Journal
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 95, Issue 1, Pages 219-224Publisher
SPRINGER
DOI: 10.1007/s00339-008-5014-0
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Funding
- Academic Research Fund
- Ministry of Education of Singapore
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Liquid chromatography connected with mass spectroscopy reveals that the oxidized form of rubrene is the major impurity in commercial powder of rubrene as well as in rubrene single crystals. One form of rubrene impurity can be transformed into the other. In solution, rubrene undergoes photo-oxidation completely until the red color of the rubrene solution disappears. Single crystals, due to compact packing of molecules and the required molecular shape change during oxidation, oxidize only on the surface.
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