Multifunctional polymers with interpenetrating structures: luminescence sensing, ECL behaviors, selective detection of Fe3+ ion and rapid removal of anionic dyes

Three novel 3D coordination polymers (CPs), {[Cd(L)(bimb)](H2O)(4)}(n) (1), {[Zn(L)(bibp)](H2O)(DMF)}(n) (2) and {[Zn(L)(bif)](H2O)(4)}(n) (3) (bimb = 1,4-bis(imidazoly-1-yl)benzene, bibp = 4,4 '-bis(imidazol-1-yl)biphenyl, bif = 2,7-bis(1-imidazoly)fluorene, H2L = 1-(4-carboxylphenyl)piperidine-4-caboxylic acid) have been synthesized under solvothermal conditions. Compound 1 featured a 5-fold interpenetration of the 4-c dia net. Compound 2 and 3 presented a 6-fold interpenetration of the 4-c dia net. Moreover, their luminescence properties and the selective detection of Fe3+ ion for 1 were investigated. In addition, the adsorption ability of 1 and 2 toward dye molecules was tested, respectively. Furthermore, their ECL behaviors were tested.