Based on a flexible ether-oxygen tricarboxylate ligand, H₃L = 3,5-bis[(3-carboxylphenyl)oxy]benzoic acid, one novel 2-D La-CP with the formula of {[La(L)(H₂O)₃]·H₂O}_n has been solventhermally synthesized. The 2-D bilayer structure of La-CP is constructed by carboxylate-bridged La_n(CO₂)_n layers connected by M-shaped tricarboxylate ligands arranged below and above, respectively. The La-CP exhibits blue luminescence and demonstrates multi-responsive luminescence sensing activities toward Fe³⁺, Cr(VI) and benzothiazoles (BTs) through luminescence quenching. It could be repeated after at least five cycling runs. The fast response, high sensitivity and selectivity makes it a potential multi-functional chemosensor.

Based on a flexible ether-oxygen tricarboxylate ligand, H₃L = 3,5-bis[(3-carboxylphenyl)oxy]benzoic acid, one novel 2-D La-CP with the formula of {[La(L)(H₂O)₃]·H₂O}_n has been solventhermally synthesized. The 2-D bilayer structure of La-CP is constructed by carboxylate-bridged La_n(CO₂)_n layers connected by M-shaped tricarboxylate ligands arranged below and above, respectively. The La-CP exhibits blue luminescence and demonstrates multi-responsive luminescence sensing activities toward Fe³⁺，Cr（VI）和苯并噻唑（BTs）通过发光淬灭。至少进行5次循环后，可以重复进行一次。快速响应，高灵敏度和选择性使其成为潜在的多功能化学传感器。