Abstract
A new organic ligand, 2-allyl-1,3-diphenyl-1,3-propanedione (ADP), and the corresponding quaternary Eu3+ complex, bi (ADP) (dibenzoyl methane) (1,10-phenanthroline) europium(III) [Eu(ADP)2(DBM)(Phen)] have been synthesized. Excellent red luminescence from the Eu3+ complex was observed excited at 419 nm, and the broad visible excitation band is attributed to excimer absorption. The luminescence quantum yield excited at 419 nm (34 ± 3%) was higher than that at 380 nm (30 ± 3%). This is the first time to find strong and high yield excimer excitation absorption for a europium complex at room temperature, therefore, the excimer absorption band located in visible region (400-500 nm). Moreover, very high yields of direct f-f excitation absorption of Eu3+ ions at 466 nm (104 ± 10%) and 536 nm (96 ± 10%) were firstly observed, and the excitation spectrum for the europium complex in solid state is extended in wide region from 220 nm to 580 nm.
Original language | English |
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Pages (from-to) | 457-461 |
Number of pages | 5 |
Journal | Journal of Alloys and Compounds |
Volume | 458 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 30 Jun 2008 |
Scopus Subject Areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
User-Defined Keywords
- Chemical synthesis
- Luminescence
- Optical materials
- Optical properties