Lewis Acid Guests in a {P₈W₄₈} Archetypal Polyoxotungstate Host: Enhanced Proton Conductivity via Metal‐Oxo Cluster within Cluster Assemblies

Abstract

Complexes made by hosts that completely surround their guests provide a means to stabilize reactive chemical intermediates, transfer biologically active cargo to a diseased cell, and construct molecular‐scale devices. By the virtue of inorganic host–guest self‐assembly, nucleation processes in the cavity of a {P8W48}‐archetype phosphotungstate has afforded a nanoscale 16‐AlIII‐32‐oxo cluster and its GaIII analogue that contain the largest number of AlIII/GaIII ions yet found in polyoxometalate (POM) chemistry. Interestingly, the rich Lewis acid AlIII centers within the Lewis base POM support shows an exceptional proton conductivity of 4.5×10−2 S cm−1 (85 °C, 70 % RH; RH: relative humidity), which is by far the highest conductivity reported among POM‐based single‐crystal proton conductors.

Polyoxometalates: Tailoring metal oxides in molecular dimension toward energy applications

“…The electrochromic properties are available in K 6 P 2 W 18 O 62 when it is combined with TiO 2 nanowires, resulting in excellent switching and transmittance properties . Polyoxotungstates have been employed in a number of energy conversion and storage applications and sensors …”

Using NMR spectroscopy to investigate the role played by copper in prion diseases

“…Such identification is not possible with the 1D approach. For example, various homo-nuclear 2D 1 H-1 H-NMR experiments, including total correlation spectroscopy (TOCSY) [225][226][227][228][229][230][231][232][233][234], correlation spectroscopy (COSY) [219,[234][235][236][237][238][239][240][241], and heteronuclear experiments such as 1 H, 13 C-single quantum coherence ( 1 H-13 C-HSQC) and heteronuclear multiple bond correlation (HMBC) have been routinely used in to assign protein signals and to study protein interactions with ligands in drugs and small molecules [242]. Here, we present heteronuclear single-quantum coherence spectroscopy (HSQC) as an example of the most powerful approaches used to assign signals and to probe ligand protein interactions [243].…”

Multicomponent Cooperative Assembly of Nanoscale Boron-Rich Polyoxotungstates with 22 and 30 Boron Atoms

“…have rendered new POTs a prime target in new materials design. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Due to the interesting magnetic and electronic properties of transition metals (TMs), one of the most extensive studies in new POTs design is the introduction of TMs or TM-oxo clusters into POTs for creating TM-incorporated POTs. After decades of effort, a library of TM-incorporated POTs has been synthesized and constitutes the largest subclass of POTs.…”