Photoluminescence of bis(8-hydroxyquinoline) zinc (Znq2) and magnesium (Mgq2)

• Authors: Taiju Tsuboi , Yosuke Nakai , Yasuko Torii
• Languages of publication: EN

Abstracts

EN

Absorption and photoluminescence (PL) spectra, PL quantum efficiency, and PL lifetime have been investigated on bis(8-hydroxyquinoline) zinc (Znq2) and magnesium (Mgq2) in solutions and powder. Znq2 and Mgq2 have the lowest-energy absorption band at 376 and 396 nm in acetonitrile solution, respectively, and emission band with peak at 555 and 480 nm. The PL quantum efficiency is 0.03 and 0.45 for Znq2 and Mgq2 in the solution, respectively, while 0.45 and 0.36 in powder. Unlike the case of powders, two PL lifetimes are obtained in solutions. The longer lifetime is attributed to molecule having interaction with its neighboring molecule, while the shorter one to the isolated single molecule.

Keywords

EN

photoluminescence; metal chelates; quantum efficiency; PL lifetime

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2012
• Volume: 10
• Issue: 2
• Pages: 524-528

Dates

published

1 - 4 - 2012

online

31 - 3 - 2012

Contributors

author

Taiju Tsuboi

• Faculty of Engineering, Kyoto Sangyo University, Kamigamo, Kita-ku, Kyoto, 603-8555, Japan

author

Yosuke Nakai

• Faculty of Engineering, Kyoto Sangyo University, Kamigamo, Kita-ku, Kyoto, 603-8555, Japan

author

Yasuko Torii

• Iwatani Chemical Engineering Ltd., Bodaiji, Konan, Shiga, 520-3242, Japan

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Identifiers

DOI

10.2478/s11534-011-0090-8