Secondary spacer modulated assembly of polyoxometalate based metal–organic frameworks

Abstract

To investigate the influence of a secondary spacer on the resulting structures of POMOFs containing pytz, five new compounds with different dimensionalities, [Cu(5)(2-pytz)(6)(H(2)O)(4)][SiMo(12)O(40)]·3H(2)O (1), [Cu(3)(2-pytz)(4)bipy][H(2)SiMo(12)O(40)]·bipy (2), [Cu(3)(2-pytz)(2)(bipy)(4)(H(2)O)(6)][H(4)SiW(12)O(40)](2)·6H(2)O (3), [Cu(2)(2-pytz)(phen)(OH)](2)[SiW(12)O(40)]·H(2)O (4), [Cu(3)(4-pytz)(4)(H(2)O)(4)][H(2)SiW(12)O(40)]·2H(2)O (5), were synthesized. When only 2-pytz was employed, compound 1 with a 3D framework was obtained, whereas when the secondary spacers (4,4'-bipy, phen and 4-pytz) were introduced into the reaction system of 1, compounds 2-5 were obtained and exhibit a broad range of structures, including 0D, 1D, 2D and 3D frameworks. It can be observed from the architectures of compounds 1-5 that the secondary spacers have a great effect on the structures of the MOFs, which results in the formation of various dimensional POMOF compounds. Additionally, photocatalytic experiments of 1-5 for the photocatalytic degradation of RhB under UV irradiation were also investigated.

Assembly of three new POM-based Ag(I) coordination polymers with antibacterial and photocatalytic properties

“…In this article, we choose three different rigid N-donor ligands, 2,2′-bipyridine (bpy), 2,2′-biimidazole (H 2 biim) and 4-(1H-tetrazol-5-yl)pyridine (pytz) (Scheme S1), to assemble with AgNO 3 at the present of Keggin type H 3 PW 12 O 40 Á xH 2 O (PW 12 ) to synthesis polynuclear silver CPs. Increasing N atoms induces the assembly of silver ions, so it contributes to the forming of higher dimensional polynuclear silver compounds [29][30][31] shows a 3D supramolecular framework based on 0D moieties while compound 2 exhibits an attractive 2D biologic helical network. Compound 3 displays a 3D structure in the presence of Ag (I) Á Á Á π interactions, π Á Á Á π stacking and weak Ag Á Á Á Ag interactions.…”

Two Coordination Polymers Constructed from 5‐(4‐Pyridyl)‐1H‐tetrazole Ligands with Different Organic Carboxylates: Structure and Luminescence Properties

“…[15][16][17][18][19][20][21] This ligand is able to coordinate with various metal ions in different coordination modes to form a series of CPs with unique topologies and desirable properties. However, most of the CPs based on H 4 ptz use this compound as unique ligand or employ inorganic anions as coligands.…”

Building Block Controlled Cd(II) Coordination Polymers from One Dimension Chain to Three Dimension Network

“…organonitrogen compounds, e.g. 5-(pyridyl) tetrazolate (bytz) [30][31][32], 4/3-pyrid-5-(1H-1,2,4-triazol-3-yl)-1,2,4-triazolyl (pyttz) [33], 1,2-bis(4-pyridyl)ethane (bpe) [34][35][36][37], 1,3-bi(4-pyridyl)propane (bpp) [38][39][40][41], etc. have been widely used for design and synthesis of functional crystalline coordination polymers.…”