The pressure effect on the photoluminescence and Raman spectra of Nd(DBM)3·Phen |
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Authors: | QG Zeng ZJ Ding |
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Institution: | a Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei 23006 Anhui, People's Republic of China b Department of Astronomy and Applied Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China |
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Abstract: | Photoluminescence and Raman spectra of rare earth complex Nd(DBM)3·Phen (DBM, dibenzoylmethane; Phen, 1,10-phenanthroline) are measured at high pressures. A new Raman band appearing at 1070 cm−1 indicates a second-order phase transition around 5.0 GPa. Although the crystal lattice is destroyed for pressures higher than 7.1 GPa, photoluminescence spectra show that the emission intensity of Nd3+ is enhanced dramatically with the pressure increasing up to 9.9 GPa, which is attributed to an efficient intramolecular energy transfer from the ligand to Nd3+. By analyzing the energy of the ground and excited states at 9.9 GPa, the 4H11/2 energy level is considered as the main resonance energy level that efficiently accepts the transferred energy from the ligand. |
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Keywords: | 34 30 +h 33 70 &minus w 33 50 &minus j |
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