Correlation between Molecular Packing and Optical Properties in Different Crystalline Polymorphs and Amorphous Thin Films of mer-Tris(8-hydroxyquinoline)aluminum(III)
| Autor: | Gregory Gadret, Carlo Taliani, Norberto Masciocchi,‖,⊥,∇ and, Martin Brinkmann, Angelo Sironi, Michele Muccini |
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| Rok vydání: | 2000 |
| Předmět: | |
| Zdroj: | Journal of the American Chemical Society. 122:5147-5157 |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/ja993608k |
| Popis: | Since 1987, high-luminance low-voltage driven devices based on tris(8-hydroxyquinoline)aluminum(III) (Alq3) opened the route to design low-cost large area displays and illuminators. Despite the large number of studies devoted to this material, very little is known about its basic structural and optical properties in the solid state. Therefore, we have investigated the structure(s) and the correlation between intermolecular interactions and optical properties in various Alq3 systems, including solution, amorphous thin films, and different crystalline forms. Two novel unsolvated polymorphs of Alq3, namely, α-Alq3 and β-Alq3, have been synthesized and their crystalline structures determined from X-ray diffraction data on powders (α) and single crystals (β). Crystals of α-Alq3 are triclinic, space group P-1, a = 6.2586(8) A, b = 12.914(2) A; c = 14.743(2) A, α = 109.66(1)°; β = 89.66(1)°, and γ = 97.68(1)°; crystals of β-Alq3 are triclinic, space group P-1, a = 8.4433(6) A, b = 10.2522(8) A; c = 13.1711(10) A... |
| Databáze: | OpenAIRE |
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