Synthesis and recognition behavior studies of indole derivatives

Aggregation-induced emission-active azines for chemosensing applications: a five-year update

“…The probe functioned well as a selective copper ion sensor by 1 : 1 complexation and offered an LOD of 0.03 μM. Similarly, Tiwari et al, 48 Ye et al, 49 Liu et al, 50 Kumarasamy et al, 51 53 The probe, 17, exhibited weak emission in MeOH due to intramolecular rotations and a typical AIE behavior in >70% H 2 O-CH 3 CN resulting in intense emission. The azine could detect Al 3+ in a turn-on manner in MeOH with a limit of detection of 0.27 μM, along with a notable colorimetric response.…”

“…The probe functioned well as a selective copper ion sensor by 1 : 1 complexation and offered an LOD of 0.03 μM. Similarly, Tiwari et al , 48 Ye et al , 49 Liu et al , 50 Kumarasamy et al , 51 and Sharifi et al 52 demonstrated different symmetrical and unsymmetrical azine-based probes ( 10a , 13–16 ) with emission in the blue to green region for the detection of Cu 2+ ions [Table 1, entries 5–9].…”

Metal recognition behaviour study of coumarin containing benzimidazole moiety

“…However, the number of studies is relatively limited. A coumarin and benzimidazole-based pyridine fluorescent sensor have been developed for detecting Cu 2+ ions in deionized water, and the detection limit was 8.5 and 3 nM (Kumarasamy et al, 2022;Kumarasamy et al, 2023). Moreover, the detection limits in the above-mentioned studies are still lower than the legal acceptability values given by WHO and EU-WFD standards for drinking water samples (31.5 μM).…”

“…In recent years, fluorescence chemosensors have gained significant attention for detecting Cu 2+ ions due to their advantages over traditional analytical methods in terms of sensitivity, selectivity, simplicity, and non-destructiveness (Sahoo et al, 2016;Venkatesan et al, 2019). Copper ions may be monitored using several diverse mediums, including rhodamine, coumarin, fluorescein, BODIPY and cyanine (Huang et al, 2021;Kumarasamy et al, 2022). The fluorescence sensors based on coumarin derivatives described in the literature are among the most sensitive and selective of these organic compounds for detecting Cu 2+ ions with high accuracy (Devendhiran et al, 2021).…”

“…Our study includes the development of novel sensors for the selective detection of specific metal ions. Our lab has described a novel indole and BODIPY-based chemosensor for Cu 2+ and Ni 2+ ions (Huang et al, 2021;Kumarasamy et al, 2022) and a coumarin-based chemosensor for CNions (Devendhiran et al, 2021). However, the number of studies is relatively limited.…”