CINECA IRIS Institutional Research Information System
IRIS è la soluzione IT che facilita la raccolta e la gestione dei dati relativi alle attività e ai prodotti della ricerca. Fornisce a ricercatori, amministratori e valutatori gli strumenti per monitorare i risultati della ricerca, aumentarne la visibilità e allocare in modo efficace le risorse disponibili.
EnglishThe nickel(II) and copper(II) complexes of a new scorpionand in which the side chain has been functionalized with the powerful chromophore 4-amino-7-nitro-benzo-2-oxa-1,3-diazole have been prepared. The pendant arm of the new ligand undergoes pHdependent complexation/decomplexation to the metal centre, with simultaneous deprotonation of the aniline nitrogen atom of the pendant arm, thus inducing drastic modifications of the spectral features of the chromophore and a sharp colour change. The pKa values observed for both complexes change according to the metal promoting the deprotonation, being lower for the Ni complex than for the Cu species, because of the different coordination geometries adopted by the two ions.
Scheda prodotto non validato
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo
| Titolo: | A chromogenic penta-aza scorpionand for nickel(II) and copper(II) ions. |
| Autori: | |
| Data di pubblicazione: | 2004 |
| Rivista: | |
| Abstract: | The nickel(II) and copper(II) complexes of a new scorpionand in which the side chain has been functionalized with the powerful chromophore 4-amino-7-nitro-benzo-2-oxa-1,3-diazole have been prepared. The pendant arm of the new ligand undergoes pHdependent complexation/decomplexation to the metal centre, with simultaneous deprotonation of the aniline nitrogen atom of the pendant arm, thus inducing drastic modifications of the spectral features of the chromophore and a sharp colour change. The pKa values observed for both complexes change according to the metal promoting the deprotonation, being lower for the Ni complex than for the Cu species, because of the different coordination geometries adopted by the two ions. |
| Handle: | http://hdl.handle.net/11571/21222 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
File in questo prodotto:
http://hdl.handle.net/11571/21222
Copyright © 2020