Rational synthesis of organic thin films with exceptional long-range structural integrity

Noriya Seiki, Yoshiaki Shoji, Takashi Kajitani, Fumitaka Ishiwari, Atsuko Kosaka, Takaaki Hikima, Masaki Takata, Takao Someya, Takanori Fukushima

Research output: Contribution to journalArticlepeer-review

85 Citations (Scopus)


Highly oriented, domain-boundary-free organic thin films could find use in various high-performance organic materials and devices. However, even with state-of-the-art supramolecular chemistry, it is difficult to construct organic thin films with structural integrity in a size regime beyond the micrometer length scale. We show that a space-filling design, relying on the two-dimensional (2D) nested hexagonal packing of a particular type of triptycene, enables the formation of large-area molecular films with long-range 2D structural integrity up to the centimeter length scale by vacuum evaporation, spin-coating, and cooling from the isotropic liquid of the triptycene. X-ray diffraction analysis and microscopic observations reveal that triptycene molecules form a completely oriented 2D (hexagonal triptycene array) + 1D (layer stacking) structure, which is key for the long-range propagation of structural order.

Original languageEnglish
Pages (from-to)1122-1126
Number of pages5
Issue number6239
Publication statusPublished - 2015 Jun 5
Externally publishedYes

ASJC Scopus subject areas

  • General


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