Jump to main content
Jump to site search

Issue 41, 2018
Previous Article Next Article

Novel polyoxometalate-based cobalt complexes based on rigid pyridyl-triazole-tetrazole and pyridyl-bis(triazole) ligands

Author affiliations

Abstract

Three novel polyoxometalate (POM)-based metal–organic complexes (MOCs) constructed from rigid pyridyl-triazole-tetrazole and pyridyl-bis(triazole) ligands have been hydrothermally synthesized and structurally characterized: [Co3(Htyptz)2(γ-Mo8O26)(H2O)6]·4H2O (1), H2[Co3(Htyptz)2(TeMo6O24)(H2O)8]·6H2O (2), [Co3(Hpyttz)2(γ-Mo8O26)(H2O)8]·2H2O (3) (H2typtz = 3-(tetrazol-5-yl)-5-(pyrid-3-yl)-1,2,4-triazolyl, H2pyttz = 3-(pyrid-4-yl)-5-(1H-1,2,4-triazol-3-yl)-1,2,4-triazolyl). Single-crystal X-ray diffraction analyses reveal that complex 1 is a 3D metal–organic framework. Both 2 and 3 are 2D metal–organic architectures. In complex 1, the adjacent [γ-Mo8O26]4− anions are linked by the CoII ions to form a 1D Co-γ-Mo8O26 inorganic chain. Then the 1D Co-γ-Mo8O26 inorganic chains are linked together by the 1D metal–organic Co-Htyptz chains to form a 3D framework. In complex 2, the adjacent Co-Htyptz metal–organic chains are connected by TeMo6 polyoxoanions to form a 2D architecture. In complex 3, [γ-Mo8O26]4− anions are bridged by the CoII ions to give similar 1D Co-γ-Mo8O26 inorganic chains to those in 1, which are connected through [Co(Hpyttz)2] units to form a 2D network. 1 and 2 represent the first examples of POM-based MOCs derived from H2typtz. The effects of the POM type and different ligands on the structures of the title complexes were discussed. The adsorption activities for organic dyes methylene blue (MB), gentian violet (GV), methyl orange (MO), rhodamine B (RhB), neutral red (NR) and safranin T (ST) have been investigated in detail. Furthermore, the electrochemical properties of 1 and 2 have been studied, which display electrocatalytic activities toward the reduction of nitrite and bromate. 1-CPE shows pH-dependent electrochemical behaviors and may be used as a potential sensor.

Graphical abstract: Novel polyoxometalate-based cobalt complexes based on rigid pyridyl-triazole-tetrazole and pyridyl-bis(triazole) ligands

Back to tab navigation

Supplementary files

Publication details

The article was received on 14 Jul 2018, accepted on 18 Sep 2018 and first published on 20 Sep 2018


Article type: Paper
DOI: 10.1039/C8CE01158C
Citation: CrystEngComm, 2018,20, 6438-6448
  •   Request permissions

    Novel polyoxometalate-based cobalt complexes based on rigid pyridyl-triazole-tetrazole and pyridyl-bis(triazole) ligands

    X. Wang, X. Bai, H. Lin, J. Sun, G. Liu and X. Wang, CrystEngComm, 2018, 20, 6438
    DOI: 10.1039/C8CE01158C

Search articles by author

Spotlight

Advertisements