Observation of crystallisation dynamics by crystal-structure-sensitive room-temperature phosphorescence from Au(I) complexes
| Autor: | Masakazu Tamaru, Kyosuke Nakamura, Hitoya Nakasato, Manami Nakata, Kyohei Hisano, Osamu Tsutsumi, Kaori Fujisawa, Yuki Kuroda |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Crystal growth 02 engineering and technology Crystal structure 010402 general chemistry 01 natural sciences Biochemistry law.invention lcsh:Chemistry Crystal law Materials Chemistry Environmental Chemistry Crystallization Alkyl chemistry.chemical_classification General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Crystallography lcsh:QD1-999 Nanocrystal chemistry 0210 nano-technology Phosphorescence Luminescence |
| Zdroj: | Communications Chemistry, Vol 3, Iss 1, Pp 1-8 (2020) |
| ISSN: | 2399-3669 |
| DOI: | 10.1038/s42004-020-00382-1 |
| Popis: | The aggregation behaviour of Au(I) complexes in condensed phases can affect their emission properties. Herein, aggregation-induced room-temperature phosphorescence (RTP) is observed from the crystals of trinuclear Au(I) complexes. The RTP is highly sensitive to the crystal structure, with a slight difference in the alkyl side chains causing not only a change in the crystal structure but also a shift in the RTP maximum. Furthermore, in nanocrystals, reversible RTP colour changes are induced by phase transitions between crystal polymorphs during crystal growth from solution or the pulverisation of bulk crystals. The colour change mechanism is discussed in terms of intermolecular interactions in the crystal structure of the luminescent aggregates. The results suggest that the behaviour in nanocrystals may differ from that in bulk crystals. These insights will advance the fundamental understanding of crystallisation mechanisms and may aid in the discovery of new materials properties for solids with nano- to micrometre sizes. The properties of nano-crystalline materials depend heavily on their size, therefore, understanding early crystallization processes is crucial. Here, the relationship between phosphorescence and crystal structures of three crystallizing Au(I) complexes bearing n-alkyl chains of different lengths is studied. |
| Databáze: | OpenAIRE |
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