Quantifying factors that influence metal ion release in photocaged complexes using ZinCast derivatives.
Dalton Trans
; 41(26): 8162-74, 2012 Jul 14.
Article
en En
| MEDLINE
| ID: mdl-22491711
ABSTRACT
Two generations of nitrobenzhydrol-based photocages for Zn(2+) have been prepared and characterized. The first series includes the tridentate ZinCast-1 utilizes a bis-pyridin-2-ylmethyl-aniline ligand that forms a 5,5-chelate ring upon metal binding. The related photocages ZinCast-2 with a N-[2-(pyridine-2-yl)ethyl]-N-(pyridine-2-ylmethyl)aniline (5,6-chelate ring) and ZinCast-3 with a N,N-bis[2-(pyridine-2-yl)ethyl]aniline (6,6-chelate ring) were synthesized for comparative studies. The complexes formed by the ions Cu(2+), Zn(2+) and Cd(2+) with three ZinCast and their photoproducts (ZinUnc) were interrogated by UV-Vis spectroscopy. The studies indicate that ZinCast-1 forms complexes of the highest stability and ZinCast-3 exhibits the most significant changes in metal affinity upon uncaging. These results suggest that the changes in nitrogen atom donor ability as well as the initial complex stability must be considered to design a photocage with the desired properties. The composite results were used to design ZinCast-4 and ZinCast-5, the second generation photocages that incorporate an additional adjacent ether ligand into the Zn(2+) chelator.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Zinc
/
Cadmio
/
Cobre
/
Complejos de Coordinación
Idioma:
En
Revista:
Dalton Trans
Asunto de la revista:
QUIMICA
Año:
2012
Tipo del documento:
Article
País de afiliación:
Estados Unidos