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Hydrogen-bonded-assisted supramolecular microwires for pure violet lasers: benefits of preventing intermolecular π–π stacking and aggregation in single crystals

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Abstract

Deep-violet lasing at the microscale is crucial for the realization of highly integrated nano-photonic and communication devices. In the work reported herein, we fabricated a type of deep-violet organic microwire laser by suppressing the intermolecular π–π stacking interaction and aggregation based on a hydrogen-bonded-assisted molecular encapsulation mechanism. Interestingly, a regular supramolecular encapsulation layer can be constructed by controlling S[double bond, length as m-dash]O⋯H–C hydrogen-bonded superstructures in crystalline frameworks and simultaneously effectively inhibiting the intermolecular π–π stacking interactions, allowing for single-molecular excitonic behavior. For the synergistic effects of shorter effective conjugated-length and negligible intermolecular excitonic coupling, the microwire therein can act as a high-quality whispering-gallery-mode microcavity for low threshold deep-violet lasing (41 W cm−2, 6 tims lower than those of controlled materials) with an emission peak of 405 ± 2 nm, attributed to 0–1 band emission of a single molecule in diluted solution. Therefore, our work provides a proof-of-concept trial for developing a highly stable and easily processed single crystal via a molecular encapsulation strategy in a supramolecular crystalline framework.

Graphical abstract: Hydrogen-bonded-assisted supramolecular microwires for pure violet lasers: benefits of preventing intermolecular π–π stacking and aggregation in single crystals

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Publication details

The article was received on 09 Aug 2018, accepted on 24 Sep 2018 and first published on 26 Sep 2018


Article type: Research Article
DOI: 10.1039/C8QM00397A
Citation: Mater. Chem. Front., 2018, Advance Article
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    Hydrogen-bonded-assisted supramolecular microwires for pure violet lasers: benefits of preventing intermolecular π–π stacking and aggregation in single crystals

    M. Xu, C. Ou, C. Gao, J. Lin, W. Xu, M. Yu, W. Zhu, Z. Lin, L. Bai, Y. Han, L. Xie, L. Huang, C. Xu, J. Zhao, J. Wang and W. Huang, Mater. Chem. Front., 2018, Advance Article , DOI: 10.1039/C8QM00397A

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