Nanoporous crystal 12CaO.7Al2O3: a playground for studies of ultraviolet optical absorption of negative ions.
Nanoporous crystal 12CaO.7Al2O3: a playground for studies of ultraviolet optical absorption of negative ions.
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DOI：
10.1021/jp065793b
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发表时间：
2007-03
期刊：
影响因子：
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通讯作者：
K. Hayashi;P. Sushko;D. M. Ramo;A. Shluger;S. Watauchi;I. Tanaka;S. Matsuishi;M. Hirano;H. Hosono
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文献类型：
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作者：
K. Hayashi;P. Sushko;D. M. Ramo;A. Shluger;S. Watauchi;I. Tanaka;S. Matsuishi;M. Hirano;H. Hosono
一种新型的纳米孔材料12Ca0.7Al_2O_3(C12A7)提供了在其纳米孔内掺入大浓度(>；1021 cm-3)广泛的骨架外阴离子的可能性。我们从实验和理论上研究了F-、OH-、O-、O2-、O2-和O22-等几种阴离子的光学吸收，并给出了它们的光学吸收带。结果表明，通过对生长的C12A7进行适当的处理，可以控制骨架外阴离子的化学一致性和浓度。我们还表明，吸附边的位置反过来又由骨架外物种的化学一致性决定，并且可以在大约4-6 eV的范围内变化。我们认为C12A7是一种独特的宿主材料，可以作为研究负电荷物种在其他环境中不稳定的游乐场。
A novel nanoporous material 12CaO.7Al2O3 (C12A7) offers a possibility of incorporating large concentrations (>1021 cm-3) of a wide range of extraframework anions inside its nanopores. We have investigated, both experimentally and theoretically, optical absorption associated with several types of such anions, including F-, OH-, O-, O2-, O2-, and O22-, and assigned their optical absorption bands. It is demonstrated that the chemical identity and concentration of extraframework anions can be controlled by an appropriate treatment of "as grown" C12A7. We also show that the position of the adsorption edge is, in turn, determined by the chemical identity of the extraframework species and can be varied in the range of approximately 4-6 eV. We suggest that C12A7 is a unique host material, which can be used as a playground for studying negatively charged species that are unstable in other environments.