An organic-inorganic hybrid dimeric arsenotungstate [enH(2)](4){[Cu(en)(2)] [(A-beta-H2AsW9O34)Cu(en)(2)](2)}center dot 8H(2)O established by two trivacant Keggin [A-beta-AsW9O34](9-) fragments in the opposite orientation

作者：Liu Yun; Shi Dongying; Zhao Junwei^*; Chen Lijuan; Wang Zhiqiao; Ma Pengtao; Niu Jingyang

来源：Inorganic Chemistry Communications, 2011, 14(7): 1178-1182.

DOI：10.1016/j.inoche.2011.04.021

• Polyoxometalate
• Arsenotungstate
• Copper
• Trivacant Keggin structure

A novel organic-inorganic hybrid dimeric arsenotungstate [enH(2)](4){[Cu(en)(2)] [(A-beta-H2AsW9O34)Cu(en)(2)](2)}center dot 8H(2)O (1) has been prepared by reaction of Na-8[A-alpha-HAsW9O34]center dot 11H(2)O with CuCl2 center dot 2H(2)O and ErCl3 in the presence of ethylenediamine (en) under hydrothermal conditions and structurally characterized by elemental analyses. IR spectra, UV spectra, powder X-ray diffraction (PXRD) and single-crystal X-ray diffraction. The skeleton of 1 exhibits an interesting centric dimeric structure formed by two opposite trivacant Keggin [(A-beta-H2AsW9O34)Cu(en)(2)](5-) subunits linked by a [Cu(en)(2)](2+) connector, which represents a rare organic-inorganic hybrid arsenotungstate consisting of [A-beta-AsW9O34](9-) fragments. Interestingly, the trivacant Keggin precursor [A-alpha-AsW9O34](9-) has been isomerized to the trivacant Keggin fragment [A-beta-AsW9O34](9-) in 1 under hydrothermal conditions. The photocatalytic measurement illustrates that 1 can effectively inhibit the photodegradation of rhodamine-B.

• 出版日期2011-7
• 单位河南大学