ArticleJournal of materials chemistry. C2019
Directed Polymorphism and Mechanofluorochromism of Conjugated Materials through Weak Non-Covalent Control.
Article in Journal of materials chemistry. C, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
4 citing papers in PubMed.
- Mechanofluorochromism (MFC) of Donor-π-Acceptor (D-π-A)-Type Fluorescent Dyes.Chemical record (New York, N.Y.) · 2026Review
- Bifurcated Polymorphic Transition and Thermochromic Fluorescence of a Molecular Crystal Involving Three-Dimensional Supramolecular Gear Rotation.Journal of the American Chemical Society · 2024Article
- Mechanofluorochromism of (D-π-)RSC advances · 2022Article
- Optical Characteristics and Applications of AIE Racemic C6-Unsubstituted Tetrahydropyrimidines.Frontiers in chemistry · 2021Review
Corrections and comments
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Authors and funding
6 authors.
Funding
Abstract
Understanding and manipulating crystal polymorphism can provide novel strategies for materials discovery in organic optoelectronics. In this paper, a series of seven ester-terminated three-ring phenylene ethynylenes (PEs) exhibit structure-dependent polymorphism wherein alkyl chain length modulates the propensity to form violet or green fluorescent solid phases, as well as tunable thermal and mechanofluorochromic (MFC) transitions. These compounds harness "soft" non-covalent control to achieve polymorphism: the electronic substituent effect of the ester groups weakens the fluoroarene-arene (ArF-ArH) interactions that typically direct crystal packing of this class of compounds, increasing competitiveness of other interactions. Small structural modifications tip this balance and shift the prevalence of violet- or green-emitting polymorphs. Compounds with short alkyl chain lengths show both violet and various green fluorescent polymorphs, while the violet fluorescent form dominates with alkyl lengths longer than butyl. Further, thermally induced green-to-violet fluorescent crystal-to-crystal transitions occur for single crystals of
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Registered trials
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