A novel porous metalâorganic framework, [Zn2(L)·H2O]·3H2O·3DMAc·NH2(CH3)2}n (Zn(II)âMOF), was synthesized under solvothermal conditions using a flexible multicarboxylic acid (H5L = 3,5-bis(1-methoxy-3,5-benzene dicarboxylic acid)benzoic acid). Zn(II)âMOF contains 1D nanotubular channels of 13.8 à à 16.4 à and exhibits a rare 5-connected vbk net with a Schläfli symbol of 45.65} topology. Notably, Zn(II)âMOF can adsorb toluidine blue fast and effectively, and trap lanthanide ions such as Eu3+ and Tb3+ to sensitize their emissions in the solid state through a Ln3+-exchanged approach. Furthermore, we successfully obtained white light emitting materials.