Sequential effects of two cations on the fluorescence emission of a coordination polymer with ZnO core in node.

Distinct changes in the fluorescence emissions of free ligand 5-(1,3-dioxo-1-benzo[de]isoquinolin-2(3)-yl)isophthalic acid (HNAPHISO) than a 2D-zinc-coordination polymer of it, caused by sequential interactions with different sets of binary cations were observed. The coordination polymer having unsymmetrical ZnO core of tetranuclear zinc-node could be dispersed in dimethylformamide without its degradation. The coordination polymer had an emission peak at 435 nm (quantum yield = 0.

Bi-component sensing platform for the detection of Cd, Feand Fe ions.

The ability of -(1,3-dioxo-1-benzo[de]isoquinolin-2(3)-yl)isonicotinamide (naphydrazide) or 2,6-pyridinedicarboxylic acid (2,6-Hpdc) individually or as a bi-component system in distinguishing and detecting Fe or Fe and Cd ions was investigated. The use of these molecules as single or bi-component analytes in absorption or emission spectroscopy studies showed that under specific conditions each had their own merits for specific purposes. UV-visible spectroscopic studies of 2,6-Hpdc for assessing the interactions with ferrous and ferric ions showed characteristic distinctions.