6192-13-8Relevant articles and documents
Anhydrous neodymium(III) acetate
Torres, Sonia Gomez,Meyer, Gerd
, p. 231 - 233 (2008)
Anhydrous neodymium(III) acetate, Nd(OAc)3 was obtained as light purple single crystals by direct oxidation of neodymium metal with malonic acid in a glass ampoule at 180 °C. It crystallizes with the monoclinic space group P21/a (no. 14) with a = 2201.7(2), b = 1850.0(1), c = 2419.0(3) pm, β = 96.127(8)°, V = 9796.8(1) · 106 · pm3, Z = 40 [Nd(OAc)3], R1 = 0.0430 [I 0 > 2σ(I0)]. Most of the Nd3+ cations are coordinated by nine (or eight) oxygen atoms of acetate ligands which bridge these polyhedra to slightly waved layers which are stacked in the [010] direction.
Photon upconversion in Yb3+-Tb3+ and Yb3+-Eu3+ activated core/shell nanoparticles with dual-band excitation
Dong, Hao,Sun, Ling-Dong,Wang, Ye-Fu,Xiao, Jia-Wen,Tu, Datao,Chen, Xueyuan,Yan, Chun-Hua
supporting information, p. 4186 - 4192 (2016/06/01)
Exploring novel lanthanide-activated upconversion nanoparticles with distinctive spectral fingerprints and emission lifetimes has long been a great concern for extended optical applications. Herein, we report the study of photon upconversion emissions in Yb3+-Tb3+ and Yb3+-Eu3+ activated nanoparticles with near-infrared excitation. In these nanoparticles, a high content of Yb3+ is required for the simultaneous excitation of two Yb3+ ions, yielding a Yb3+ dimer with a higher excited energy to upconvert photons onto Tb3+ and Eu3+. The optimum doping concentration of Yb3+ ions for Yb3+-Tb3+ and Yb3+-Eu3+ pairs was determined to be 80% and 60%, respectively, which are much higher than that of Yb3+-Er3+/Tm3+ pairs. Notably, the upconversion emission lifetime of the as-prepared nanoparticles was prolonged to 2.3 ms (Tb3+) and 4.0 ms (Eu3+), respectively. Through the epitaxial growth of a Nd3+ doped shell layer, the upconversion emissions of Tb3+ and Eu3+ were intensified 25-fold. At the same time, an extra excitation band in the shorter near-infrared region from Nd3+ at 808 nm was achieved. Moreover, the emissions of Tm3+ were employed to compensate for those of Tb3+ and Eu3+ for multicolor emissions. These results highlight the upconversion emissions of Tb3+ and Eu3+ for potential multicolor imaging and multiplexed detection applications.
Syntheses, structures and photophysical properties of heterotrinuclear Zn2Ln clusters (Ln = Nd, Eu, Tb, Er, Yb)
Xu, Hai-Bing,Zhong, Ye-Teng,Zhang, Wei-Xiong,Chen, Zhong-Ning,Chen, Xiao-Ming
, p. 5676 - 5682 (2010/09/17)
Heterotrinuclear Zn2Ln (Ln = Nd 2, Eu 3, Tb 4, Er 5, Yb 6) clusters [(Znq2)2](μ-CH3COO){Ln(hfac) 2} (q = 8-hydroxylquinolinate, hfac = hexafluoroacetylacetonate) have been synthesized. The Zn2Ln framework is ligated by two q ligands featuring μ-phenoxo and two q ligands featuring μ3-phenoxo coordination modes, and one μ-CH3COO- anions. Since the short intramolecular separations of Zn...Ln (ca. 3.354-3.373 A) allow energy transfer from Znq2-based sensitizers to the Ln III centres through two energy transfer pathways, the lanthanide luminescence is indeed lighted up by excitation of the Znq 2-based chromopores. Photophysical measurements revealed that these Zn2Ln complexes exhibit the so-called dual emission originating from both Znq2-based luminophores and lanthanide emitters. By virtue of the dual luminescence with complementary colours, the Znq2-based cyan emission and EuIII-centred red luminescence are combined to generate a white-light emission in the Zn 2Eu (3) complex.