Details

Autor(en) / Beteiligte

• Xu, Man
• Ou, Chang-Jin
• Gao, Chao
• Lin, Jin-Yi
• Xu, Wei
• Yu, Meng-Na
• Zhu, Wen-Sai
• Lin, Zong-Qiong
• Bai, Lu-Bin
• Han, Ya-Min
• Xie, Ling-Hai
• Huang, Ling
• Xu, Chun-Xiang
• Zhao, Jian-Feng
• Wang, Jian-Pu
• Huang, Wei

Titel

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

Ist Teil von

• Materials chemistry frontiers, 2018-12, Vol.2 (12), p.2307-2312

Ort / Verlag

London: Royal Society of Chemistry

Erscheinungsjahr

2018

Quelle

Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals

Beschreibungen/Notizen

• 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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.