Multi-Color Luminescence and Sensing of Rare Earth Hybrids by Ionic Exchange Modification

Luminescent rare earth coordination polymers [H2NMe2]3[Y(DPA)3] ([H2NMe2](+) = dimethyl amino cation; H2DPA = 2,6-dipicolinic acid) are synthesized and is further modified by the ionic exchange reaction of [H2NMe2](+) cation with rare earth ions, which is named as RE(3+) ⊂ [Y(DPA)3] (RE = Eu, Tb, Sm, Dy) hybrid systems. The multi-color can be tuned for these functionalized hybrid systems and even white color luminescence can be integrated for Sm(3+) ⊂ [Y(DPA)3]. Besides, the fluorescent sensing property of Tb(3+) ⊂ [Y(DPA)3] system is checked, which shows high selectivity towards Cr(3+) with the concentration of 10(-5) mol⋅L(-1).