Coordination Polymers with Bipyridyl Diene and Triene Ligands: Synthesis, Structures and Luminescent Properties

Solvothermal reactions of cadmium salts with bipyridyl diene and triene ligands[(1,3-bis((E)-2-(pyridin-4-yl)vinyl)benzene-(1,3-bpeb) and 1,6-bis(4-pyridyl)-1,3,5-hexatriene(bphte)] and one bipyridyl triene ligand[1,6-bis(4-pyridyl)-1,3,5-hexatriene-(bphte)] in the presence of auxiliary carboxylic acids including 2,6-dichlorobenzoic acid(2,6-HDCBA) and 2-naphthal-enecarboxylic acid(2-HNCA) gave rise to four coordination polymers [Cd(bphte)(2,6-DCBA)(2)](n)(1), {[Cd(bphte)(2-NCA)(2)]center dot 5.8H(2)O}(n)(2), [Cd-2(1,3-bpeb)(2)(2,6-DCBA)(4)](n)(3) and {[Cd-4(1,3-bpeb)(4)(2-NCA)(7)(HCOO)]center dot 2-HNCA center dot H2O}(n)(4), respectively. Compounds 1-4 were structurally characterized by elemental analysis, IR, H-1 NMR, powder X-ray diffraction, thermogravimetric analysis and single-crystal X-ray diffraction. They possess one-dimensional linear(1, 2) and zigzag(3, 4) chain structures. Their luminescent properties were explored while the representative sample 4 exhibited good luminescent performance in sensing Fe(III) in water.

Automated summary

Four coordination polymers were synthesized using different ligands and auxiliary carboxylic acids under solvothermal conditions. These polymers exhibit varied structures and luminescent properties, with one of them showing good performance in sensing Fe(III) in water.