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A new inorganic–organic POM-based hybrid material comprising Keggin type mono manganese substituted phosphotungstate and enantiopure S-(+)-sec-butyl amine was synthesized in an aqueous media by simple ligand substitution method. The synthesized hybrid material was systematically characterized in solid as well as solution by various physicochemical...
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Context 1
... 4 shows the structure of SBA. The chemical shift of 13 C NMR spectrum for SBA as well as PW 11 Mn-SBA is presented in Table 2. As shown in Table 2, no significant shift in a CH 3 carbon indicates that the amine remains intact in the synthesized material. ...
Context 2
... chemical shift of 13 C NMR spectrum for SBA as well as PW 11 Mn-SBA is presented in Table 2. As shown in Table 2, no significant shift in a CH 3 carbon indicates that the amine remains intact in the synthesized material. The considerable upfield shift was observed for b CH 3 and c CH 2 and downfield shift was observed for d CH. ...
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Citations
Thermolysis of ferrocenium tungstophosphate [(C5H5)2Fe]3[PW12O40]∙H2O and tungstophosphatoferrates with the general formula of Cat4[PW11O39Fe(H2O)]∙ m H2O, where Cat = (NH4)+, Rb+, Cs+, (CH3)4N+, with the Keggin anion structure were studied using differential scanning calorimetry, infrared spectroscopy, X-ray phase analysis, and electron microscopy. The crystalline products of their thermal decomposition - phases with the structure of pyrochlore and tungsten bronzes - were identified. The synthesized compounds are catalysts for the oxidation reactions of organic compounds and the production of carbon nanomaterials.
A discrete class of metal–oxygen clusters, Polyoxometalates (POMs) have received tremendous attention for their convenient shapes, sizes, compositions and structural diversities. Amongst their numerous advantages, one that stands out is their ability to be modified at molecular level, giving rise to second, third and even fourth generation materials. In this regard, Transition Metal Substituted Polyoxometalates (TMSPOMs), a subclass of POMs, are extremely relevant even today. Amongst, Mn substituted POMs (Mn-POMs) visibly attract significant attention due to variable oxidation states, redox and magnetic properties. Mn-POMs, themselves comprise an entire arena of inorganic building blocks with large assortments of morphologies, structural flexibility and functionality. Herein, we have compiled the different syntheses, strategies for modification, characterizations as well as diverse applications of Mn containing Keggin and Dawson POMs. We have also catalogued the available literature on the synthesis and applications of Mn-POMs, modified via functionalization as well as supporting. Our intension behind this review is to provide readers, in-depth insights, and a fundamental, representative and comprehensive overview of the work done so far in this emerging field, emphasizing on industrially viable catalytic systems. Thus, the article would appeal not only to POMs community but also to Crystallographers, electrochemists as well as physical chemists.
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