Studies on preparation, crystal structure, thermal properties and fluorescence properties of rare earth complexes composed of 2-chloro-4-fluorobenzoic acid and 2,2':6′,2″-terpyridine

Four new 2D complexes namely [Ln(2-Cl-4-FBA)3(terpy)H2O] (Ln=Er(1),Ho(2)); [Eu(2-Cl-4-FBA)3(terpy)H2O]·1.5H2O(3); [Tb(2-Cl-4-FBA)3(terpy)H2O]·2H2O (4); (2-Cl-4-FBA=2-chloro-4-fluorobenzoate,terpy=2,2':6′,2 ″-terpyridine) were synthesized at normal temperature. The structures of complexes were determined by single-crystal X-ray diffraction. The results show that the two complexes 1-2 are isomorphous and complexes 3-4 are isostructural. Four...