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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Observation of Single-Crystal-Type EPR Spectra from Monolayers of Copper-Exchanged Zeolite Na-A Crystals Assembled on Glass Plates
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Observation of Single-Crystal-Type EPR Spectra from Monolayers of Copper-Exchanged Zeolite Na-A Crystals Assembled on Glass Plates

机译：从玻璃板上组装的铜交换沸石Na-A晶体单层观察单晶体EPR光谱

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摘要

Single-crystal-type EPR spectra were observed for microcrystals of copper(II)-exchanged zeolite Na-A assembled on glass plates when the magnetic field was perpendicular to the glass surface. Two copper species (H and D) were identified both in the powder sample and in the assembled crystals. The g_z direction of species H is parallel to [001] of the cubic crystal, while that of species D is tilted 9° away from [001]. Previously, other authors assumed the g_z directions of the two corresponding species to be parallel to [111]. On the basis of the g_z directions, we suggest that Cu~(2+) in species H is displaced 0.149 nm along [111] from the six-ring plane into the β cage and octahedrally coordinated to three zeolite oxygen atoms in the six-ring plane and three water molecules. The g_z direction of Cu~(2+) in species D is not compatible with site II in the six-ring plane. Species D is probably a trigonal complex with Cu~(2+) displaced into the β cage and coordinated to three zeolite oxygen atoms.
机译：当磁场垂直于玻璃表面时，观察到组装在玻璃板上的铜（II）交换沸石Na-A的微晶的单晶型EPR光谱。在粉末样品和组装的晶体中都鉴定出两种铜（H和D）。物质H的g_z方向与立方晶体的[001]平行，而物质D的g_z方向与[001]倾斜9°。以前，其他作者假设两个相应物种的g_z方向与[111]平行。根据g_z方向，我们建议物种H中的Cu〜（2+）沿着[111]从六环平面移入β笼，并八面体配位到六-环中的三个沸石氧原子，位移为0.149 nm。环平面和三个水分子。物种D中Cu〜（2+）的g_z方向与六环平面中的位点II不兼容。物种D可能是Cu〜（2+）移入β笼并与三个沸石氧原子配位的三角形络合物。

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