Bis-heteroleptic Ru(ii) polypyridine complex-based luminescent probes for nerve agent simulant and organophosphate pesticide

Abstract

Two bis-heteroleptic Ru(ii) complexes of a 4,7-dihydroxy-1,10-phenanthroline ligand were synthesized for the detection of the nerve agent gas mimic, DCP, and the organophosphate pesticide, dichlorvos, through the “off–on” luminescence response.

Cyclometalated iridium(iii) complex of a 1,2,3-triazole-based ligand for highly selective sensing of pyrophosphate ion

“…[47][48][49][50] Metal polypyridine complexes with d 6 electronic configuration have been extensively used as molecular sensors and optoelectronic devices because of their visible excitation, long excited-state lifetime, large Stokes shift, and tunable photophysical properties. [51][52][53] Cyclometalated iridium(III) polypyridine complexes have emerged as suitable candidates in luminescent sensing and biological applications because of their good solubility in most solvents, low cytotoxicity, good cell permeability, and exceptional charge-transfer properties, which can be tuned over wide spectral ranges by choosing an appropriate ligand. 29,30,54-57,58a Recently, we and others reported Ru (II) complexes of 1,2,3-triazole-based ligand for the detection of phosphate ions (HP 2 O 7 3− and H 2 PO 4 − ) through C-H⋯X (X = phosphate ions) interactions (Fig.…”

Recent Advances of Chemosensors for Nerve Agents

“…Khatua′s group reported two bisphenol Ruthenium(II) complexes 30 and 31 based on 4,7‐dihydroxy‐1,10‐phenanthroline ligands for real‐time detection of DCP at the μM level (Figure 13). [48] Probes 30 and 31 can exclude interferences like diethyl cyanophosphonate (DECP), hydrochloric acid (HCl), lung drugs and other competing analytes. The detection of DCP was achieved via a nucleophilic attack of two hydroxyl groups of the 4, 7‐dihydroxy‐1,10‐phenanthroline ligand with DCP by forming bulkier phosphotriester and corresponding PL enhancement.…”

A Turn-On and Colorimetric Probe Based on Isophorone Skeleton for Detecting Nerve Agent Mimic Diethyl Chlorophosphite

“…At present, fluorescent probes used to detect DCP are mainly based on nucleophilic substitution reactions. In general, some nucleophiles were used to detect DCP including imino [ 22 , 23 ], pyridine [ 24 , 25 ], oxime [ 26 , 27 ], hydroxyl group [ 28 , 29 ], etc. Among them, some probes are turn-off fluorescent probes.…”