Portable smartphone-based detection integrated with paper based device functionalised with green emissive carbon dots for selective determination of Fe ³⁺ ions

Intrinsic Dual-State Emission Zinc-Based MOF Rodlike Nanostructures with Applications in Smartphone Readout Visual-Based Detection for Tetracycline: MOF-Based Color Tonality

“…8−10 Many optical-based applications require stable, durable, and effective luminescent materials. 11,12 Luminescent metal−organic frameworks (LMOFs), as a part of the metal−organic frameworks (MOFs) family, are gaining great attention recently due to their enormous applications in bio(chemical) sensing and bioimaging. 13−16 Although many functionalizations of MOFs have been reported to prepare LMOFs, such as using fluorescent linker in MOF 17 and/or insertion of luminophores into the MOF structure such as nanoclusters, 18 carbon dot, 19 and fluorescent dyes, 20 the fabrication of MOFs with intrinsic luminescence is more practical and valuable for many applications due to stability of the MOFs and low-cost precursors.…”

“…Metal–organic frameworks (MOFs) are porous crystalline materials prepared by metal ions/clusters and organic ligands linking by coordination bonds. − MOFs have been intensively investigated for biochemical applications due to their distinctive physicochemical features including high thermal stability, high surface area, porosity, presence of cavities and functionality. − Many optical-based applications require stable, durable, and effective luminescent materials. , Luminescent metal–organic frameworks (LMOFs), as a part of the metal–organic frameworks (MOFs) family, are gaining great attention recently due to their enormous applications in bio­(chemical) sensing and bioimaging. − Although many functionalizations of MOFs have been reported to prepare LMOFs, such as using fluorescent linker in MOF and/or insertion of luminophores into the MOF structure such as nanoclusters, carbon dot, and fluorescent dyes, the fabrication of MOFs with intrinsic luminescence is more practical and valuable for many applications due to stability of the MOFs and low-cost precursors . In the literature, for the construction of intrinsic LMOFs, lanthanide elements, such as Eu 3+ and Tb 3+ are used. ,,, Such elements have higher costs, potential supply shortages, and adverse effects on the environment.…”

N-doped graphene nanosheets-based optical nano switch for the selective detection of guanine and Pb2+

“…1 Heavy metal ions negatively impact living organisms because of their high water solubility and toxicity, low biodegradability, carcinogenic nature, and environmental persistence. 4–6 Therefore, the efficient removal of heavy metal ions is the foremost crucial step for meeting the needs of a sustainable society and environment. Lead (Pb), with unquestionable toxicity, has been released into natural water from electroplating, paints, anti-corrosive coatings, mining, battery recycling, chemicals, alloys, textiles, and other industries and consumer products.…”

Metal Ion Sensing with Phenylenediamine Quantum Dots in Blood Serum

“…Being time-consuming, these approaches also cannot be considered for in situ monitoring. As an alternative, spectroscopic techniques are being explored, as they offer a faster response and reasonable sensitivity, which makes them a suitable technological compromise. , Indeed, several optically responsive nanomaterials such as quantum dots, plasmonic nanoparticles, and fluorescent polymer dots were reported to effectively detect biological molecules. − Among various fluorescent nanomaterials, carbon dots (CDs) have demonstrated potential as sensing agents of metal ions due to their low photobleaching and good water solubility. ,− For example, it was revealed that fluorescent CDs can be used for the detection of Pd 2+ , Hg 2+ , Fe 2+ , and others. − The response of CDs to metal ions is generally monitored by measuring their fluorescence intensity. Furthermore, there are reports on fluorophore lifetime measurements for ion sensing.…”