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Published on: August 20, 2007
A Series of Quinolinol-Based Indium Luminophores: A Rational Design Approach for Manipulating Photophysical
Sang Woo Kwak, Moon Bae Kim1, Heuiseok Shin
1Department of Chemistry, Institute for Molecular Science and Fusion Technology , Kangwon National University , Chuncheon , Gangwon 24341 , Republic of Korea.
Abstract:
An approach to the design of a series of quinolinol-based indium complexes that can exhibit different optical properties is proposed. Mono-incorporated (Inq1 and InMeq1), bis-incorporated (InMeq2), and tris-incorporated (Inq3 and InMeq3) indium quinolinate complexes have been prepared. These complexes have also been characterized by X-ray crystallography. The photophysical properties of these complexes have also been examined by a combination of experimental and theoretical techniques. The indium complexes with a single quinolinol ligand (Inq1 and InMeq1) showed higher quantum efficiency than those with two or three quinolinate ligands; in particular, InMeq1 exhibited the highest quantum yield [ΦPL = 59% in poly(methyl methacrylate) film]. The insights into the nature of these findings were obtained by the sequential synthesis of the quinolinol-based indium luminophores and a detailed investigation of their structural stability.
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