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두 종류의 고리화 리간드가 배위된 이리듐 착물의 합성과 그 발광 특성 연구
朴貴蓮,河潤卿 弘益大學校 科學技術硏究所 2005 科學技術硏究論文集 Vol.16 No.-
The new types of iridium complexes with two kinds of (CˆN) ligands were designed and synthesized to improve the luminescence efficiency by avoiding triplet-triplet (T-T) annihilation. Ir(ppy)_(2)(piq) and Ir(ppy)_(2)(piq-F) were designed and prepared, where ppy, piq and piq-F represent 2-phenylpyridine, 1-(phenyl)isoquinoline and 1-(4'-fluorophenyl)isoquinoline, respectively. These heteroleptic complexes are expected to have a high luminescence efficiency by the intramolecular energy transfer from the energy absorbing ligand (ppy) to the luminescent ligand (piq derivatives), leading to a decrease on quenching or energy deactivation. Luminescent characteristics of the heteroleptic Ir complexes were inviestigated photophysically and compared with homoleptic Ir complexes, Ir(ppy)_(3), Ir(piq)_(3), and Ir(piq-F)_(3).