Tunable Multicolor Emission in Oligo(4-hydroxyquinoline)

The results on the chemical oxidative polymerization of 4-hydroxyquinoline (HQ) are reported. The treatment of HQ with ammonium peroxydisulphate in an acidic aqueous medium afforded a conjugated quinoline oligomer (OHQ). The spectral analysis results suggested that the polymerization of HQ occurred...

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Bibliographic Details
Published in:Journal of physical chemistry. C 2012-09, Vol.116 (37), p.19934-19940
Main Authors: Bilici, Ali, Doğan, Fatih, Yıldırım, Mehmet, Kaya, İsmet
Format: Article
Language:English
Subjects:
Applied sciences
Electrical, magnetic and optical properties
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
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Summary:The results on the chemical oxidative polymerization of 4-hydroxyquinoline (HQ) are reported. The treatment of HQ with ammonium peroxydisulphate in an acidic aqueous medium afforded a conjugated quinoline oligomer (OHQ). The spectral analysis results suggested that the polymerization of HQ occurred mainly at C3 and C8 positions. The obtained oligomer exhibited an uncommon multicolor emission behavior. Although a wide range of emission colors by using various conjugated oligomer/polymers has been reported in literature many times, quinoline oligomer reported here emitted multicolor when irradiated at different wavelengths. Moreover, a linear relationship was observed between the excitation energy and emission maxima obtained (λEm = −108.82E Ex = +819.07, R 2 = 0.986). This allows us to effectively tune the photoluminescence colors between blue and orange-red.
ISSN:1932-7447
1932-7455
DOI:10.1021/jp304432k