12 -{Mo 2 } 30 -type Keplerates by addition of preformed {Mo V O} 2+ units to an acidified molybdate solution. [14] Subsequent addition of Te and heating to 353 K causes redissolution of the pre-formed {Mo 72 [15] which are structurally more closely related to the M2 phase and to other undesired crystalline phases, such as TeMo 5 O 16 . The broad appearance between 1000 and 940 cm À1 indicate the additional contribution of macroisopolyanions [Mo 36 O 112 ] 8À (Supporting Information, Figure S3).…”

“…The broad appearance between 1000 and 940 cm À1 indicate the additional contribution of macroisopolyanions [Mo 36 O 112 ] 8À (Supporting Information, Figure S3). [14] Subsequent addition of Te and heating to 353 K causes redissolution of the pre-formed {Mo 72 12 O 36 ] 4À (773, 786, 808, 967 cm À1 ), [15] which are structurally more closely related to the M2 phase and to other undesired crystalline phases, such as TeMo 5 O 16 . Free telluric acid (644 cm À1 ), [16] Anderson-type heteropolyanions [Te-(Mo,V) 6 O 24 ] nÀ (952, 1010 cm À1 ), [17] and re-dissolved vanadium species (975, 1050 cm À1 ) are also present.…”

Formation of a Keggin-Type 12-Molybdogallate(III) Complex in Aqueous-Organic Media and the Application to the Voltammetric Determination of Gallium(III)

“…24,25 The big band at 922 cm -1 is due to the absorption of CH 3 CN. With the addition of 5 mM Ga(III), both bands at 982 and 899 cm -1 decreased in intensity with a simultaneous increase of the 954 cm -1 band.…”

Direct Synthesis and Mass Spectroscopic Observation of the {M40} Polyoxothiometalate Wheel

“…The corner Mο-O-Mo and the three-coordinate edge OMo 3 oxygen-molybdenum stretching vibrations appear at 949, 904, 867 and 701 cm -1 , respectively. [30][31][32][33] Bands due to the terminal, corner Mο-O-Mo, Mo-S-Mo and three-coordinate edge OMo 3 oxygen-molybdenum bending vibrations appear in the same region at 488, 351 and 198 cm -1 , respectively. [30][31][32] In addition to the solid state characterisation, the thiometalate ring was studied in solution using Raman spectroscopy at different concentrations of compound 1.…”