Jump to main content
Jump to site search

Issue 18, 2017
Previous Article Next Article

Self-assembly of polyoxometalate-based hybrid aggregates: from a monomer to dimers by changing the pH value of reaction systems

Author affiliations

Abstract

Three new compounds have been synthesized at different pHs under identical hydrothermal conditions, namely, (H2bimb)[Cu(bimb)3(H2O)2(H2P2W18O62)]·4H2O (1), (H2bimb)3[Cu2(bimb)5(H2O)4(HP2W18O62)2]·9H2O (2), and (H2bimb)5[Cu(bimb)2(H2O)2(P2W18O62)2]·8H2O (3) (bimb = 4-bis(imidazol-1-yl)benzene). Their structures were determined using single crystal X-ray diffraction analyses and characterized using routine methods. When the pH was adjusted to 2.0–2.5, compound 1 was obtained, which is a monomer. Compounds 2 and 3 were obtained at pH values of 2.5–3.2 and 3.2–4.0, which are two kinds of distinct dimers (I and II), respectively. The pH of the reaction plays a key role in the assembly of POM-based hybrid aggregates. Electrochemical experiments indicate that a 1-based carbon paste electrode (1-CPE) exhibits high catalytic efficiency and high stability towards reduction of NO2. Namely, the electrocatalytic efficiency towards the reduction of NO2 is ca. 235% in 1 M H2SO4 containing 50 mM NO2, and the current signal after 100 cycles exhibits almost no loss for the 1-CPE.

Graphical abstract: Self-assembly of polyoxometalate-based hybrid aggregates: from a monomer to dimers by changing the pH value of reaction systems

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 Jul 2017, accepted on 08 Aug 2017 and first published on 08 Aug 2017


Article type: Paper
DOI: 10.1039/C7NJ02475D
Citation: New J. Chem., 2017,41, 10148-10154
  •   Request permissions

    Self-assembly of polyoxometalate-based hybrid aggregates: from a monomer to dimers by changing the pH value of reaction systems

    S. Li, L. Zhang, D. Chai, H. Pang and H. Ma, New J. Chem., 2017, 41, 10148
    DOI: 10.1039/C7NJ02475D

Search articles by author

Spotlight

Advertisements