1,3-金刚烷二乙酸配体构筑的两个镉配合物的合成、表征及晶体结构(英文)

Syntheses, Characterizations and Crystal Structures of Two Cadmium(Ⅱ) Coordination Polymers Constructed by 1,3-Adamantanediacetic Acid

合成了2个一维Cd(Ⅱ)配合物[CdL(2,2′-bipy)]n·nH2O(1)和[CdL(2,2′-bipy)(H2O)]n·4nH2O(2)(H2L为1,3金刚烷二乙酸),并经X-射线单晶衍射方法测定了它们的晶体结构。在配合物1中,中心金属Cd(Ⅱ)为七配位的单帽三棱柱结构,而在配合物2中,Cd(Ⅱ)为七配位的五角双锥结构。1,3金刚烷二乙酸根作为桥联配体连接中心金属Cd(Ⅱ)离子形成一维链,同时通过氢键和π-π堆积作用形成三维超分子结构。研究了配合物1的荧光光谱。

Two new one-dimensional coordination polymers,[CdL（2,2′-hipy）]n·nH2O（1）and[CdL（2,2′-bipy）（H2O）]n·4nH2O（2）（H2L=l,3-adamantanediacetic acid, 2,2′-bipy=2,2′-bipyridine）, have been synthesized and characterized by single-crystal X-ray diffraction. Complex 1 belongs to triclinie system, space group P^-1 with a=1.0372（1）nm, b=1.0432（1） nm, c=1.0907（1） nm, α=90.616（4）°, β=92.526（4）°, γ=108.756（4）°, V=1.1160（1） nm^3, Z=2, Mr=536.88, F（000）=548, Dc=1.598 g·cm^-3,μ=1.017 mm^-1, the final R=0.0220 and ωR=0.0549 for 4834 observed reflections （I〉2σ（I））. Complex 2 belongs to monoclinic system, space group P21/n with a=1.3663（1） nm, b=1.4132（1） nm, c= 1.5102（1） nm,β= 114.611（2）°, V=2.6511（1） nm^3, Z=4, Mr=608.95, F（000）=1256, De= 1.526g·cm^-3, μ=0.877mm^-1, the final R=0.0301 and ωR =0.0712 for 4592 observed reflections（I〉2σ（I））. The cadmium ion is seven-coordinated in a distorted monocapped triangular prismatic arrangement for 1 and in a distorted pentagonal-bipyramidal arrangement for 2, and 1,3-adamantanediacetie acids act as the bridge to link the cadmiums to ID chains. Non-covalent interactions, such as hydrogen-bonding and aromatic π-π interactions, lead the complexes to supramoleeular architectures. The luminescent property for 1 has also been studied.