Two in One: A Dinuclear Ru(II) Complex for Deep-Red Light-Emitting Electrochemical Cells and as an Electrochemiluminescence Probe for Organophosphorus Pesticides

Abstract

The emissive properties of two Ru­(II) complexes, [Ru­(dmbipy)2L1]­[PF6]2 (1) and [Ru2(dmbipy)4L2]­[PF6]4 (2), (where L1 and L2 are π-extended phenanthroline-based ligands and dmbipy = 4,4′-dimethyl-2,2′-bipyridine) have been explored for dual applications, namely, deep-red light-emitting electrochemical cells (LECs) and electrochemiluminescence (ECL) sensors for the detection of organophosphorus pesticides (OPs) that include chlorpyrifos (CPS). A simple single-layer deep-red LEC device comprising 2 is reported that outperforms both its mononuclear derivative 1 and all previously reported dinuclear LECs, with a maximum brightness of 524 cd/m2, an external quantum efficiency of 0.62%, and a turn-on voltage of 3.2 V. Optoelectronic studies reveal that the ECL response of 2 is improved when compared to its mononuclear counterpart 1 and benchmark [Ru­(bipy)3]2+ (3). Modified glassy carbon electrodes coated with 2 are highly sensitive deep-red ECL sensors that facilitate the detection of CPS directly from river water and fruit samples without any complex pretreatment steps, operating over a broad logarithmic concentration range, with a low detection limit.

Water‐Regulated Mechanisms for Degradation of Pesticides Paraoxon and Parathion by Phosphotriesterase: Insight from QM/MM and MD Simulations

“…[8] However, it is still challenging to develop an efficient and environment-friendly way to decontaminate these toxic pesticides. In recent years, a lot of efforts have been made to degrade organophosphorus compounds, [9][10][11][12][13] and the enzymatic hydrolysis provides an effective way for the degrading of organophosphorus pesticides.…”

A Novel Electrochemiluminescence Janus Emitter for Dual‐Mode Biosensing

“…The obtained Ru JPs displayed ECL emission at around +1.19 V in PBS with 20 × 10 −3 m TPA, which was in good agreement with the previous work (Figure 2n, curve b). [ 17 ] In contrast, Ru‐Lu JPs emitted two intense ECL peaks at +0.55 and +1.16 V in PBS (pH 7.4) containing 1.0 × 10 −3 m H 2 O 2 and 20 × 10 −3 m TPA (Figure 2n, curve c), which aligned with the ECL emission peaks of Lu JPs and Ru JPs, suggesting that two ECL luminophores (P‐Lu and P‐Ru) were successfully assembled into JPs. These results confirmed again that the two different ECL luminophores successfully self‐assembled on each hemisphere of Janus emitters.…”

Deep-red light-emitting electrochemical cells based on phosphor-sensitized thermally activated delayed fluorescence

“…In these reported studies, deep-red LECs based on phosphor-sensitized fluorescence 29,30 outperform other types of deep-red LECs, i.e., employing small molecules, [31][32][33][34][35] conjugated polymers, [36][37][38][39][40] and iTMCs. [41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57] Phosphor-sensitized fluorescence has been proven to be useful in increasing device efficiencies of fluorescent OLEDs to the levels similar to those of phosphorescent OLEDs. 62 Phosphorsensitized fluorescent LECs have also been demonstrated to have significantly improved device efficiencies.…”

“…21–28 However, the reported long-wavelength, i.e. , deep-red and near-infrared (NIR) LECs, which have great potential applications in bio-imaging, telecommunication, night-vision displays, and chemical sensing, commonly showed low device efficiencies, 29–61 hindering their commercialization. In these reported studies, deep-red LECs based on phosphor-sensitized fluorescence 29,30 outperform other types of deep-red LECs, i.e.…”