期刊
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
卷 -, 期 25, 页码 4004-4011出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.201200460
关键词
Sensitizers; Spectroelectrochemistry; Photoluminescence; Transient absorbance; Raman spectroscopy; Ruthenium
资金
- National Science Foundation [CHE-1012487]
- Air Force Office of Scientific Research [FA9550-05-1-0276]
- BGSU Research Enhancement Initiative
- Ohio Department of Development (Wright Center for Photovoltaics Innovation and Characterization)
- Ohio Research Scholars Program
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1012487] Funding Source: National Science Foundation
A series of cyclometalated RuII coordination compounds of the general structural formula [Ru(bpy)2(C boolean AND N)]PF6 {C boolean AND N = 2-phenylpyridine (1), 2-(2,4-difluorophenyl)pyridine (2), 2-(4-methoxyphenyl)-5-methylpyridine (3), benzo[h]quinoline (4); bpy = 2,2'-bipyridine} have been synthesized, structurally and electrochemically characterized, and examined by using a battery of spectroscopic techniques. The combination of static and dynamic photoluminescence at room temperature and 77 K, resonance Raman spectroscopy, cyclic voltammetry, spectroelectrochemistry, and ultrafast transient absorption spectroscopy reveal that although the nature of the cyclometalating ligand substantially affects the oxidation potential at the metal center the lowest-energy metal-to-ligand charge-transfer excited state always retains pure Ru?bpy character across this series of molecules, and the cyclometalating subunit plays the role of ancillary ligand.
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