A new fluorescent probe for distinguishing Zn2+ and Cd2+ with high sensitivity and selectivity

Abstract

A new fluorescence probe for distinguishing Zn(2+) and Cd(2+) is designed and synthesized. For the first time to our knowledge, this probe can recognize similar metal ions by coherently utilizing intramolecular charge transfer (ICT) and different electronic affinities of various metal ions, instead of by selective coordination alone, which may be interfered with and lose its selectivity easily in a complicated environment, providing a distinct recognition even by the naked eye for Zn(2+) and Cd(2+) with the sensitivity at the ppb level. This design strategy may initiate a straightforward approach for the selective detection of various metal ions with similar chemical properties in extensive applications such as environmental, industrial, and bio-science.

Manipulating Metallogel Properties by Luminogens and Their Applications in Cell Imaging

“…Fluorescence spectroscopic studies have also been performed to realize the interactions. The inorganic component C-1 (10 –5 M; MeOH) emits at 475 nm (λ ex , 340 nm) because of an ICT 66 originating from the chelation of the terpyridyl core with Zn 2+ . Upon the addition of the luminogen L-1 (1.0 equiv) to a solution of C-1, the emission due to C-1 appeared at 500 nm with a red shift of 25 nm ( Figure S6 ).…”

Design and synthesis of a new fluorescent probe for cascade detection of Zn2+ and H2PO4− in water and targeted imaging of living cells

“…While other metal ions (Mg 2+ , Na + , K + , Al 3+ , Fe 2+ , Ca 2+ , Ba 2+ , Ce 3+ , Pb 2+ , Mn 2+ , Bi 3+ , Ni 2+ , Cr 3+ , Fe 3+ , Cs + ), displayed no obvious fluorescence response for the emission spectra of Gal‐AQTF. More importantly, as the common metal ion which often responds together with Zn 2+ , Cd 2+ displayed no fluorescence response to Gal‐AQTF. The Cu 2+ ion demonstrated fluorescence quenching effects like other Zn 2+ fluorescence sensors, however, it has little influence on in vivo cell imaging in virtue of the low concentration.…”

Highly selective detection of Zn2+ and Cd2+ with a simple amino-terpyridine compound in solution and solid state

“…[9][10][11][12] However, fluorescent sensors with different fluorescence response to Zn 2+ and Cd 2+ are rare. 13 This is probably because they have similar electron configuration. It is still challenging and urgently needed to develop efficient fluorescent sensors for the detection of Zn 2+ and Cd 2+ with high selectivity and sensitivity.…”