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以4-(1,8-萘二甲酰亚胺基)苯甲酸配体及硝酸钬和硝酸镱为原料,采用水热法合成了Ho(Ⅲ)和Yb(Ⅲ)两种配合物.经单晶X射线衍射分析,两个配合物均属六方晶系,金属离子与羧酸中的氧原子桥连成螺旋链状结构.配合物1的晶胞参数:a=b=1.783 30(17)nm,c=0.942 15(11)nm,α=β=90%,γ=120%;配合物2的晶胞参数:a=b=1.780 39(8)nm,c=0.939 46(8)nm,α=β=90%,γ=120%.晶体的热稳定性研究结果表明:Ho(Ⅲ)和Yb(Ⅲ)配合物晶体分别在589℃和582℃时开始失去配体分子,晶体结构开始坍塌.
Ho (Ⅲ) and Yb (Ⅲ) complexes were synthesized by hydrothermal method using 4- (1,8-naphthalimido) benzoic acid ligand and holmium nitrate and ytterbium nitrate as raw materials. Single crystal X-ray diffraction analysis shows that both of the complexes are hexagonal, and the metal ions and the oxygen atoms in the carboxylic acid bridge into a helical chain structure. The unit cell parameters of complex 1 are: a = b = 1.783 30 (17 ), c = 0.942 15 (11) nm, α = β = 90%, γ = 120%. The unit cell parameters of complex 2 are: a = b = 1.780 39 (8) nm, nm, α = β = 90%, γ = 120%. The results of the thermal stability study show that the crystal of Ho (Ⅲ) and Yb (Ⅲ) complexes begin to lose their ligand molecules at 589 ℃ and 582 ℃ respectively, The structure started to collapse.