A 3D all-inorganic architecture based on the [H2W12O42](10-) building block with different alkaline-earth metal linkers: crystal structures, surface photovoltage and photoluminescent properties

作者：Cui, Keyu^*; Li, Fengyan; Xu, Lin; Wang, Yuchao; Sun, Zhixia; Fu, Honggang

来源：CrystEngComm, 2013, 15(23): 4721-4729.

DOI：10.1039/c3ce40222c

• PARADODECATUNGSTATE-B CLUSTER
• POLYOXOMETALATE-BASED COMPLEX
• 3-DIMENSIONAL FRAMEWORK
• MAGNETIC-PROPERTIES
• RARE-EARTH
• GD-III
• LANTHANIDE
• CHEMISTRY
• SR
• SPECTROSCOPY

Three-dimensional (3D) all-inorganic polyoxometalate compounds, Ca2Na6[H2W12O42]center dot 30H(2)O (1), Sr4H2[H2W12O42]center dot 26H(2)O (2), Sr4Na2[H2W12O42]center dot 30H(2)O (3) and Ba4Na2[H2W12O42]center dot 29.5H(2)O (4) have been synthesized and their structures consist of [H2W12O42](10-) building units and alkaline-earth metal cations (Ca2+, Sr2+ and Ba2+) as linkers. The most interesting feature is that compound 2 represents the first example of a 3D all-inorganic framework in which the paradodecatungstate-B anions [H2W12O42](10-) were linked by pure alkaline-earth metal cations. Moreover, each [H2W12O42](10-) building unit in compound 2 acts as a decadentate ligand coordinated with ten Sr2+ ions, which represents the highest coordination number of [H2W12O42](10-) with alkaline-earth metal cations so far. Another interesting feature is that compounds 1-4 exhibit a clear response to surface photovoltage and electric field-induced surface photovoltage, which is indicative of the semiconductor property and suggests these compounds have potential applications as photocatalysts and light-to-electricity conversion materials.

• 出版日期2013
• 单位黑龙江大学; 吉林师范大学; 东北师范大学