Alkyl Chain Length- and Polymorph-Dependent Photomechanochromic Fluorescence of Anthracene Photodimerization in Molecular Crystals: Role of the Lattice Stiffness

Cheng Zong Kuo, Li Yun Hsu, Yu Shan Chen, Kenta Goto, Subhendu Maity, Yi Hung Liu, Shie Ming Peng, Kien Voon Kong, Teruo Shinmyozu, Jye Shane Yang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Anthracene–pentiptycene hybrid systems 1-Cn, where n refers to the number of carbon atoms in the linear alkyl chain, crystallize in three different polymorphs, denoted Y (yellow), G (green), and B (blue) forms in terms of the fluorescence color. While all Y-form crystals show the same yellow-to-blue fluorescence color response to the photomechanical stress generated by the anthracene [4+4] photodimerization reaction, the four G forms exhibit distinct photomechanofluorochromism (PMFC): from green to blue for G-1-C4, to orange for G-1-C7, to red for G-1-C8, and to red then blue for G-1-C9, and the B forms show no photochromic activity. The intriguing RGB three-color PMFC and abnormal topochemical reactivity of G-1-C9 are attributed to inherent softness of the crystal lattice.

Original languageEnglish
Pages (from-to)11511-11521
Number of pages11
JournalChemistry - A European Journal
Volume26
Issue number50
DOIs
Publication statusPublished - Sep 4 2020

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Organic Chemistry

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