Hydrothermal Synthesis, Structures and Properties of Two Silver-Containing Organic-Inorganic Hybrids Based on Precursor [AlW12O40]5-

作者：He, Dan-Feng; Liu, Hong-Sheng^*; Ci, Cheng-Gang; Jin, Zhong-Xin; Li, Ning; Dong, Hai-Bo; Yu, Yi-Qing; Zhang, Chun-Yan; Hu, Mei-Juan

来源：Journal of Cluster Science, 2015, 26(5): 1557-1566.

DOI：10.1007/s10876-015-0850-5

• Polyoxometalate
• Silver
• Photocatalysis
• Precursor

Two new silver-containing inorganic-organic hybrid compounds [Ag(2-MMIZ)(2)](6){[Ag(2-MMIZ)(2)](2)[Ag(2-MMIZ)](2)[AlW12O40](2)} (1) and [Ag(2-MMIZ)(2)](5)[AlW12O40] (2) based on Keggin polyoxometalates and Ag complex have been successfully synthesized by reaction of AgNO3, 2-MMIZ (2-methylimidazole), and the alpha-Na-5[AlW12O40]center dot 13H(2)O precursor under hydrothermal conditions, and these two compounds were well characterized by elemental analyses, IR spectrum, UV-Vis spectrum, Thermogravimetric analyses, Powder X-ray diffraction measurements and single-crystal X-ray diffraction. The structure of Compound 1 represents the first dimer anion {[Ag(2-MMIZ)(2)](2)[Ag(2-MMIZ)](2)[AlW12O40](2)}(6-) and six free [Ag(2-MMIZ)2](+) segments as cations, among the five crystallographically independent of [Ag(2-MMIZ)] segments in 1, Ag atoms exist three types of coordination configurations including linear, triangular and T type. Compound 2 is composed of one alpha-Keggin polyoxoanion [AlW12O40](5-) and five free [Ag(2-MMIZ)(2)](+) segments as cations, there is only a linear coordination mode of Ag atoms in 2. Compounds 1 and 2 show photocatalytic activity for degradation of organic dye Rhodamine-B. @@@ The first dimmer anion {[Ag(2-MMIZ)(2)](2)[Ag(2-MMIZ)](2)[AlW12O40](2)}(6-) based on [Ag(2-MMIZ)](+) cations, [Ag(2-MMIZ)(2)](+) cations and [AlW12O40](5-) polyoxoanions can be used for degradation of organic dye Rhodamine-B.

• 出版日期2015-9
• 单位大庆师范学院