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Intercalation of 8-hydroxyquinoline into a1-smectites by solid-solid reactions

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Tris(8-hydroxyquinoline)aluminum(III) complexes (Alq3), one of the molecules studied most widely for organic light-emitting devices, were formed in the interlayer spaces of smectites by solid-solid reactions between Al-smectites (Al-montmorillonite and Al-synthetic saponite (Sumecton)) and 8-hydroxyquinoline (8Hq) at room temperature. The intercalation of 8-hydroxyquinoline molecules into Al-smectites was demonstrated by powder XRD, FTIR, DTA, TG, TG-MS, and chemical analysis. The coordination of the ligand to the interlayer Al cations was proved by FTIR, UV-Vis, and photoluminescence spectroscopies. The luminescence intensity of Alq3-Sumecton was much greater than that of Alq3-montmorillonite, and this was ascribed to the very small amount of quenching impurities in Sumecton.
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Keywords: 8-HYDROXYQUINOLINE; MONTMORILLONITE; SOLID-STATE INTERCALATION; SUMECTON SA; SYNTHETIC SAPONITE; TRIS(8-HYDROXYQUINOLINE)ALUMINUM(III) COMPLEX

Document Type: Research Article

Publication date: 01 August 2002

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