Synthesis and characterization of two one-dimensional lanthanide coordination polymers
摘要:
Two lanthanide coordination polymers [Eu(H(2)sal)(Hsal)(sal).H2O](n) (1) and {[Tb(FUR)(3)(H2O)(2)].DMF}(n) (2) (H(2)sa1, salicylic acid; Hsal(-), o-HOC6H4CO2-; HFUR, alpha-furancarboxylic acid; DMF, N,N-dimethylformamide) were synthesized and characterized by elemental analysis, TG, IR, and luminescence spectra. The crystal structures were determined by X-ray single crystal analysis. Both complexes are one-dimensional polymers. Probably the luminescence quenching of complex 1 is assigned to its special one-dimensional ribbon structure. The vibration energy level caused by the one-dimensional ribbon and located between D-5(0) and F-7(j) maybe is the main reason. Complex 2 displays intense green luminescence under the excitation of UV light. The emission bands at 486, 541, 584, and 618 nm are attributed to the characteristic D-5(4) --> F-7(j) (j = 6, 5, 4, 3) transitions of Tb(III) ions, respectively. (C) 2004 Elsevier B.V All rights reserved.
Synthesis and characterization of two one-dimensional lanthanide coordination polymers
摘要:
Two lanthanide coordination polymers [Eu(H(2)sal)(Hsal)(sal).H2O](n) (1) and {[Tb(FUR)(3)(H2O)(2)].DMF}(n) (2) (H(2)sa1, salicylic acid; Hsal(-), o-HOC6H4CO2-; HFUR, alpha-furancarboxylic acid; DMF, N,N-dimethylformamide) were synthesized and characterized by elemental analysis, TG, IR, and luminescence spectra. The crystal structures were determined by X-ray single crystal analysis. Both complexes are one-dimensional polymers. Probably the luminescence quenching of complex 1 is assigned to its special one-dimensional ribbon structure. The vibration energy level caused by the one-dimensional ribbon and located between D-5(0) and F-7(j) maybe is the main reason. Complex 2 displays intense green luminescence under the excitation of UV light. The emission bands at 486, 541, 584, and 618 nm are attributed to the characteristic D-5(4) --> F-7(j) (j = 6, 5, 4, 3) transitions of Tb(III) ions, respectively. (C) 2004 Elsevier B.V All rights reserved.