二咪唑基甲烷配体构筑Ag(Ⅰ)配位聚合物的合成与晶体结构

Synthesis and crystal structure of a novel silver(Ⅰ) coordination polymer from Bis(imidazol-1-yl)-methane

通过溶液扩散合成了一个新颖的基于二咪唑基甲烷配体(BIM)构筑的Ag(Ⅰ)配位聚合物[Ag(BIM)ClO4]n,对其进行了元素分析,红外光谱与热重分析表征,并用单晶X射线衍射测定了晶体结构。该配合物属于单斜晶系,空间群为P2(1)/c,晶胞参数为a=4.8952(4),b=14.1094(13),c=15.5731(14),α=90°,β=90.458(2)°,γ=90°,V=1075.57(16)3,Z=4,Dc=2.195 mg/m3,μ=2.132mm-1,F(000)=696,最终R=0.0302,wR=0.0762用于1814个可观测点。晶体结构表明Ag(Ⅰ)离子同二咪唑基甲烷配体以直线型二齿方式配位形成一维"之"字链的阳离子结构,并通过金属-π键作用和阴离子的桥联作用形成三维的金属有机网格,该化合物十分稳定,热力学分解温度为352℃.

A novel silver （Ⅰ） coordination polymer [ Ag（BIM） ClO4 ] n （ BIM = his（ imidazol - 1 - yl） - methane） has been synthesized and characterized in the solid state by X - ray diffraction. It crystallizes in a monoclinic space group P2 （ 1 ）/c, witha a=4.8952（4）,b=14.1094（13）,c=15.5731（14）,α=90°,β=90.458（2）°,γ=90°,V=1075.57（16）3,Z=4,Dc=2.195 mg/m3,μ=2.132mm-1,F（000）=696, the final R =0. 0302 and wR =0. 0762 for 1814 observed reflections with Ⅰ〉 20-（Ⅰ）. It contains one -dimensional zig- zag cationic chains formed through BIM and AgI. And the three - dimensional frameworks were formed by metal - 7r interactions and bridged perehlorate anions. TGA measure- ment suggests that it is thermal stability with the decomposition temperature at 352℃.