Cation-induced assembly of the first mixed molybdenum–vanadium hexadecametal host shell cluster anions

Hydrothermal synthesis, characterization and properties of bi-capping pseudo-Keggin type tungstovanadophosphate compound:

“…In the last few years, great advancement in the field of polyoxometalates chemistry has been study of the capping structural polyanions. To date, bi-capping Keggin and pseudo-Keggin structural heteropolyanions of polyoxometalates have been structurally confirmed, and recently the tetra-capping Keggin structural anion [PMo 8 V 8 O 44 ] nÀ has also been characterized [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17], but very few capping Keggin type tungstovanadates were reported [18], because of the difficulties in preparing high quality single crystals. Here, we report a novel bi-capped pseudo-Keggin structural heteropoly compounds, ½Co 4 ðHPO 3 Þ 2 ðC 12 H 8 N 2 Þ 8 ðH 2 OÞ 2 ðH 3 OÞ½PW VI 9 V IV 3 O 40 ðV IV OÞ 2 Á H 2 O (1).…”

A novel 2D layer structural compound constructed from tetra-capped pseudo-Keggin heteropolytungstates interacting with copper coordination fragments:

“…During the past few years, a lot of efforts have been focused on the secondary transition-metal complexes as bridges linking POMs into high dimensional frameworks under hydrothermal conditions [6][7][8][9][10][11][12][13]. For the heteropolyanions, the Mo/V/O system has been extensively studied, and some examples of the tetra-capped pseudo-Keggin polyoxomolybdate structures have been reported [14][15][16]. The heteropolytungstates characterized by crystallography are correspondingly rare [17], In this paper, we have therefore extended our work by exploiting heteropolytungstates as building blocks, resulting in the formation of a novel 2D layer structure compound ½CuðenÞ 2 ðH 2 OÞ 2 ½CuðenÞ 2 2 ½AsW VI 2 W V 7 V IV 7 O 44 Á 2H 2 O (1), which was constructed from the first example of tetra-capped pseudo-Keggin heteropolytungstates interacting with copper coordination fragments.…”

Hydrothermal synthesis and characterization of two novel tungstovanadophosphate derivatives

“…Numerous examples of such 'mixed-addenda' compounds have been described [8][9][10][11]. The surface decoration means that the surface oxygen atoms of the anion are substituted by organic or other groups, forming so-called capped [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31], supporting [32,33], and organic group-functionalized POMs [34]. To date, several types of capped POMs have been reported, such as single-capped (pbpy) 4 [27].…”