Microwave synthesis of 1-D, 2-D, and 3-D blue luminescent coordination polymers of d10 metals with a new rigid tris-triazole ligand

Publication date: Available online 18 May 2019Source: Inorganica Chimica ActaAuthor(s): Sheng-Chun Chen, Nan-Nan Chai, Kun-Lin Huang, Feng Tian, Juan Shi, Ming-Yang He, Qun ChenAbstractThe microwave heating hydrothermal and solvothermal reactions (120 °C, 20 min) of a new rigid tris-triazole ligand, 2-fluoro-3,5,6-tri(1H-1,2,4-triazol-1-yl)-1,4-benzenedicarbonitrile, with Zn(II), Cd(II) and Pb(II) metal salts afforded four crystalline coordination polymers (CPs), namely, {[Zn(L)2(H2O)2]·2H2O}n (1), {[Cd(L)2(H2O)2]·2H2O}n (2), {[Cd(L)(NO3)(DMF)]·0.5DMF·0.25CH3CN}n (3) and {[Pb(L)2(H2O)2]·H2O}n (4), respectively, where the starting ligand undergoes in situ hydrolysis to form a new ligand 2-oxidanyl-3,5,6-tri(1H-1,2,4-triazol-1-yl)terephthalonitrile (HL). Their structures have been determined by single-crystal X-ray diffraction analyses and further characterized by elemental analysis, IR spectroscopy, powder X-ray diffraction, and thermogravimetric (TG) analyses. Both complexes 1 and 2 are isostructural, featuring 1-D looped-chain structures. Complex 3 displays a 2-D 44-sql layer structure, while complex 4 presents a 3,6-connected 3-D framework with an anatase topology. The remarkable structural diversity of complexes 1–4 may illustrate the powerful effect of metal ions and solvent systems in coordination assemblies. Furthermore, since HL is a rigid ligand with the large conjugated π-system, all these complexes exhibit strong blue luminescence emissions in the solid sta...

Source: Inorganica Chimica Acta - May 19, 2019 Category: Chemistry Source Type: research