σ‐Conjugation and H‐Bond‐Directed Supramolecular Self‐Assembly: Key Features for Efficient Long‐Lived Room Temperature Phosphorescent Organic Molecular Crystals
| Autor: | Bin Hu, Yixuan Dou, Tangui Le Bahers, Anthony D'Aléo, Jeong Weon Wu, Eunkyoung Kim, Chantal Andraud, Catherine Demangeat, Yann Bretonnière, André Jean Attias |
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| Přispěvatelé: | Building Blocks for Future Electronics Laboratory (2B-FUEL), Yonsei University-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), The University of Tennessee [Knoxville], École normale supérieure - Lyon (ENS Lyon), EWHA Womans University (EWHA), Yonsei University, École normale supérieure de Lyon (ENS de Lyon) |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
010405 organic chemistry Hydrogen bond Intermolecular force Supramolecular chemistry Phosphor General Chemistry 02 engineering and technology General Medicine Chromophore 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences Persistent luminescence Chemical physics [CHIM]Chemical Sciences Self-assembly Phosphorescence 0210 nano-technology |
| Zdroj: | Angewandte Chemie International Edition Angewandte Chemie International Edition, Wiley-VCH Verlag, 2021, 60 (5), pp.2446-2454. ⟨10.1002/anie.202011770⟩ Angewandte Chemie International Edition, 2021, 60 (5), pp.2446-2454. ⟨10.1002/anie.202011770⟩ |
| ISSN: | 1521-3757 0044-8249 1433-7851 1521-3773 |
| Popis: | International audience; Long-lived room temperature phosphorescence from organic molecular crystals attracts great attention. Persistent luminescence depends on the electronic properties of the molecular components, mainly p-conjugated donoracceptor (D-A) chromophores, and their molecular packing. Here, a strategy is developed by designing two isomeric molecular phosphors incorporating and combining a bridge for s-conjugation between the D and A units and a structuredirecting unit for H-bond-directed supramolecular self-assembly. Calculations highlight the critical role played by the two degrees of freedom of the s-conjugated bridge on the chromophore optical properties. The molecular crystals exhibit RTP quantum yields up to 20 % and lifetimes up to 520 ms. The crystal structures of the efficient phosphorescent materials establish the existence of an unprecedented well-organization of the emitters into 2D rectangular columnar-like supramolecular structure stabilized by intermolecular H-bonding. |
| Databáze: | OpenAIRE |
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