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Issue 44, 2019
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Phenanthroimidazole derivatives with minor structural differences: crystalline polymorphisms, different molecular packing, and totally different mechanoluminescence

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Abstract

Two crystalline polymorphs of tPTI-Bpin displayed opposite mechanoluminescence (ML) performance, and had different space groups of P21/c (ML-active tPTI-B1) and P[1 with combining macron] (ML-inactive tPTI-B2), respectively. For comparison, another analogue molecule of PTI-Bpin was designed. Careful analysis of their crystal structures demonstrated that the special triangle-like molecular packing mode of tPTI-B1 mainly accounted for its distinctive ML behavior. Regardless of its minor difference in chemical structure from that of tPTI-Bpin, PTI-B without the ML property has similar parallelogram-like molecular packing to tPTI-B2, further confirming that the ML property is highly related to the molecular packing rather than the chemical structure.

Graphical abstract: Phenanthroimidazole derivatives with minor structural differences: crystalline polymorphisms, different molecular packing, and totally different mechanoluminescence

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Publication details

The article was received on 23 Sep 2019, accepted on 22 Oct 2019 and first published on 23 Oct 2019


Article type: Communication
DOI: 10.1039/C9TC05218F
J. Mater. Chem. C, 2019,7, 13759-13763

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    Phenanthroimidazole derivatives with minor structural differences: crystalline polymorphisms, different molecular packing, and totally different mechanoluminescence

    Y. Yu, Y. Fan, C. Wang, Y. Wei, Q. Liao, Q. Li and Z. Li, J. Mater. Chem. C, 2019, 7, 13759
    DOI: 10.1039/C9TC05218F

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