High selectivity up-converted fluorescence turn-on probe for Zn2+ based on PAMAM hydroxy-naphthalene Schiff-bases (C![[double bond, length as m-dash]](https://www.rsc.org/images/entities/char_e001.gif)
N) half-organic quantum dots†
Abstract
The dendrimer PNS-G0 with Schiff-base imines (CN) realizes highly selective and common fluorescence (λex = 400 nm) or up-converted fluorescence (λex = 800 nm) turn-on effect to qualitatively and quantitatively detect zinc ions (Zn2+). The PNS-G0 + Zn2+ complex (CN_Zn_O) fluorescence emitting parts were firstly proposed as half-organic quantum dots (HOQDs). The HOQDs probe PNS-G0 for Zn2+ by the coordination method based on imine isomerization (inhibition) mechanism, which has potential applications in biological imaging, analytical chemistry, and optical physics areas.
![Graphical abstract: High selectivity up-converted fluorescence turn-on probe for Zn2+ based on PAMAM hydroxy-naphthalene Schiff-bases (C [[double bond, length as m-dash]] N) half-organic quantum dots](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C4RA01758G&imageInfo.ImageIdentifier.Year=2014)
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![[double bond, length as m-dash]](https://www.rsc.org/images/entities/h2_char_e001.gif)
N) half-organic quantum dots
