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The influence of coordination modes and active sites of a 5-(triazol-1-yl) nicotinic ligand on the assembly of diverse MOFs

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Abstract

Six new complexes based on 5-(triazol-1-yl)nicotinic acid (HL), namely [Cu2(L)3(H2O)(OH)]n (1), [Co(L)2(H2O)2]n (2), [Mn(L)2(H2O)2]n (3), {[Co(L)(H2O)0.5(DMF)0.5(NO3)0.5]·(Cl)0.5·DMF·2H2O}n (4), {[Cu(L)(O)0.5]·CH3OH·2.5H2O}n (5) and {[Co2(L)4(H2O)]·2DMA·2H2O}n (6), were synthesized under hydro(solvo)thermal conditions. The L ligand in 1–6 reveals various coordination modes and forms diverse secondary building units (SBUs) in the final structures. Complex 1 shows a 2D layered structure with a rare (3,8)-connected topology based on tetranuclear [Cu4(COO)6(H2O)2(OH)2N6] SBUs. 2 and 3 are isostructural and display 2D 4-connected sql nets with a point symbol of (44·62). 4 and 5 have similar spatial 3D porous frameworks, which can be simplified as a (3,6)-connected 2-nodal net via dinuclear [Co2(COO)2(O)2(NO3)(N)4] SBUs and [Cu2(COO)2(O)(N)4] SBUs, respectively. 6 is a 3D porous framework constructed by dinuclear [Co2(COO)4(H2O)(N)4] motifs with a uninodal 4-connected qtz net. The magnetic properties and gas sorption behaviour of these complexes were investigated carefully, showing that 3 exhibits ferrimagnetic character and 4 demonstrates its effective storage capacity for CO2 as well as high selectivity for CO2 over CH4 under ambient conditions.

Graphical abstract: The influence of coordination modes and active sites of a 5-(triazol-1-yl) nicotinic ligand on the assembly of diverse MOFs

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Publication details

The article was received on 26 Apr 2017, accepted on 22 Jun 2017 and first published on 10 Jul 2017


Article type: Paper
DOI: 10.1039/C7DT01523B
Citation: Dalton Trans., 2017, Advance Article
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    The influence of coordination modes and active sites of a 5-(triazol-1-yl) nicotinic ligand on the assembly of diverse MOFs

    Y. Yan, S. Zhang, G. Yang, W. Zhang, F. Zhang, F. Cao, R. Yang and Y. Wang, Dalton Trans., 2017, Advance Article , DOI: 10.1039/C7DT01523B

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