| 摘 要： | 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)dipyrazino2,3-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.
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