Segregated co-assembly of fullerene–triphenylene hybrid dendrimers in columnar mesophases showing ambipolar charge transport. Issue 25 (14th June 2021)

• Record Type: Journal Article
• Authors: Mu, Bin; Chen, Jian; Chen, Keyang; Zhang, Chunxiu; Chen, Dongzhong
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 25(2021)
• Page Start: 8029
• Page End: 8036
• Publication Date: 2021-06-14
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0tc06006b
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Segregated columnar co-assembly of fullerene–triphenylene hybrid dendrimers enables ambipolar charge-transport properties with the formation of both a hole-transporting triphenylene column and an electron-transporting fullerene array. Abstract : Liquid-crystalline dendrimers with donor triphenylene as the peripheral discotic mesogen and acceptor fullerene as the dendrimer core have been designed and synthesized with the aim of achieving heterojunction ambipolar charge-transport columnar materials. While the low-generation fullerene-core discotic liquid-crystalline dendrimers self-organize into a lamellar structure, the co-assembled mixtures through blending with a low-molar-mass triphenylene derivative successfully form hierarchical columnar superstructures with segregated stacking of the triphenylene discs and fullerene moieties in discrete columns. Such donor–acceptor segregated columnar materials exhibit ambipolar charge-transport behavior, with rather high mobilities reaching 0.012 cm 2 V −1 s −1 for holes and 0.005 cm 2 V −1 s −1 for electrons, as measured by the time-of-flight (TOF) technique. The present work provides a simple and versatile approach for the design of ambipolar conductive columnar liquid-crystalline hybrid dendrimer materials that are promising for organic electronic applications.