Trimethylsilyl Group Assisted Stimuli Response: Self-Assembly of 1,3,6,8-Tetrakis((trimethysilyl)ethynyl)pyrene

Feng Xu, Takanori Nishida, Kenta Shinohara, Lifen Peng, Makoto Takezaki, Takahiro Kamada, Haruo Akashi, Hiromu Nakamura, Kouki Sugiyama, Kazuchika Ohta, Akihiro Orita, Junzo Otera

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


Substitution of 1,3,6,8-tetraethynylpyrene with sterically bulky trimethylsilyl groups enabled four modes of molecular packing, two polymorphs (triclinic system (Y-form) and "loose" crystal Colho (OK-form)), a "rigid" liquid crystalline phase Colho (OC-form), and an amorphous phase (OA-form), which emitted fluorescence at different wavelengths under UV light. The four phases could be interconverted by physical stimuli such as heating, grinding by mortar and pestle, and exposing to the vapor of organic solvents.

Original languageEnglish (US)
Pages (from-to)556-563
Number of pages8
Issue number3
StatePublished - Feb 13 2017

Bibliographical note

Funding Information:
This work was supported by JSPS KAKENHI Grant Numbers JP16H01164 in Middle Molecular Strategy and JP15K05440, the Okayama Prefecture Industrial Promotion Foundation and Grant for Promotion of OUS Research Projects. AO is grateful to Professor Motohiro Akazome, Chiba University and Professor Hajime Maeda, Kanazawa University for the kind measurement of XRD and the helpful discussion, respectively.

Publisher Copyright:
© 2017 American Chemical Society.


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