Coordination Polymers Containing 1D Channels as Selective Luminescent Probes

Two 3d−4f heterometallic coordination polymers {[Ln(PDA)3Mn1.5(H2O)3]·3.25H2O}∞ with 1D channels were synthesized under hydrothermal conditions (PDA = pyridine-2,6-dicarboxylic acid; Ln = Eu (1); Ln = Tb (2)). The emission intensities of 1 and 2 increased significantly upon addition of Zn2+, while the introduction of other metal ions caused the intensity to be either unchanged or weakened. The case implies that 1 and 2 may be used as luminescent probes of Zn2+.本研究通过水热条件合成了两种具有一维孔道的3d-4f异金属配位聚合物{[Ln(PDA)₃Mn₁.₅(H₂O)₃]·3.25H₂O}_∞，其中PDA（pyridine-2,6-dicarboxylic acid，吡啶-2,6-二羧酸），Ln分别对应Eu（化合物1）与Tb（化合物2）。当加入Zn²+时，化合物1与2的发射强度均显著提升；而引入其他金属离子时，其发射强度要么保持不变，要么出现减弱。该研究结果表明，化合物1与2可作为Zn²+的发光探针(luminescent probes)。