Ritu’s research while affiliated with Netaji Subhas University of Technology and other places

We present the synthesis, characterisation, and application of a novel R2-based fluorescent probe for selective metal ion detection. Comprehensive studies using UV–Vis absorption and photoluminescence spectroscopy revealed strong binding with cobalt (Co²⁺) and aluminium (Al³⁺) ions, with a 2:1 binding stoichiometry (probe: metal) and with a detection limit as low as 5.5 × 10–8 mol/L for aluminium and 3.2 × 10–8 mol/L for cobalt, highlighting its remarkable sensitivity. With no interference from other metal ions, the probe showed outstanding stability and selectivity over a broad pH range. Analyses of actual water samples verified its usefulness in environmental monitoring. To further demonstrate the probe's potential in sophisticated sensing applications, it was also used to build a molecular logic gate. The experimental results were theoretically supported by Density Functional Theory (DFT) calculations, which also shed light on the binding mechanism. The R2 probe is emphasised in this work as a sensitive, specific, and adaptable instrument for environmental analysis and metal ion detection. Graphical Abstract

This article emphasizes the influence of pyridine ring substitutions in 2,2’:6’,2″-terpyridine unit, allowing for precise adjustment of ligand properties. This study explores terpyridine-based molecular systems, with its unique coordination properties assessed against a range of competing metal ions, highlighting the specific affinity of the terpyridine ligand towards aluminium (Al) and cobalt (Co) detection in Acetonitrile–water (ACN-H2O) mixed solvent (80:20). The terpyridine-based probe’s structural component is meticulously designed and detailed investigated to understand their influence on sensing performance. Synthesised probes are characterised using NMR, IR, UV–Vis spectroscopy, and mass spectrometry. Such modifications present ample opportunities to customise the attributes and applications of resultant metal complexes. The interaction between the terpyridine-based probes and target metal ions is investigated through various experimental methods, including fluorescence spectroscopy and UV studies along with unassisted discernment of Cobalt through Naked-Eye. Observation turns out that the limit of detection is 4.4 × 10–8 mol/L for cobalt and 4 × 10–7 mol/L for aluminium and coordination features Showing the binding stoichiometry to be 1:1 for R1. ADME Studies have been performed to analyse pharmacokinetic and biological actions. DFT calculations were performed to investigate the molecular probe’s coordination features and its corresponding metal complex. Graphical Abstract

Heavy metal hazardous and enduring characteristics present a noteworthy risk to both human well‐being and the ecosystem. Heavy metal level monitoring requires accurate and dependable detection techniques. This review emphasizes the requirement for sophisticated detection methods that can address the issues like sensitivity, selectivity, cost and ease of use for the detection of heavy metal ions and allow for more accurate and trustworthy monitoring using various organic moieties. It offers a thorough overview of cutting‐edge organic moiety‐based heavy metal detection techniques. It primarily discusses four different types of substituted core structures, including coumarin, porphyrin, Schiff bases, and terpyridine, along with their mechanisms, methods, detection limits, and appropriate metal bindings. These moieties exhibit strong coordination with heavy metal ions because of their distinct structural characteristics. They produce stable complexes with complicated ligand‐metal interactions that are useful in a variety of applications, including sensing and catalysis. Each probe was chosen based on its propensity or capacity to identify important analytes in practical applications. To increase the effectiveness and productivity of fluorescence sensing, researchers have recently been working to create new fluorescence chemosensors that can identify many ions at once.