Luminescence (M=Mn²⁺, Cu²⁺) and ESR (M=Gd³⁺, Mn²⁺, Cu²⁺) of Na₂ZnP₂O₇: M

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• 作者：B. Vijaya Kumar ; M. Vithal ; ^{mugavithal@gmail.com}
• 关键词：Microwave ; Metathesis ; ESR ; Luminescence ; Diphosphate
• 刊名：Physica B
• 出版年：2012
• 期刊代码：53_09214526
• 类别：ph
• 出版时间：15 June, 2012
• 卷：407
• 期：12
• 页码：2094-2099
• 文件大小：813 K

摘要

We report the synthesis of sodium zinc diphosphate (Na₂ZnP₂O₇) using a domestic microwave oven (2.45 GHz) and metal ion doped sodium zinc diphosphate (Na_1.88Gd_0.04ZnP₂O₇/Na_1.92M_0.04ZnP₂O₇ (M=Mn and Cu)) by a solid state metathesis reaction. All the materials were characterized by powder X-ray diffraction (XRD) and infrared spectroscopy (IR). These metal doped diphosphates were crystallized in a tetragonal lattice with space group . The IR spectra of all the samples were characterized by bands due to the group. The powder electron spin resonance (ESR) spectrum of Na_1.88Gd_0.04ZnP₂O₇ gave a characteristic 鈥淯鈥?type spectrum. The powder ESR spectrum of Na_1.92Mn_0.04ZnP₂O₇ consists of six lines while Na_1.92Cu_0.04ZnP₂O₇ gave a broad profile. All the doped metal ions occupy the Na⁺ site in the diphosphate lattice. The broad emission band at 614 nm (red band) observed for Na_1.92Mn_0.04ZnP₂O₇ is assigned to an electronic transition of Mn²⁺ in distorted octahedral coordination.