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S. T. Lim, M. H. Chun, K. W. Lee and D. M. Shin, “Organic Light Emitting Diodes with Red Emission Using (2,6-Dimetyhl-4H-pyran-4’-ylidene) Malononitrile Moiety,” Optical Materials, Vol. 21, No. 1-3, 2003, pp. 217-220. doi:10.1016/S0925-3467(02)00139-8

has been cited by the following article:

• TITLE: Column Chromatography: A Facile and Inexpensive Procedure to Purify the Red Dopant DCJ Applied for OLEDs

  AUTHORS: Khadijeh Ghanbari, Hassan Aghajani, Maryam Golbabaee, Elham Naemi Khah, Seyed Hassan Nabavi, Ata Koohian

  KEYWORDS: Purification, Column Chromatography, Absorption, Emission, Quantum Efficiency

  JOURNAL NAME: Advances in Materials Physics and Chemistry, Vol.1 No.3, December 28, 2011

  ABSTRACT: DCJ, one of the DCM derivatives, has been used as a laser dye and a red emitter or a red dopant for OLED devices in recent decade. 4-(dicyanomethylene)-2-methyl-6-(julolidyl-9-enyl)-4H-pyran (DCJ) containing julolidine group has been synthesized for use as a red fluorescent dye molecule in organic light-emitting di- odes (OLEDs). In this paper, we reported a facile, simple and inexpensive procedure of purification of DCJ without necessity of HPLC analysis. The maximum absorption, emission, quantum efficiency are increasing in DCJ with the electron-donating of julolidine group.