Selective determination of ascorbic acid with a novel hybrid material based 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid and the Dawson type ion [P2Mo18O62]6− immobilized on glassy carbon

Synthesis, structure and electrochemical properties of a Fe III –Ce III heterometallic sandwich-type tungstoantimonate with novel 2-D infinite structure [Ce(H 2 O) 8 ][Ce(H 2 O) 6 ][Fe 4 (H 2 O) 10 (B-β-SbW 9 O 33 ) 2 ]·16H 2 O

“…With the pH value decreases from 1.86 to 1.25, the current gradually decreases. Such electrochemical behavior of 1 is consistent with the previous reports, which highlights the significance of protons in the electrochemistry of POMs [36]. Additionally, the influence of the scan rate on the cyclic voltammetry behavior of 1 has been also probed from 15 to 30 mV·s −1 in the potential range of −0.9 to 1.0 V in the aforementioned conditions (Fig.…”

“…Expectedly, the Fe III -based wave is observed at the more positive potential than the W VI -based waves. Notably, the reduction of POMs can not only increase the negative charge but also can improve the basicity of the polyoxoanion, thus, the concomitant protonation may exist in the reduction process of POMs [36]. To investigate the influence of the variation of the pH value of the supporting electrolyte on the electrochemical response of 1, H 2 SO 4 was utilized to adjust the pH values of medium.…”

Fabrication of carbon paste electrode containing a new inorganic–organic hybrid based on [SiW12O40]4− polyoxoanion and Nile blue and its electrocatalytic activity toward nitrite reduction

“…Inorganic-organic hybrid POM-based materials with organic or biochemical substances have led to great achievements in the recent years, as they combine both inorganic and organic merits, possess new synergistic properties and poor solubility in water and in common organic solvent [19,20]. Several organic compounds have been used for the synthesis of POM-based hybrid materials [21][22][23][24][25]. Among them, organic dyes have a large planar conjugated π system and are excellent electron donors, offering the opportunity to be a good candidate to form POM-based charge transfer salts with a mixed valence state on the organic and inorganic units [26].…”

A series of new polyoxometalate-based metal–organic complexes with different rigid pyridyl-bis(triazole) ligands: assembly, structures and electrochemical properties

“…Such an electrochemical behaviors of 1-, 2-, and 5-CPEs is consistent with the previous reports, which highlights the signicance of protons in the electrochemistry of POMs. 36 The results indicate that the title…”