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Abstract
Two new Wells–Dawson based compounds containing alkali metals, [Ag(H2biim)2]2·[Ag5(H2biim)10Na2(H2O)2(H3/2P2W18O62)2]·12H2O (1) and [Cd(H2biim)2 K(P2W18O62)1/2] (2) (H2biim = 2,2′-biimidazole), have been synthesized under hydrothermal conditions. In 1, two-supporting Wells–Dawson anions are linked by a [Ag(H2biim)2]+ subunit to form a dimer. The adjacent dimers are further connected by Na+ through (POM)O-Na-O(POM) bonds to build a 1-D chain. In 2, adjacent anions are linked by two [Cd2(H2biim)2]4+ subunits and a 1-D chain is formed. Furthermore, the anion in the chain is fused by six K+ ions and a 3-D framework is obtained. The alkali metals exhibit crucial influence on the conversion of dimensionality assisting anions and Ag-H2biim subunits to construct 1-D and 3-D frameworks. The electrochemical and photocatalytic properties of 1 and 2 have been investigated.
Graphical Abstract
Funding
This work was supported by the National Natural Science Foundation of China [grant numbers 21101015, 21171025, and 21201021]; the Program for New Century Excellent Talents in University [NCET-09-0853]; the Program of Innovative Research Team in University of Liaoning Province [LT2012020]; Doctoral Initiation Project [grant number 20111147] of Liaoning Province and Talent-supporting Program Foundation of Education Office of Liaoning Province [LJQ2012097].
