scholarly journals Diverse Coordination Numbers and Geometries in Pyridyl Adducts of Lanthanide(III) Complexes Based on β-Diketonate

Inorganics ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 74
Author(s):  
Franz A. Mautner ◽  
Florian Bierbaumer ◽  
Roland C. Fischer ◽  
Ana Torvisco ◽  
Ramon Vicente ◽  
...  
Keyword(s):  
Rare Earth ◽  
Solid State ◽  
Quantum Yield ◽  
Rare Earth Complexes ◽  
Luminescence Spectra ◽  
Excitation Wavelength ◽  
Coordination Numbers ◽  
State Luminescence

Ten mononuclear rare earth complexes of formula [La(btfa)3(H2O)2] (1), [La(btfa)3(4,4′-Mt2bipy)] (2), [La(btfa)3(4,4′-Me2bipy)2] (3), [La(btfa)3(5,5′-Me2bipy)2] (4), [La(btfa)3(terpy)] (5), [La(btfa)3(phen)(EtOH)] (6), [La(btfa)3(4,4′-Me2bipy)(EtOH)] (7), [La(btfa)3(2-benzpy)(MeOH)] (8), [Tb(btfa)3(4,4′-Me2bipy)] (9) and (Hpy)[Eu(btfa)4] (10), where btfa = 4,4,4-trifuoro-1-phenylbutane-1,3-dionato anion, 4,4′-Mt2bipy = 4,4′-dimethoxy-2,2′-bipyridine, 4,4′-Me2bipy = 4,4′-dimethyl-2,2′-bipyridine, 5,5′-Me2bipy = 5,5′-dimethyl-2,2′-bipyridine, terpy = 2,2′:6′,2′-terpyridine, phen = 1,10-phenathroline, 2-benzpy = 2-(2-pyridyl)benzimidazole, Hpy = pyridiniumH+ cation) have been synthesized and structurally characterized. The complexes display coordination numbers (CN) eight for 1, 2, 9, 10, nine for 5, 6, 7, 8 and ten for 3 and 4. The solid-state luminescence spectra of Tb-9 and Eu-10 complexes showed the same characteristic bands predicted from the Tb(III) and Eu(III) ions. The Overall Quantum Yield measured (ϕTOT) at the excitation wavelength of 371 nm for both compounds yielded 1.04% for 9 and up to 34.56% for 10.

High solid-state luminescence in propeller-shaped AIE-active pyridine–ketoiminate–boron complexes

2015 ◽  
Vol 13 (20) ◽  
pp. 5775-5782 ◽  
Author(s):  
Yanping Wu ◽  
Zhenyu Li ◽  
Qingsong Liu ◽  
Xiaoqing Wang ◽  
Hui Yan ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Solid State ◽  
Quantum Yield ◽  
Stokes Shift ◽  
Electronic Structure Calculations ◽  
High Quantum Yield ◽  
X Ray ◽  
Boron Complexes ◽  
Structure Calculations ◽  
State Luminescence

Two pyridine-ketoiminate-based organoboron complexes were demonstrated to possess aggregation-induced emission, large Stokes shift and high quantum yield in the solid-state, which were rationalized through X-ray crystal analysis and electronic structure calculations.

Eight rare earth metal organic frameworks and coordination polymers from 2-nitroterephthlate: syntheses, structures, solid-state luminescence and an unprecedented topology

2016 ◽  
Vol 40 (9) ◽  
pp. 7338-7349 ◽  
Author(s):  
Jermaine A. Smith ◽  
Marvadeen A. Singh-Wilmot ◽  
Korey P. Carter ◽  
Christopher L. Cahill ◽  
Alan J. Lough ◽  
...  
Keyword(s):  
Rare Earth ◽  
Solid State ◽  
Coordination Polymers ◽  
Rare Earth Metal ◽  
Metal Organic Frameworks ◽  
Earth Metal ◽  
Metal Organic ◽  
State Luminescence

An unprecedented report of eight lanthanide(iii) CPs and MOFs from 2-nitroterephthalate which feature four network types, including one novel topology.

scholarly journals Structural Characterization, Magnetic and Luminescent Properties of Praseodymium(III)-4,4,4-Trifluoro-1-(2-Naphthyl)Butane-1,3-Dionato(1-) Complexes

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 179
Author(s):  
Franz A. Mautner ◽  
Florian Bierbaumer ◽  
Roland C. Fischer ◽  
Ramon Vicente ◽  
Ànnia Tubau ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Solid State ◽  
Ground State ◽  
Magnetic Measurements ◽  
Luminescent Properties ◽  
Efficient Energy Transfer ◽  
Coordination Numbers ◽  
Efficient Energy ◽  
Mononuclear Complexes ◽  
State Luminescence

Four new Pr(III) mononuclear complexes of formula [Pr(ntfa)3(MeOH)2] (1), [Pr(ntfa)3(bipy)2] (2), [Pr(ntfa)3(4,4′-Mt2bipy)] (3) and [Pr(ntfa)3(5,5′-Me2bipy)] (4), where ntfa = 4,4,4-trifuoro-1-(naphthalen-2-yl)butane-1,3-dionato(1-), 5,5′-Me2bipy = 5,5′-dimethyl-2,2′-dipyridine, 4,4′-Mt2bipy = 4,4′-dimethoxy-2,2′-dipyridine, have been synthesized and structurally characterized. The complexes display the coordination numbers 8 for 1, 3 and 4, and 10 for 2. Magnetic measurements of complexes 1–4 were consistent with a magnetically uncoupled Pr3+ ion in the 3H4 ground state. The solid state luminescence studies showed that the ancillary chelating bipyridyl ligands in the 2–4 complexes greatly enhance the luminescence emission in the visible and NIR regions through efficient energy transfer from the ligands to the central Pr3+ ion; behaving as “antenna” ligands.

Controlled synthesis and optimum luminescence of Sm3+-activated nano/submicroscale ceria particles by a facile approach

2014 ◽  
Vol 2 (15) ◽  
pp. 2786-2792 ◽  
Author(s):  
Jingjing Wu ◽  
Shikao Shi ◽  
Xiaolong Wang ◽  
Jibiao Li ◽  
Ruilong Zong ◽  
...  
Keyword(s):  
Rare Earth ◽  
Solid State ◽  
Combustion Synthesis ◽  
Solid State Lighting ◽  
Excitation Wavelength ◽  
Controlled Synthesis ◽  
Regular Shape ◽  
Strong Luminescence

Rare-earth Sm3+-activated nano/submicroscale ceria particles with suitable excitation wavelength, regular shape and strong luminescence have been prepared by PVA-assisted combustion synthesis, which is expected to meet the demands of solid state lighting.

AIE-active organoboron complexes with highly efficient solid-state luminescence and their application as gas sensitive materials

2015 ◽  
Vol 44 (31) ◽  
pp. 14063-14070 ◽  
Author(s):  
Shuwen Gong ◽  
Qingsong Liu ◽  
Xiaoqing Wang ◽  
Bo Xia ◽  
Zhipeng Liu ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Solid State ◽  
Quantum Yield ◽  
Stokes Shift ◽  
Electronic Structure Calculations ◽  
High Quantum Yield ◽  
X Ray ◽  
High Quantum ◽  
Structure Calculations ◽  
State Luminescence

Four benzothiazole–ketoiminate-based organoboron complexes were demonstrated to show aggregation-induced emission, a large Stokes shift and high quantum yield in the solid-state, which were rationalized through X-ray crystal analysis, and electronic structure calculations.

Hydrothermal Synthesis and Solid-State Laser Refrigeration of Ytterbium-Doped Potassium Lutetium Fluoride (KLF) Microcrystals

2020 ◽  
Author(s):  
Xiaojing Xia ◽  
Anupum Pant ◽  
Xuezhe Zhou ◽  
Elena Dobretsova ◽  
Alex Bard ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Solid State ◽  
Information Science ◽  
Point Group ◽  
Solid State Laser ◽  
Lanthanide Ions ◽  
Group Symmetry ◽  
Luminescence Spectra ◽  
Crystalline Phases ◽  
State Laser

Fluoride crystals, due to their low phonon energies, are attractive hosts of trivalent lanthanide ions for applications in upconverting phosphors, quantum information science, and solid-state laser refrigeration. In this article, we report the rapid, low-cost hydrothermal synthesis of potassium lutetium fluoride (KLF) microcrystals for applications in solid-state laser refrigeration. Four crystalline phases were synthesized, namely orthorhombic K<sub>2</sub>LuF<sub>5</sub> (Pnma), trigonal KLuF<sub>4</sub> (P3<sub>1</sub>21), orthorhombic KLu<sub>2</sub>F<sub>7</sub> (Pna2<sub>1</sub>), and cubic KLu<sub>3</sub>F<sub>10</sub> (Fm3m), with each phase exhibiting unique microcrystalline morphologies. Luminescence spectra and emission lifetimes of the four crystalline phases were characterized based on the point-group symmetry of trivalent cations. Laser refrigeration was measured by observing both the optomechanical eigenfrequencies of microcrystals on cantilevers in vacuum, and also the Brownian dynamics of optically trapped microcrystals in water. Among all four crystalline phases, the most significant cooling was observed for 10%Yb:KLuF<sub>4</sub> with cooling of 8.6 $\pm$ 2.1 K below room temperature. Reduced heating was observed with 10%Yb:K<sub>2</sub>LuF<sub>5</sub>

Phase selectivity and tunable photophysical nature of rare earth metal–organic frameworks of EuxY1−x-PTC (H3PTC = 2,4,6-pyridine tricarboxylic acid; x = 0–1)

2020 ◽  
Vol 49 (42) ◽  
pp. 14985-14994
Author(s):  
Xu-Sheng Gao ◽  
Mei-Juan Ding ◽  
Jin Zhang ◽  
Li-Duo Zhao ◽  
Xiao-Ming Ren
Keyword(s):  
Rare Earth ◽  
Solid Solutions ◽  
Rare Earth Metal ◽  
Metal Organic Frameworks ◽  
Earth Metal ◽  
Tricarboxylic Acid ◽  
Excitation Wavelength ◽  
Metal Organic ◽  
Phase Selectivity

All solid solutions (EuxY1−x-PTC, x = 0.013–0.82) are isomorphic to Eu-PTC, but different from Y-PTC, and show phase selectivity as well as excitation wavelength dependent emission.

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