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Issue 33, 2018
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Supercooling of functional alkyl-π molecular liquids

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Abstract

Metastable states of soft matters are extensively used in designing stimuli-responsive materials. However, the non-steady properties may obstruct consistent performance. Here we report an approach to eradicate the indistinguishable metastable supercooled state of functional molecular liquids (FMLs), which remains as a liquid for weeks or months before crystallizing, via rational molecular design. The phases (solid, kinetically stable liquid, and supercooled liquid) of a model FML, branched alkyl chain-substituted 9,10-diphenylanthracene (DPA), are found to be governed by subtle alterations of the molecular structure (alkyl-DPA ratio and bulkiness of the DPA unit). We thus outline molecular design principles to avoid supercooled FML formation. Moreover, we demonstrate a practical technique to rapidly discriminate supercooled FMLs (within 5 h) by accelerating their crystallization in differential scanning calorimetry heating via pre-annealing or relatively slow scanning.

Graphical abstract: Supercooling of functional alkyl-π molecular liquids

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Publication details

The article was received on 21 Jun 2018, accepted on 16 Jul 2018 and first published on 17 Jul 2018


Article type: Edge Article
DOI: 10.1039/C8SC02723D
Citation: Chem. Sci., 2018,9, 6774-6778
  • Open access: Creative Commons BY-NC license
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    Supercooling of functional alkyl-π molecular liquids

    F. Lu, K. Jang, I. Osica, K. Hagiwara, M. Yoshizawa, M. Ishii, Y. Chino, K. Ohta, K. Ludwichowska, K. J. Kurzydłowski, S. Ishihara and T. Nakanishi, Chem. Sci., 2018, 9, 6774
    DOI: 10.1039/C8SC02723D

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