Synthesis and photophysical properties of dansyl-based polyamine ligands and their Zn(II) complexes

The synthesis, potentiometric studies and photophysical properties of two new polyamine ligands (L1 and L2) possessing the dansyl chromophore were studied in aqueous 0.15 M NaCl. The compounds show the absorption and emissions bands characteristic of the dansylamide fluorophore and both present intr...

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Bibliographic Details
Main Author: Parola, A. Jorge (author)
Other Authors: Lima, João Carlos (author), Pina, Fernando (author), Pina, João (author), Melo, João Seixas de (author), Soriano, Conxa (author), García-España, Enrique (author), Aucejo, Ricardo (author), Alarcón, Javier (author)
Format: article
Language:eng
Published: 2007
Subjects:
Polyamine ligands
Pyridine ligands
Zn(II) complexes
Chemosensors
Fluorescence
Online Access:http://hdl.handle.net/10316/5057
Country:Portugal
Oai:oai:estudogeral.sib.uc.pt:10316/5057
Description
Summary:The synthesis, potentiometric studies and photophysical properties of two new polyamine ligands (L1 and L2) possessing the dansyl chromophore were studied in aqueous 0.15 M NaCl. The compounds show the absorption and emissions bands characteristic of the dansylamide fluorophore and both present intramolecular excited state proton transfer at intermediate pH ranges. One of the ligands (L2) strongly coordinates Zn(II) leading to fluorescence quenching. A model compound (L3) of the dansyl moiety was also investigated.

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