Photo-controlled metal-ion (Zn2+ and Cd2+) release in aqueous Tween-20 micelle solution

Literature Information

Publication Date 2012-01-11
DOI 10.1039/C2CP23265K
Impact Factor 3.676
Authors

Xu Zhang, Yi Chen


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Abstract

Photo-controlled metal-ion (Zn2+ and Cd2+) release in aqueous micelle solution (tris-HCl, pH = 7.4) has been described using 2-((2-mercaptophenylimino)methyl) phenol as ligand. It is found that both the ligand-Zn complex (1) and the ligand-Cd complex (2) are stable in micelle solution, and Zn2+ (Cd2+) can be released from the complex with 365 nm light trigger. Accompanying the metal-ion release, the ligand is photo-converted to 2-(benzothiazol-2-yl) phenol (3) as product, and the turn-on fluorescence is detected. The fluorescence intensity increases with the photo-triggered release until Zn2+ (Cd2+) is completely released, which is beneficial for monitoring the process of photo-controlled metal ion release. Control experiments demonstrate that no binding occurs between 3 and Zn2+ (Cd2+) in micelle solution and there is no binding between cations and micelle, either.

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