Controlling the sensitivity and selectivity for the detection of nitro-based explosives by modulating the electronic substituents on the ligand of AIPE-active cyclometalated iridium(iii) complexes

Abstract

Nitroaromatic compounds are extremely explosive materials that pose a national security risk as well as environmental concerns. The design and development of sensitive and selective compounds for explosive materials are...

AIE-active cyclometalated iridium(iii) complexes for highly efficient picric acid detection in aqueous media

“…From the linear fitting data, the LOD was calculated to be as low as 0.6 nM, which is comparable and lower than previously reported PA probes. 44,45,48,59–61 A short response time for detecting picric acid is crucial for suitable applications. So, the time-dependent PL quenching of 1[PF 6 ] in the presence of PA in CH 3 CN/H 2 O (1 : 9, v/v) solution was evaluated.…”

“…50,51 Although several π-electron-rich fluorescent organic chemosensors, organic polymers, and metal−organic frameworks have been employed to detect the presence of electron-deficient nitro-aromatics, 52–57 the development of a suitable and efficient iridium( iii ) complex-based probe with high selectivity for PA is still very rarely reported. 58–61…”

Enhanced TNT vapor sensing through a PMMA-mediated AIPE-active monocyclometalated iridium(iii) complex: a leap towards real-time monitoring

“…Phosphorescent transition-metal complexes have been considered potential candidates in various fields such as chemosensors, 37–41 optoelectronic materials, 42–44 biological probes, 45,46 etc . The role of heavy metals like osmium( ii ) (Os), platinum( ii ) (Pt), and iridium( iii ) (Ir) as triplet emitters in these probes is highly desirable.…”

“…51 Recently, our group (Agarwal et al ) synthesized a series of AIPE-active Ir( iii ) complexes and used them to successfully sense different nitro-based explosives. 41 It was observed that tuning the electronic substituents on phenyl pyridine ligands modulates their sensitivity and selectivity towards different nitro-based explosives. One of the complexes having moderately electron-withdrawing substituents (COOH) was found to be sensitive towards TNT in contact mode (LOD −3.6 ppb) based on the PET mechanism.…”