Supramolecular assembly based on Keggin cluster and basketlike cage

Abstract

A novel supramolecular compound based on the Keggin cluster and basketlike cage (C 10 H 10 N 2 ) 12 (PMo VI 12 O 40 ) 2 (Sr ⊂ P 6 Mo 3 V Mo 15 VI O 73 ) 2 ·9H 2 O ( 1 ), has been hydrothermally synthesized and characterized by elemental analysis, IR, TG, XPS, UV and single-crystal X-ray diffraction. In compound 1 , the basketlike polyanion uses its surface oxygen atoms to attract nine basket cages and five Keggin clusters via strong supramolecular interactions. Meanwhile, each of Keggin cluster is surrounded by its neighboring five basket cages in the same mode to form a 3D supramolecular framework with chambers, and 4,4′-bipy organic molecules are located in the chambers to stabilize the whole structure. The electrochemical and electrocatalysis behavior of 1-CPE have been studied in detail. A supramolecular compound based on the Keggin cluster and badsketlike cage (C 10 H 10 N 2 ) 12 [(PMo VI 12 O 40 ) 2 (Sr ⊂ P 6 Mo 3 V Mo 15 VI O 73 ) 2 ]·9H 2 O ( 1 ), is reported. The structure of compound 1 proves feasibility of the coexistence of two kinds of heteropolyanions in one compound. Electrochemical analysis shows that 1-CPE displays unique redox properties and good electrocatalytic activity to reduce nitrite. ► A supramolecular compound based on the Keggin and badsketlike cage is reported. ► 1-CPE displays unique redox properties and electrocatalytic activity to nitrite. ► The work proves the feasibility of the coexistence of two kinds of POMs. ► Compound 1 provides prototype for design of compounds based on two kinds of POMs.