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Synthesis and Luminescence Properties of Dumbbell-Shaped Molecules Combined with Rod and Disc-Like Mesogens
- Authors
- Choi, E-Joon; Xu, Fei
- Issue Date
- 2010
- Publisher
- TAYLOR & FRANCIS LTD
- Keywords
- 1; 3; 4-oxadiazole; blue light emitting; discotic columnar mesophase; dumbbell-shaped mesogen; organic light-emitting diode
- Citation
- MOLECULAR CRYSTALS AND LIQUID CRYSTALS, v.529, pp 147 - 156
- Pages
- 10
- Journal Title
- MOLECULAR CRYSTALS AND LIQUID CRYSTALS
- Volume
- 529
- Start Page
- 147
- End Page
- 156
- ISSN
- 1542-1406
1543-5318
- Abstract
- A novel series of dumbbell-shaped molecules containing 1,3,4-oxadiazole moieties (OXDn: n=1, 2, and 3) was designed and synthesized. The molecular structures of these 1,3,4-oxadiazole derivatives were confirmed by FT-IR, 1H-NMR spectroscopy and elemental analyzer. The electron excitation and luminescence properties of these compounds were investigated by UV-vis absorption spectroscopy and photoluminescence spectroscopy both in CHCl3 solution and in solid state. The absorption peaks were found at 336nm-351nm, and the photoluminescent peaks at 410nm-450nm. The thermal properties were investigated by DSC method. Their melting temperatures were in the range of 81-95 degrees C depending on the structure. Especially, OXD1 could show a discotic columnar mesophase at 75 degrees C monotropically.
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