Cation Sensing of Pyridoxal Derived Sensors Towards Fe (II) Ion in Pure Aqueous Solution.

Abstract

A novel sensor (L) was synthesized using Schiff base reaction of pyridoxal with orthophenylene diamine and was characterized by various spectroscopic techniques such as FTIR, 1 H NMR and Mass spectrometry. The cation recognition ability of the synthesized sensor was investigated by experimental (UV-VIS, IR and 1 H NMR) and theoretical (B3LYP/6-31G**) methods. Among the tested anions, the developed sensor showed a naked-eye detectable color change from colorless to yellow and spectral changes in the presence of Fe(II) due to the formation of hydrogen bonded complexes with these cations followed by the partial deprotonation of sensor. With a micromolar detection limit, the developed sensor proved highly efficient and can be utilized for the colorimetric detection of Fe(II) ions.

Enhanced chemical sensing for Cu2+ based on composites of ZIF-8 with small molecules

“…Pyridoxal and Rhodamine B are well-known platforms for the development of uorescent or colorimetric chemosensors for metal ions. [23][24][25] Herein, we propose using these two kinds of small molecules to assemble the ZIF-8 sensor for Cu 2+ with excellent spectral properties, sensing efficiency and biocompatibility.…”