Effects of High Pressure on the Luminescence Spectra of Eu(SO4)2·NH4 Microcrystals: Anisotropically Induced Structural Distortions

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• 作者：Concepci&oacute ; n Cascales ; Alicia de André ; s ; Javier Sá ; nchez-Benitez
• 刊名：Journal of Physical Chemistry A
• 出版年：2008
• 出版时间：February 21, 2008
• 年：2008
• 卷：112
• 期：7
• 页码：1464 - 1472
• 全文大小：363K
• 年卷期：v.112,no.7(February 21, 2008)
• ISSN：1520-5215

文摘

The possibilities of the use of Eu³⁺ in extracting information of the pressure effects on the nature of itscrystal site in the NH₄·Eu(SO₄)₂ catalytic host are closely inspected through the study of emission spectra forapplied pressures up to 87 kbar. The phenomenological crystal field analysis of these spectra reveals cleardiscontinuities, at ~30 kbar, the sharper ones, and then at ~70 kbar, in crystal field strength trends, whichtaken together with structure-based simulations of crystal field interactions indicate well-defined pressure-induced anisotropic distortions in Eu³⁺ local environments.