Highly fluorescent group 13 metal complexes with cyclic, aromatic hydroxamic acid ligands

Seitz, Michael, Moore, Evan G. and Raymond, Kenneth N. (2008) Highly fluorescent group 13 metal complexes with cyclic, aromatic hydroxamic acid ligands. Inorganic Chemistry, 47 19: 8665-8673. doi:10.1021/ic800269w


Author Seitz, Michael
Moore, Evan G.
Raymond, Kenneth N.
Title Highly fluorescent group 13 metal complexes with cyclic, aromatic hydroxamic acid ligands
Journal name Inorganic Chemistry   Check publisher's open access policy
ISSN 0020-1669
1520-510X
Publication date 2008-10-06
Year available 2008
Sub-type Article (original research)
DOI 10.1021/ic800269w
Open Access Status Not Open Access
Volume 47
Issue 19
Start page 8665
End page 8673
Total pages 9
Place of publication Washington , D.C., U.S.A.
Publisher American Chemical Society
Language eng
Formatted abstract
The neutral complexes of two ligands based on the 1-oxo-2-hydroxy-isoquinoline motif with group 13 metals (Al, Ga, In) show bright blue-violet luminescence in organic solvents. The corresponding transition can be attributed to ligand-centered singlet emission, characterized by a small Stokes shifts of only a few nanometers combined with lifetimes in the range between 1 and 3 ns. The fluorescence efficiency is high, with quantum yields of up to 37% in benzene solution. The crystal structure of one of the indium(III) complexes (trigonal space group R3̅, a = b = 13.0384(15) Å, c = 32.870(8) Å, α = β = 90°, γ = 120°, V = 4839.3(14) Å3, Z = 6) shows a six-coordinate geometry around the indium center, which is close to trigonal-prismatic, with a twist angle between the two trigonal faces of 20.7°. Time-dependent density functional theory calculations (Al and Ga, B3LYP/6-31G(d); In, B3LYP/LANL2DZ) of the fac and mer isomers with one of the two ligands indicate that there is no clear preference for either one of the isomeric forms of the metal complexes. In addition, the metal centers do not have a significant influence on the electronic structure nor, as a consequence, on the predominant intraligand optical transitions.
Keyword Fluorescent dyes
Organometallic compounds
Ligands
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Published online 27 August 2008

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemistry and Molecular Biosciences
 
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Created: Mon, 09 Sep 2013, 20:16:23 EST by Evan Moore on behalf of School of Chemistry & Molecular Biosciences