A series of Ln-MOFs with π-conjugated and uncoordinated lewis basic triazolyl ligand have luminescence modulation, near white light emission, selective luminescence sensing, and anticounterfeiting.

Five new 3D MOFs were constructed which 1(Zn) exhibits high luminescence sensing for Fe3+ ions, and 5(Cu) displays antiferromagnetic exchange phenomenons.

New Ln-MOFs were yielded by a flexible ligand and lanthanide ions. The colors can be regulated by adjusting the molar ratios of Eu3+/Tb3+, showing promising applications in NB sensing, tunable photoluminescence and pH sensing.