The effect of cetyltrimethylammonium ion and type of smectites on the luminescence efficiency of bis(8-hydroxyquinoline)zinc(II) complex

Patcharaporn Pimchan, Nithima Khaorapapong, Makoto Ogawa

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A luminescence metal complex, bis(8-hydroxyquinoline)zinc(II) (Znq2), was incorporated into the interlayer space of smectites (a natural montmorillonite and a synthetic saponite) by two different ways; colloidal processes via the in situ formation of bis(8-hydroxyquinoline)zinc(II) in cetyltrimethylammonium-smectites (CTA-smectites) and the adsorption of cetyltrimethylammonium coated bis(8-hydroxyquinoline)zinc(II) (Znq2CTA) into hydrophilic smectites. The UV-Vis spectra confirmed the formation and the incorporation of bis(8-hydroxyquinoline)zinc(II) in the interlayer space of smectites. The photoluminescence bands of Znq2CTA@montmorillonite and Znq2@CTA-montmorillonite (498nm) were blue shifted in comparison with the weak emission bands of Znq2CTA@saponite and Znq2@CTA-saponite (510nm), indicating the formation of different nanostructures and/or packing of bis(8-hydroxyquinoline)zinc(II) in the two types of smectites. The state of the intercalated cetyltrimethylammonium ions also played a key role to the luminescence intensities of the products due to the concentration quenching and self-absorption.

Original languageEnglish
Pages (from-to)223-228
Number of pages6
JournalApplied Clay Science
Publication statusPublished - 2014 Nov 1



  • 8-Hydroxyquinoline
  • Bis(8-hydroxyquinoline)zinc(II)
  • Cetyltrimethylammonium ion
  • Montmorillonite
  • Saponite

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geology

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