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Luminescence Properties of (Y, Gd)Al_3(BO_3)_4∶Eu ^(3+) under VUV excitation

Journal of Rare Earths 2004年第1期22卷 133-136页

作者：刘端阳何大伟康凯李春棠李少霞 Ministry of Education Key Laboratory of Materials for Information Storage and Display

Y, Gd)Al 3(BO 3) 4∶Eu 3+ samples were prepared by the conventional solid state reaction. The XRD results indicate that the crystal symmetry is low. The excitation spectrum is composed of two broad bands centered at about 170 and 250 nm respectively. In the emission spectra, the peak wavelength is about 616 nm under 147 nm VUV excitation. The luminescent chromaticity coordinate and the relative intensity change along with Gd 3+ mole concentration in the range of 0.15 to 0.85 mol (and Eu 3+ mole concentration, 0.02 to 0.1 mol). The correlative data show that the concentration quenching occurs when the Eu 3+ mole concentration ranges from 0.02 to 0.1 mol, and the Gd 3+→Gd 3+, Gd 3+→Eu 3+ and host→Eu 3+, Gd 3+ energy transfers exist, and Gd 3+ mole concentration influences Eu 3+ emission.

关键词： optics (Y, Gd)Al 3(BO 3) 4∶Eu 3+ chromaticity coordinate VUV concentration quenching rare earths

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Photophysical Performance and Energy Transfer Mechanism of a 1-D Chain-like Complex

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Chinese Journal of Structural Chemistry 2020年第4期39卷 747-755页

作者： LIN Wei-Sheng HUANG Jian-Gen WEN Yun-Xiang LUO Hui CHEN Wen-Tong Department of Ecological and Resources Engineering Fujian Key Laboratory of Eco-industrial Green TechnologyWuyi UniversityWuyishanFujian 354300China Institute of Applied Chemistry School of Chemistry and Chemical EngineeringJiangxi Province Key Laboratory of Coordination ChemistryHumic Acid Utilization Engineering Research Center of Jiangxi ProvinceJinggangshan UniversityJi’anJiangxi 343009China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

By means of solvothermal reactions,a novel lanthanide-mercury compound,{[Ho(IA)3(H3O)2]2n[2n(HgCl4)][n(HgCl5)]}·3nH3O·nH2O(1,HIA=isonicotinc acid)was prepared and structurally characterized by single-crystal X-ray *** 1 crystallizes in the C2/c space group of monoclinic system with a=24.2147(5),b=20.8106(4),c=15.3060(3)Å,β=128.326(2)°,V=6050.8(2)Å3,C36H45Cl13Hg3Ho2N6O20,Mr=2274.26,Z=4,Dc=2.497 g/cm^3,μ(MoKα)=10.817 mm-1 and F(000)=*** exhibits a one-dimensional(1-D)chain-like ***-state photoluminescence measurement shows that it displays brown light emission *** emission bands originate from the characteristic emissions of the 4f electrons intrashell transitions of 5S2→5I8 and 5F5→5I8 of the holmium(Ⅲ)ions in *** photoluminescence emission energy transfer mechanism is elucidated by the energy level diagrams of the holmium(Ⅲ)ions and isonicotinic acid *** 1 has CIE chromaticity coordinates of(0.4361,0.4992).Solid-state UV/Vis diffuse reflectance spectra reveal that it possesses wide optical band gap of 4.94 eV.

关键词： chromaticity coordinate energy transfer isonicotinc acid lanthanide Photoluminescence

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