当前位置：
X-MOL 学术
›
Chem. Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Incommensurately Modulated Structures and Luminescence Properties of the AgxSm(2–x)/3WO4 (x = 0.286, 0.2) Scheelites as Thermographic Phosphors
Chemistry of Materials ( IF 7.2 ) Pub Date : 2018-06-21 00:00:00 , DOI: 10.1021/acs.chemmater.8b02029 Vladimir Morozov , Dina Deyneko , Olga Basovich 1 , Elena G. Khaikina 1, 2 , Dmitry Spassky , Anatolii Morozov , Vladimir Chernyshev 3 , Artem Abakumov 4 , Joke Hadermann 5
Chemistry of Materials ( IF 7.2 ) Pub Date : 2018-06-21 00:00:00 , DOI: 10.1021/acs.chemmater.8b02029 Vladimir Morozov , Dina Deyneko , Olga Basovich 1 , Elena G. Khaikina 1, 2 , Dmitry Spassky , Anatolii Morozov , Vladimir Chernyshev 3 , Artem Abakumov 4 , Joke Hadermann 5
Affiliation
|
Ag+ for Sm3+ substitution in the scheelite-type AgxSm(2–x)/3□(1–2x)/3WO4 tungstates has been investigated for its influence on the cation-vacancy ordering and luminescence properties. A solid state method was used to synthesize the x = 0.286 and x = 0.2 compounds, which exhibited (3 + 1)D incommensurately modulated structures in the transmission electron microscopy study. Their structures were refined using high resolution synchrotron powder X-ray diffraction data. Under near-ultraviolet light, both compounds show the characteristic emission lines for 4G5/2 → 6HJ (J = 5/2, 7/2, 9/2, and 11/2) transitions of the Sm3+ ions in the range 550–720 nm, with the J = 9/2 transition at the ∼648 nm region being dominant for all photoluminescence spectra. The intensities of the 4G5/2 → 6H9/2 and 4G5/2 → 6H7/2 bands have different temperature dependencies. The emission intensity ratios (R) for these bands vary reproducibly with temperature, allowing the use of these materials as thermographic phosphors.
中文翻译：
Ag x Sm （2- x）/ 3 WO 4（x = 0.286，0.2）白钨矿作为热成像荧光体的非同等调制结构和发光特性
研究了在白钨矿型Ag x Sm （2- x）/ 3 □ （1-2 x）/ 3 WO 4钨酸盐中用Ag +替代Sm 3+对阳离子空位有序性和发光性能的影响。使用固态方法合成了x = 0.286和x = 0.2的化合物，这些化合物在透射电子显微镜研究中表现出（3 +1）D不等比例调制的结构。使用高分辨率同步加速器粉末X射线衍射数据完善了它们的结构。在近紫外光下，这两种化合物均显示出4 G的特征发射线Sm 3+离子在550–720 nm范围内的5/2 → 6 H J（J = 5 / 2、7 / 2、9 / 2和11/2）跃迁，其中J = 9/2跃迁在〜648 nm的区域对所有光致发光光谱都是主要的。4 G 5/2 → 6 H 9/2和4 G 5/2 → 6 H 7/2的强度具有不同的温度依赖性。这些波段的发射强度比（R）可随温度变化而变化，从而允许将这些材料用作热成像荧光粉。
更新日期：2018-06-21
中文翻译：
Ag x Sm （2- x）/ 3 WO 4（x = 0.286，0.2）白钨矿作为热成像荧光体的非同等调制结构和发光特性
研究了在白钨矿型Ag x Sm （2- x）/ 3 □ （1-2 x）/ 3 WO 4钨酸盐中用Ag +替代Sm 3+对阳离子空位有序性和发光性能的影响。使用固态方法合成了x = 0.286和x = 0.2的化合物，这些化合物在透射电子显微镜研究中表现出（3 +1）D不等比例调制的结构。使用高分辨率同步加速器粉末X射线衍射数据完善了它们的结构。在近紫外光下，这两种化合物均显示出4 G的特征发射线Sm 3+离子在550–720 nm范围内的5/2 → 6 H J（J = 5 / 2、7 / 2、9 / 2和11/2）跃迁，其中J = 9/2跃迁在〜648 nm的区域对所有光致发光光谱都是主要的。4 G 5/2 → 6 H 9/2和4 G 5/2 → 6 H 7/2的强度具有不同的温度依赖性。这些波段的发射强度比（R）可随温度变化而变化，从而允许将这些材料用作热成像荧光粉。
京公网安备 11010802027423号