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EnglishA new acridine-based fluorescent chemosensor, L2, featuring two sulfurated macrocyclic units has been synthesised. Proton and metal binding properties of L2 have been studied in H2O/CH3CN (1:1 v/v) by potentiometric and spectrophotometric measurements and compared with those of the analogous and previously published bis-macrocyclic receptor featuring two [9]aneN3units (L1). Despite a thermodynamic selectivity observed for Zn2+with both L1 and L2, L2 shows a marked sensing selectivity towards Cd2+via a chelation enhancement of fluorescence (CHEF) effect both in H2O/CH3CN (1:1 v/v) and in H2O using silica core-PEG shell nanoparticles as vehiculant. On the other hand, L1 shows a selective optical sensing towards Zn2+in agreement with the thermodynamic selectivity observed for the same metal ion.
| Titolo: | Zn2+/Cd2+optical discrimination by fluorescent acridine-based bis-macrocylic receptors |
| Autore/i: | Aragoni, M. Carla; Arca, Massimiliano; Bencini, Andrea; Caltagirone, Claudia; Conti, Luca; Garau, Alessandra; Valtancoli, Barbara; Isaia, Francesco; Lippolis, Vito; Palomba, Francesco; Prodi, Luca; Zaccheroni, Nelsi |
| Autore/i Unibo: | |
| Anno: | 2017 |
| Rivista: | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1080/10610278.2017.1387262 |
| Abstract: | A new acridine-based fluorescent chemosensor, L2, featuring two sulfurated macrocyclic units has been synthesised. Proton and metal binding properties of L2 have been studied in H2O/CH3CN (1:1 v/v) by potentiometric and spectrophotometric measurements and compared with those of the analogous and previously published bis-macrocyclic receptor featuring two [9]aneN3units (L1). Despite a thermodynamic selectivity observed for Zn2+with both L1 and L2, L2 shows a marked sensing selectivity towards Cd2+via a chelation enhancement of fluorescence (CHEF) effect both in H2O/CH3CN (1:1 v/v) and in H2O using silica core-PEG shell nanoparticles as vehiculant. On the other hand, L1 shows a selective optical sensing towards Zn2+in agreement with the thermodynamic selectivity observed for the same metal ion. |
| Data stato definitivo: | 2020-02-25T16:44:41Z |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
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