Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
ISSN-L : 0366-7022
Letter
Hole Transporting Properties of Cyclic Pentamer of 4-Butyltriphenylamine
Kyusun KimRyosuke OhataShinji KanehashiKousuke TsuchiyaKenji Ogino
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2017 Volume 46 Issue 8 Pages 1145-1147

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Abstract

The cyclic pentamer of 4-butyltriphenylamine (CBTPA [5]) was prepared by the Pd-catalyzed C–N coupling reaction followed by purification with a combination of chromatographic techniques. Due to the rigid cyclic structure, the glass-transition temperature of CBTPA [5] was 215 °C. The space-charge-limited current mobility in its amorphous film was determined to be 1.3 × 10−4 cm2 V−1 s−1 which was higher than that of poly(4-butyltriphenylamine) (PBTPA) by a factor of 100. The higher mobility is ascribed to the higher purity of CBTPA [5], monodispersed nature, and homogeneous electron distribution of the highest occupied molecular orbital.

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© 2017 The Chemical Society of Japan
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