Chinese Optics Letters, 2011, 9 (5): 051901, Published Online: Apr. 22, 2011
Efficient two-photon sensitized luminescence of europium (III) complex based on hypersensitive transitions Download: 734次
铕配合物 超灵敏跃迁 双光子吸收 190.4710 Optical nonlinearities in organic materials 000.2190 Experimental physics 260.1560 Chemiluminescence 350.5130 Photochemistry
Abstract
Red frequency-upconversion fluorescence emission is observed in europium (III) complex with encapsulating polybenzimidazole tripodal ligands, pumped with 930- and 1070-nm picosecond laser pulses. The luminescence of transition 5D0->7F2 (612 nm) is induced by two-photon absorption of hypersensitive transitions 7F0->5D2 (465 nm) and 7F1->5D1 (535 nm). Analysis results suggest that the two-photon excitation strength of these hypersensitive transitions is increased dramatically owing to the C3 symmetry of the coordination field.
Meng Shi, Hua Li, Mei Pan, Fufang Su, Lili Ma, Peigao Han, Hezhou Wang. Efficient two-photon sensitized luminescence of europium (III) complex based on hypersensitive transitions[J]. Chinese Optics Letters, 2011, 9(5): 051901.