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Synthesis and Photophysical Properties of a Series of Dimeric Indium Quinolinates.

ABSTRACT: A novel class of quinolinol-based dimeric indium complexes (1-6) was synthesized and characterized using ¹H and ¹³C(¹H) NMR spectroscopy and elemental analysis. Compounds 1-6 exhibited typical low-energy absorption bands assignable to quinolinol-centered ?-?* charge transfer (CT) transition. The emission spectra of 1-6 exhibited slight bathochromic shifts with increasing solvent polarity (p-xylene < tetrahydrofuran (THF) < dichloromethane (DCM)). The emission bands also showed a gradual redshift, with an increase in the electron-donating effect of substituents at the C5 position of the quinoline groups. The absolute emission quantum yields (?_PL) of compounds 1 (11.2% in THF and 17.2% in film) and 4 (17.8% in THF and 36.2% in film) with methyl substituents at the C5 position of the quinoline moieties were higher than those of the indium complexes with other substituents.

SUBMITTER: Kwak SW

PROVIDER: S-EPMC7793487 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature

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Synthesis and Photophysical Properties of a Series of Dimeric Indium Quinolinates.

Kwak Sang Woo SW Hong Ju Hyun JH Lee Sanghun S Kim Min M Chung Yongseog Y Lee Kang Mun KM Kim Youngjo Y Park Myung Hwan MH

Molecules (Basel, Switzerland) 20201223 1

A novel class of quinolinol-based dimeric indium complexes (1-6) was synthesized and characterized using 1H and 13C(1H) NMR spectroscopy and elemental analysis. Compounds 1-6 exhibited typical low-energy absorption bands assignable to quinolinol-centered π-π* charge transfer (CT) transition. The emission spectra of 1-6 exhibited slight bathochromic shifts with increasing solvent polarity (p-xylene < tetrahydrofuran ...[more]

PMID: 33374726

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