Mesogenic gold complexes showing aggregation-induced enhancement of phosphorescence in both crystalline and liquid-crystalline phases
| Autor: | Shigeyuki Yamada, Kaori Fujisawa, Yuki Rokusha, Ryo Kawano, Osamu Tsutsumi |
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| Rok vydání: | 2017 |
| Předmět: |
Chemistry
Mesogen Thermal decomposition Quantum yield 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Crystal Crystallography Phase (matter) Alkoxy group Organic chemistry Chemical stability Physical and Theoretical Chemistry 0210 nano-technology Phosphorescence |
| Zdroj: | Faraday Discussions. 196:269-283 |
| ISSN: | 1364-5498 1359-6640 |
| DOI: | 10.1039/c6fd00157b |
| Popis: | Mesogenic Au complexes with a biphenyl core were synthesized as new AIEgens, and their thermodynamic and photophysical properties were discussed. Similar to Au complexes with a phenyl core which have been reported previously, the complexes with a short alkoxy chain formed dimers in the crystal form. However, the complexes with a long alkoxy chain formed two-dimensional layer structures through multiple intermolecular interactions in both the crystalline and liquid-crystalline (LC) phases. The present Au complexes showed a high thermochemical stability against thermal decomposition and a high thermodynamic stability of the LC phase. Moreover, these materials exhibited intensive phosphorescence with a large quantum yield (∼66%) in the crystals. In the crystal and LC phase with a layer structure, the phosphorescence intensity was enhanced only on aggregation. Thus, these mesogenic Au complexes can be expected to be useful as phosphorescent AIEgens. |
| Databáze: | OpenAIRE |
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