Synthesis, Characterization, and Photophysical Properties of Luminescent Gallium and Indium Complexes Constructed using Tridentate 6-Azolyl-2,2′-bipyridine Chelates
| Autor: | Chun-Wei Lin, Yuan-Chieh Chiu, Gene-Hsiang Lee, Arthur J. Carty, Yun Chi, Yi-Hwa Song, Yi-Ming Cheng, Pi-Tai Chou |
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| Rok vydání: | 2007 |
| Předmět: |
chemistry.chemical_classification
Denticity Stereochemistry Ligand Dimer Organic Chemistry chemistry.chemical_element Medicinal chemistry Molecular electronic transition 2 2'-Bipyridine Inorganic Chemistry chemistry.chemical_compound chemistry Tetrazole Physical and Theoretical Chemistry Gallium Alkyl |
| Zdroj: | Organometallics. 27:80-87 |
| ISSN: | 1520-6041 0276-7333 |
| DOI: | 10.1021/om700577y |
| Popis: | Three systematically functionalized 6-azolyl-2,2′-bipyridine ligands were prepared from reactions initiated by 6-cyano-2,2′-bipyridine. These ligands readily reacted with the metal alkyl reagents GaMe3 and InMe3 to afford the pentacoordinate complexes [(fpzbpy)MMe2] (1a, M = Ga; 1b, M = In), [(ftzbpy)MMe2] (2a, M = Ga; 2b, M = In), and [(N4bpy)MMe2] (3a, M = Ga; 3b, M = In), in which (fpzbpy)H, (ftzbpy)H, and (N4bpy)H denote 6-pyrazolyl-, 6-triazolyl-, and 6-tetrazolyl-substituted 2,2′-bipyridine, respectively. These complexes exhibited moderate blue-green emission ranging from 412 to 493 nm. On the other hand, treatment of the bidentate 2-pyridyl tetrazole ligand (pyN4)H with InMe3 afforded the bridged dimer [Me2In(pyN4)]2 (4). Calculation based on time-dependent density function theory (TDDFT) showed that the S1 state of complexes 1−3 is mainly attributed to an allowed intraligand π → π* electronic transition located at tridentate chelating moieties, together with a small contribution ( |
| Databáze: | OpenAIRE |
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