Two novel Cd(Ⅱ) coordination polymers, [Cd 2(C 10H 2O 8)\5(H 2O) 6] n (1) and [Cd 4(C 6H 4O 2N) 8(H 2O) 4] n (2) (C 10H 2O 8=1,2,4,5-benzenetetracarboxyl and C 6H 4O 2N=nicotinato), were hydrothermally synthesized an...Two novel Cd(Ⅱ) coordination polymers, [Cd 2(C 10H 2O 8)\5(H 2O) 6] n (1) and [Cd 4(C 6H 4O 2N) 8(H 2O) 4] n (2) (C 10H 2O 8=1,2,4,5-benzenetetracarboxyl and C 6H 4O 2N=nicotinato), were hydrothermally synthesized and characterized by X-ray diffraction of the single-crystal and fluorescence spectra. Complex 1 crystallizes in triclinic system, space group P1 with a=0.559 62(7) nm, b=0.777 58(6) nm, c=0.969 75(10) nm, α=111.981(5)°, β=101.649(6)°, γ=98.240(5)°, and Z=1. Final R=0.024 8(wR=0.078 5). Complex 2 belongs to orthorhombic system, space group Pbca with unit cell dimensions a=1.144 94(19) nm, b=1.209 69(6) nm, c=1.740 73(8) nm and Z=8. Final R=0.018 5(wR=0.034 8). Both the two complexes are coordination polymers with a two-dimensional infinite structure, the repeat unit is [Cd 2(C 10H 2O 8)(H 2O) 6] (1) and [Cd 4(C 6H 4O 2N) 8(H 2O) 4] (2) which are bridged by the ligands of 1,2,4,5-benzenetetracarboxyl(C 10H 2O 8) and nicotinato(NA), respectively. The two polymers show strong fluorescence with λ em=433 nm(λ ex=333 nm, 1) and λ em=423 nm(λ ex=330 nm, 2) in the solid state at room temperature. The emissions observed in the polymers are tentatively assigned to the ligands fluorescence(LLCT).展开更多
基金financially supported by the National Natural Science Foundation of China(Grant No.21671124)the young project of Taiyuan University(Grant No.21TYKQ20)。
文摘Two novel Cd(Ⅱ) coordination polymers, [Cd 2(C 10H 2O 8)\5(H 2O) 6] n (1) and [Cd 4(C 6H 4O 2N) 8(H 2O) 4] n (2) (C 10H 2O 8=1,2,4,5-benzenetetracarboxyl and C 6H 4O 2N=nicotinato), were hydrothermally synthesized and characterized by X-ray diffraction of the single-crystal and fluorescence spectra. Complex 1 crystallizes in triclinic system, space group P1 with a=0.559 62(7) nm, b=0.777 58(6) nm, c=0.969 75(10) nm, α=111.981(5)°, β=101.649(6)°, γ=98.240(5)°, and Z=1. Final R=0.024 8(wR=0.078 5). Complex 2 belongs to orthorhombic system, space group Pbca with unit cell dimensions a=1.144 94(19) nm, b=1.209 69(6) nm, c=1.740 73(8) nm and Z=8. Final R=0.018 5(wR=0.034 8). Both the two complexes are coordination polymers with a two-dimensional infinite structure, the repeat unit is [Cd 2(C 10H 2O 8)(H 2O) 6] (1) and [Cd 4(C 6H 4O 2N) 8(H 2O) 4] (2) which are bridged by the ligands of 1,2,4,5-benzenetetracarboxyl(C 10H 2O 8) and nicotinato(NA), respectively. The two polymers show strong fluorescence with λ em=433 nm(λ ex=333 nm, 1) and λ em=423 nm(λ ex=330 nm, 2) in the solid state at room temperature. The emissions observed in the polymers are tentatively assigned to the ligands fluorescence(LLCT).
