一个新型层状硒酸钒无机-有机杂化材料的水热合成、结构表征及荧光性质

Hydrothermal Synthesis,Structure Characterization and Fluorescence Property of a New Layered Vanadium Selenite

用水热法合成一个层状无机-有机杂化硒钒酸盐,并通过元素分析、红外光谱和X射线单晶衍射测试技术对其结构进行表征.结果表明:该化合物属于三斜晶系,P1空间群,a=0.84293(2)nm,b=0.92867(3)nm,c=0.97095(2)nm,α=97.037(2)°,β=110.806(2)°,γ=98.385(2)°,V=0.6903(3)nm3,Z=2,R1=0.0225,wR2=0.0693;该化合物具有层状结构,由{V6Se2O25}八元环、{V4Se2O19}六元环和{V2Se2O13}四元环交替排列构成,并通过2,2′-联吡啶分子面与面之间的π-π作用形成三维超分子结构.荧光光谱分析结果表明,该化合物室温下显示出较强的蓝色荧光性质.

A new layered vanadium selenite （2,2′-bipy）（H2O）V2SeO7 was prepared under hydrothermal conditions,and characterized by elemental analysis,IR and single crystal X-ray diffraction analysis.The compound crystallized in a triclinic system,P1 space group,a=0.842 93（2） nm,b=0.928 67（3） nm,c=0.970 95（2） nm,α=97.037（2）°,β=110.806（2）°,γ=98.385 （2）°,V=0.690 3（3） nm3,Z=2,R1=0.022 5,wR2=0.069 3. The compound,（2,2′-bipy）（H2O）V2SeO7,has a layered structure constructed from eight membered rings {V6Se2O25},six membered rings {V4Se2O19},four membered rings {V2Se2O13} that were arranged alternately,and then extended into three dimensional supramolecular array through π-π stacking contacts of 2,2′-bipyridine molecules. The fluorescence spectrum shows that the title compound exhibits blue emission in the solid state at room temperature.