Back to Search
Start Over
A Binary Supramolecular Assembly with Intense Fluorescence Emission, High pH Stability, and Cation Selectivity: Supramolecular Assembly-Induced Emission Materials
- Source :
- Research, Vol 2019 (2019)
- Publication Year :
- 2019
- Publisher :
- American Association for the Advancement of Science (AAAS), 2019.
-
Abstract
- We construct a fluorescent supramolecular system (TPE-Q4⊂ DSP5) of excellent tolerance to a wide range of pH by the facile self-assembly of a new pillar[5]arene bearing disulfonated arms (DSP5) with an AIE-active tetraphenylethene-based tetratopic guest bearing four quaternary ammonium binding sites (TPE-Q4), which exhibits strong blue emission even in dilute aqueous solutions along with much higher quantum yield and longer fluorescence lifetime than TPE-Q4 itself. This appreciable property can be attributed to the supramolecular assembly-induced emission (SAIE) mechanism endowed by the host-guest inclusion complexation based on synthetic macrocycles. Remarkably, the enhanced fluorescence of the supramolecular assembly is quenched efficiently and exclusively by ferric ions in water with a high Stern–Volmer formula constant of 1.3 × 105 mol-1, demonstrating the excellent cation selectivity and visualized responsiveness in ion sensing and detection.
- Subjects :
- Science
Subjects
Details
- Language :
- English
- ISSN :
- 26395274
- Volume :
- 2019
- Database :
- Directory of Open Access Journals
- Journal :
- Research
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.7754a1103f9b449fb73ba8e3703c406b
- Document Type :
- article
- Full Text :
- https://doi.org/10.34133/2019/1454562