Luminescent silver(i ) complexes with pyrazole-tetraphenylethene ligands: turn-on fluorescence due to the coordination-driven rigidification and solvent-oriented structural transformation
| Autor: | Zou-Hong Xu, Yi Lu, Yue Zhao, Wei-Yin Sun, Zi-Qing Huang, Xiao-Hui Liu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Dalton Transactions. 50:2183-2191 |
| ISSN: | 1477-9234 1477-9226 |
| DOI: | 10.1039/d0dt04100a |
| Popis: | A new tetrapyrazole-modified tetraphenylethene (TPE) ligand L was designed and found to display “turn-on” fluorescence when it combines with Ag+ ions in dilute solution by restricting intramolecular rotation of TPE. A series of Ag complexes 1–7 were obtained, and they exhibit excellent fluorescence properties in the solid state. Compared with PF6−, the silver complex with the CF3SO3− anion can further enhance its fluorescence due to the transformation of its structure from Ag2L (2) to Ag4L2 (3). As zero-dimensional complexes, 1 and 3 have excellent piezochromic properties with a color change from blue to green. Furthermore, structural changes of 1 and 3 to the corresponding three-dimensional frameworks 4 and 5 occur upon immersing in ethanol. In addition, 1 can act as a potential fluorescent probe for sensing nitrile compounds. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|