Solvent‐Induced and Temperature‐Promoted Aggregation of Bipyridine Platinum(II) Triangular Metallacycles and Their Near‐Infrared Emissive Behaviors
| Autor: | Alan Kwun-Wa Chan, Vivian Wing-Wah Yam, Yeye Ai, Zhang-Wen Wei, Eugene Yau-Hin Hong, Yongguang Li, Maggie Ng |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
010405 organic chemistry Organic Chemistry Stacking chemistry.chemical_element General Chemistry Crystal structure 010402 general chemistry 01 natural sciences Catalysis 0104 chemical sciences Solvent Crystallography Bipyridine chemistry.chemical_compound chemistry Self-assembly Absorption (chemistry) Platinum Alkyl |
| Zdroj: | Chemistry – A European Journal. 24:11611-11618 |
| ISSN: | 1521-3765 0947-6539 |
| Popis: | A series of bipyridine platinum(II) complexes with different sizes of triangular metallacycles and alkyl/oligoether chains has been synthesized and characterized. They are packed in a zig-zag fashion with the formation of dimeric structures according to their X-ray crystal structures. Different emission origins are observed due to the different sizes of the triangular ligands. Their morphologies could be tuned by the modification of the molecular structures with different metallacyclic alkynyl ligands and alkyl/oligoether chains and solvents. More interestingly, unusual electronic absorption changes and upfield shifts of the aromatic proton resonances are observed upon increasing the temperature, suggesting further aggregation of the architectures. Near-infrared (NIR) emission is also realized through the tuning of the π-π stacking, Pt⋅⋅⋅Pt interactions, and the packing of planar metallacycles. |
| Databáze: | OpenAIRE |
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