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首页> 外文期刊>Journal of chemical crystallography >Synthesis, Crystal Structure, and Spectrum Properties of a New Quaternary Borate NaSr7AlB18O36 with the Cyclic B18O3618- Group, Notation of 6 x (3[2 Delta+1T])
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Synthesis, Crystal Structure, and Spectrum Properties of a New Quaternary Borate NaSr7AlB18O36 with the Cyclic B18O3618- Group, Notation of 6 x (3[2 Delta+1T])

机译：具有环状B18O3618-基，记号为6 x（3 [2 Delta + 1T]）的新型四元硼酸盐NaSr7AlB18O36的合成，晶体结构和光谱性质

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摘要

A new sodium strontium aluminoborate, NaSr7AlB18O36, has been synthesized by high-temperature solution reaction at 860 degrees C. Its crystal structure was established by single-crystal X-ray diffraction technique: the space group R (3) over barc (No. 167), cell parameters a = 11.356(2) angstrom, c = 36.655(7) angstrom, V = 4093.7(12) angstrom(3), and Z = 6. It is isostructural with Sr8MgB18O36 and the crystal structure consists of the cyclic B18O3618- building unit of corner-sharing twelve BO3 triangles and six BO4 tetrahedra. Each B18O3618- group is bonded to six octahedrally coordinated Al3+ centers via Al-O bonds to generate a 3D (3)(infinity)[Al(B18O36)](15-) framework that has intersecting open channels occupied by Sr2+/Na+ cations. The IR spectrum has further confirmed that the compound contains low symmetric BO3 and BO4 groups; UV-Vis diffuse reflectance spectrum revealed an optical band gap of about 3.65 eV; while solid-state fluorescence spectrum exhibited a broad emission band with the emitted main peak localized at about 533.3 nm and shoulder at 420 nm upon excitation by laser of 325 nm.
机译：通过在860摄氏度下的高温溶液反应合成了一种新的铝硼酸锶钠NaSr7AlB18O36。它的晶体结构是通过单晶X射线衍射技术建立的：在barc上的空间群R（3）（No. 167） ），晶胞参数a = 11.356（2）埃，c = 36.655（7）埃，V = 4093.7（12）埃（3），Z = 6.它与Sr8MgB18O36是同构的，晶体结构由环状B18O3618组成-角落共享十二个BO3三角形和六个BO4四面体的建筑单位。每个B18O3618-基团通过Al-O键与六个八面体配位的Al3 +中心键合，生成3D（3）（无限）[Al（B18O36）]（15-）骨架，该骨架具有Sr2 + / Na +阳离子所占据的相交开放通道。红外光谱进一步证实了该化合物含有低对称的BO3和BO4基团。 UV-Vis漫反射光谱显示出约3.65 eV的光学带隙;固态荧光光谱显示出较宽的发射带，在325 nm激光激发下，发射的主峰位于约533.3 nm处，肩峰位于420 nm处。

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