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Dimeric Electron Transport Materials and Their Use in Electrophotography

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Dimeric electron transport materials having the following general structure were developed.

All these derivatives were made in a three step reaction. First, 9-fluorenone-4-carboxylic acid was chlorinated with thionyl chloride to form 9-fluorenone-4-carbonyl chloride. Second, 9-fluorenone-4-carbonyl chloride was reacted with a diol or dithiol compounds to form a dimeric fluorenone intermediate. Finally, the intermediate was reacted with malononitrile to form the electron transport product. Fourteen new derivatives were made with different linkage groups, X. The final products were purified and their structures confirmed by proton NMR. The glass transition temperature (T g) and electron mobility (μ) was measured for all viable derivatives. Single layer organic photoconductor constructions demonstrated the potential of these electron transport materials for electrophotography.
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Document Type: Research Article

Publication date: January 1, 2003

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