| Autor: |
Guang-Gang Gao, Chao-Yu Song, Xi-Ming Zong, Dong-Feng Chai, Hong Liu, Yu-Long Zou, Jian-Xun Liu, Yun-Feng Qiu |
| Předmět: |
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| Zdroj: |
CrystEngComm; 2014, Vol. 16 Issue 23, p5150-5158, 9p |
| Abstrakt: |
Four three-dimensional lanthanide-polyoxometalate complexes, [K4Ln3(H2IDC)3(HIDC)3(H2O)3(SiW12O40)]·nH2O (Ln = La (1), n = 7 and Ce (2), n = 6; H3IDC = 4,5-imidazoledicarboxylic acid) and [Ln4(HIDC)4(H2O)8(SiW12O40)]·11H2O (Ln = La (3) and Ce (4)), have been synthesized by solvothermal reactions. Compounds 1 and 2 are 3D architectures that include 2D layered structures connected by K+ cations, which were realized by tuning the reaction media with different ratios of water and ethanol. By comparison, in the cases of 3 and 4, lanthanide ions coordinate to tridentate HIDC ligands forming 2D Ln-organic networks, which are further pillared by α-Keggin type [SiW12O40]4- polyoxoanions and thus constructing new 3D frameworks featuring 1D channels along the a and b axes. All of these complexes could induce the formation of Ag nanocomposites possessing high catalytic activity towards the reduction of 4-nitrophenol (4-NP) in the presence of NaBH4. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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