Recent advances in isopolyoxotungstates and their derivatives

Abstract

During the past decade, isopolyoxotungstates (iso‐POTs) and their derivatives have been greatly developed due to their unique structures and potential applications in luminescence, magnetism, catalysis etc. This brief review is principally focused on the main research progress on iso‐POTs, iso‐POT‐based transition‐metal derivatives, iso‐POT‐based rare‐earth derivatives, iso‐POT‐based organometallic derivatives and iso‐POT‐based heterometallic derivatives, and gives a summary of some representative examples of their syntheses, structures and related properties. In addition, an outlook on the future of this area is presented in the final section. We believe that this systematic commentary on iso‐POTs and their derivatives will not only disclose a rich set of iso‐POT structures, but also reveal a more promising direction for the further functionalization of iso‐POTs.

Interweaving Disciplines to Advance Chemistry: Applying Polyoxometalates in Biology

“…The Lindqvist-type [W VI 6 O 19 ] 2– is only stable and redox-active in organic solvents, while the heptatungstate [W VI 7 O 24 ] 6– is stable and redox-inactive in aqueous solution. 22 The synthesis of new POM archetypes is the driving force behind the POM chemistry, whereby a small change often opens up new avenues for POM development.…”

“…Examples of “nonclassical” POTs, which exist as subunits (“virtual building blocks”) of larger classical structures, have been detected in the protein pocket of WSto [1 M (NH 4 ) 2 HPO 4 and 0.1 M sodium citrate, pH 5.6]. 23d The POT containing three W atoms with the assigned formula [W VI 3 O 10 H x N 3 ] (6– x )– (N atoms from the imidazole N ε2 atom of Hisα139) is the smallest one described so far and can be seen as a (formal) constituent of the well-known Keggin-type metatungstate [H 2 W VI 12 O 40 ] 6– 22 ( Figure 2 B). The construction of small, atypical POM clusters could be used in the future to create new, larger architectures by using the Mo/WSto protein as a suitable “nano test tube”.…”

Preparation and Application of Keggin Polyoxometalate‐based 3D Coordination polymer Materials as Supercapacitors and Amperometric Sensors

“…In the Figure 4, the CV curves exhibit three pairs of reversible redox peaks in contrast with the rectangular CV curve shapes of regular electrical double‐layer capacitor. It demonstrates that the primary contribution of the faradic capacitive behavior from the POM‐supported CPs material [46,47] . The CV curves of three compounds present a similar shape, even at 100 mV s −1 , showing that the electrodes indicate a comparatively low resistance and an outstanding electrochemical reversibility [48] .…”

“…It demonstrates that the primary contribution of the faradic capacitive behavior from the POM-supported CPs material. [46,47] The CV curves of three compounds present a similar shape, even at 100 mV s À 1 , showing that the electrodes indicate a comparatively low resistance and an outstanding electrochemical reversibility. [48] Furthermore, the CV curves' shapes change hardly and the current intensities enhance with the scan rate increasing, which illustrate these electrode materials possess a high rate capability.…”

Modified polyoxometalate: a novel monocapped bi-supporting and reduced α-Keggin structure {PMo12O40[Cu(2,2′-bpy)]}[Cu(2,2′-bpy)(en)(H2O)]2

“…Polyoxometalates (POMs), as early transition-metal oxide clusters, have attracted extensive attention in solid-state materials chemistry, due to their aesthetic architectures, compositional diversity and potential applications in the fields of catalysis, electrochemistry, luminescence, magnetism and so on (Blasco-Ahicart et al, 2018;Martin-Sabi et al, 2018;Omwoma et al, 2015;Wang & Yang, 2015). During recent decades, considerable effort has been devoted to extending the structural library of POM-based materials, especially the design and synthesis of novel inorganic-organic hybrids, arising not only from their intriguing structures and various topologies, but also as a result of greater and further potential applications (Chen et al, 2018;Liu et al, 2018;Lv et al, 2012;Zhang et al, 2019). The Keggin structure was of epoch-making significance in the history of POM chemistry (Pope, 2012) and has been extensively employed as a building block for the construction of multifunctional inorganic-organic hybrid materials due to its superiority in size suitability and structural stability (Du et al, 2014;Wang et al, 2006Wang et al, , 2008Yang et al, 2017).…”