2,3-다이시아노피라진계 신규형광 물질의 합성과 광학 특성 제어 연구
- 2,3-다이시아노피라진계 신규형광 물질의 합성과 광학 특성 제어 연구
- Other Titles
- Synthesis and Optical Characterization of New Fluorescent Mateirals Derived from 2,3-Dicyanopyrazine
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- 2,3-dicyanopyrazine chromosphore have been interested because of their wide range of application such as biological active materials, nonlinear optical (NLO) materials, emitters for electroluminescence (EL) devices etc. Furthermore, a great deal of interest has been focused on the synthesis and characteristics of multifunctional dyes. Because 2,3-dicyanopyrazine derivatives result from the two strong electron withdrawing cyano group on the pyrazine ring. These dyes could be generally synthesized by link to different functional dyes each other such as fluorescent dyes and photochromic dyes.
In the Chapter 1, novel fluorescent materials derived from 2,3-dicyanopyrazine by through the control of electron density were designed and synthesized and undergoes photocycloaddition reaction with different electron affinities. All compounds were synthesized by through the various reactions such as Wittig, condensation reactions and mainly characterized by 1H-NMR, FT-IR. The photoreaction of the 2,3-dicyanopyrazine were studied as a thin film or in solution with the irradiation under a high pressure Hg lamp, and the spectral changes in the UV absorption intensity and fluorescent intensity were examined at time intervals of exposure. The photodimer showed the property of a negative type photoresist. After irradiation, photodimer became insoluble ethyl acetate : n-Hexane = 1 : 5 due to the [2+2] cycloaddition of 2,3-dicyanopyrazine moieties.
In the Chapter 2, Novel red emitting materials were designed and synthesized. These materials include quite new chemical structures which consist of 2,3-dicyanopyrazine moieties. All compounds were synthesized by through the various reactions such as Wittig, condensation reactions and mainly characterized by 1H-NMR, FT-IR. The 6b of substituted alkylamine based 2,3-dicyanopyrazine has more red shift than 6a of substituted t-butyl benzene based 2,3-dicyanopyrazine. In order to compare the device performance, EL devices were fabricated as the following device configuration: ITO/2-MTDATA (80 nm)/NPB (15 nm)/synthesized compounds (30 nm)/Alq3 (25 nm)/LiF (1 nm)/Al (200 nm). The 6a of substituted t-butyl benzene based device reached a current efficiency of 0.238 cd/A with red region with CIE coordinates of (0.54, 0.42). The 6b of substituted alkylamine device reaches a current efficiency of 1.57 cd/A and green region with CIE coordinates of (0.37, 0.51).
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- GRADUATE SCHOOL[S](대학원) > DEPARTMENT OF FIBER & POLYMER ENGINEERING(섬유고분자공학과) > Theses (Master)
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