The ligand 2, in which three fluorogenic 6-methoxy-1-methylquinolinium fragments are appended to a mesityl platform, in MeCN forms 1:1 adducts with halides and other inorg. anions. 1H NMR studies and mol. modeling indicate that 2 provides a cavity for anion inclusion and establishes electrostatic interactions with the guest. Anion inclusion induces quenching of the fluorogenic fragments with an efficiency decreasing along the series Br->>I->NCS->>Cl->NO3->HSO4-. The fluorometric response of 2 to anions is orders of magnitude more sensitive than that of just 6-methoxy-1-methylquinolinium, ligand 1.
A Concave Fluorescent Sensor for Anions Based on 6-Methoxy-1-methylquinolinium
AMENDOLA, VALERIA;FABBRIZZI, LUIGI;MONZANI, ENRICO
2004-01-01
Abstract
The ligand 2, in which three fluorogenic 6-methoxy-1-methylquinolinium fragments are appended to a mesityl platform, in MeCN forms 1:1 adducts with halides and other inorg. anions. 1H NMR studies and mol. modeling indicate that 2 provides a cavity for anion inclusion and establishes electrostatic interactions with the guest. Anion inclusion induces quenching of the fluorogenic fragments with an efficiency decreasing along the series Br->>I->NCS->>Cl->NO3->HSO4-. The fluorometric response of 2 to anions is orders of magnitude more sensitive than that of just 6-methoxy-1-methylquinolinium, ligand 1.File in questo prodotto:
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