Two high coordination crystals were obtained by the interaction of Ce^（3＋） and Nd^（3＋） with polypyridyl quinoxaline ligand 2,3,6,7,10,11-hexakis（2-pyridyl）dipyrazino[2,3-f：20,30-h]quinoxaline（HPDQ）, and the...Two high coordination crystals were obtained by the interaction of Ce^（3＋） and Nd^（3＋） with polypyridyl quinoxaline ligand 2,3,6,7,10,11-hexakis（2-pyridyl）dipyrazino[2,3-f：20,30-h]quinoxaline（HPDQ）, and they were characterized. Complex 1 exhibits a 0 dimensional three-nuclear structure, with the three Ce（Ⅲ） atoms being ten-, eleven- and twelve-coordinated. Complex 2 is a 0 dimensional dual-core structure and the Nd（Ⅲ） atom is ten-coordinated. Complex 1 is of monoclinic system, space group P2/c with a = 16.850（3）, b = 16.617（3）, c = 24.017（5） ？, β = 100.94（3）o, V = 6602（2） ？~3, Z = 4, S = 1.062, F（000） = 3372, R = 0.0504 and wR = 0.1463（I 〉 2σ（I））. Complex 2 adopts a monoclinic system, space group C2/c with a = 25.795（5）, b = 20.166（4）, c = 13.059（3） ？, β = 112.29（3）°, V = 6286（2） ？~3, Z = 4, S = 1.004, F（000） = 2664, R = 0.0663 and wR = 0.1821（I 〉 2σ（I））. Furthermore, the behaviors of HPDQ with Ce^（3＋） and Nd^（3＋） in the solution are also investigated. After the Ce^（3＋） is added, the ultraviolet absorption of the solution is enhanced with a red shift compared with that of the HPDQ ligand. While after adding Nd^（3＋）, the ultraviolet absorption of the solution is weakened, and it has a red shift which is the same as Ce^（3＋）. However, after the respective addition of metal ions, the emission of all solutions is quenched and has a red shift compared with that of the HPDQ ligand.展开更多
基金supported by the NNSFC(21301100)the Education Department Fund of Henan(13A150819)Special fund of Nanyang Normal University(ZX2013029)
文摘Two high coordination crystals were obtained by the interaction of Ce^（3＋） and Nd^（3＋） with polypyridyl quinoxaline ligand 2,3,6,7,10,11-hexakis（2-pyridyl）dipyrazino[2,3-f：20,30-h]quinoxaline（HPDQ）, and they were characterized. Complex 1 exhibits a 0 dimensional three-nuclear structure, with the three Ce（Ⅲ） atoms being ten-, eleven- and twelve-coordinated. Complex 2 is a 0 dimensional dual-core structure and the Nd（Ⅲ） atom is ten-coordinated. Complex 1 is of monoclinic system, space group P2/c with a = 16.850（3）, b = 16.617（3）, c = 24.017（5） ？, β = 100.94（3）o, V = 6602（2） ？~3, Z = 4, S = 1.062, F（000） = 3372, R = 0.0504 and wR = 0.1463（I 〉 2σ（I））. Complex 2 adopts a monoclinic system, space group C2/c with a = 25.795（5）, b = 20.166（4）, c = 13.059（3） ？, β = 112.29（3）°, V = 6286（2） ？~3, Z = 4, S = 1.004, F（000） = 2664, R = 0.0663 and wR = 0.1821（I 〉 2σ（I））. Furthermore, the behaviors of HPDQ with Ce^（3＋） and Nd^（3＋） in the solution are also investigated. After the Ce^（3＋） is added, the ultraviolet absorption of the solution is enhanced with a red shift compared with that of the HPDQ ligand. While after adding Nd^（3＋）, the ultraviolet absorption of the solution is weakened, and it has a red shift which is the same as Ce^（3＋）. However, after the respective addition of metal ions, the emission of all solutions is quenched and has a red shift compared with that of the HPDQ ligand.
