Highly luminescent and stable lanthanide coordination polymers based 2-(3′,4′-dicarboxyphenoxy)-benzoic acid: Crystal structure, photoluminescence, white light emission and fluorescence sensing

Four Novel Cobalt(II) Coordination Polymers Based on Anthracene-Derived Dicarboxylic Acid as Multi-functional Fluorescent Sensors toward Different Inorganic Ions

“…Fluorescence sensing detection of toxic species in environmental and ecological systems with high sensitivity, stability, simplicity, and low cost is considered to be one of the most promising detection methods. , The luminescent coordination polymer (CP) materials with favorable operability, high selectivity, and sensitivity have excellent applications in this field . To date, many fluorescent CP sensors have been explored to detect nitro compounds, antibiotics, small organic molecules, metal cations and anions, − such as rare-earth ,− and transition-metal-based CPs. − …”

Highly pH-stable lanthanide MOFs: a tunable luminescence and ratiometric luminescent probe for sulfamethazine

“…32 150 cm −1 ) is too high to accept energy from the ligand H 4 L, its characteristic 4f → 4f transition is not observed at 311 nm. 41,52 2 shows a maximum blue emission at 393 nm ( λ ex = 285 nm), which corresponds to the emission of H 4 L (Fig. 3b).…”

“…Therefore, multiple Ln 3+ ions can be introduced into the same MOFs, and the proportion of Ln 3+ ions in Ln-MOFs can be varied by adjusting the stoichiometry of different Ln 3+ ions, further achieving the regulation of the emission color of doped Ln-MOFs. [40][41][42] Meanwhile, the emission colors of Ln-MOFs are invisible in sunlight and visible under specific wavelength UV-light irradiation, which makes them important anti-counterfeiting materials. 27,[43][44][45] Most of the reported Ln-MOFs have good luminescence and stability in the solid state, but their stability in water is relatively weak, which limits their further application.…”

“…[47][48][49] Second, emissions of the Ln 3+ ions are extremely weak due to the low molar absorptivity and Laporte forbidden f-f electronic transitions. 41 Then, the organic aromatic ligands containing π-electron conjugation systems can serve as "antenna" or sensitizers, effectively transferring absorbed energy to Ln 3+ ions through "antenna effects" and enhancing the luminescence of Ln-MOFs. Third, due to the strong coordination abilities of −PO 3 H 2 groups, metal phosphonates can show higher thermal and chemical stabilities than other types of MOFs.…”

Highly stable lanthanide cluster-based luminescent materials constructed from β-diketone to 1,10-phenanthroline exhibiting ultrahigh photoluminescence and efficient pesticide detection

“…20,21 The energy gap between the triplet excited states of β-diketonates or 10-phenanthroline and the lowest excited states of Ln 3+ ions perfectly matches the requirement for energy transfer from organic ligands to Ln 3+ ions, thus effectively sensitizing Ln 3+ ions and improving the luminescence quantum yield. 22,23 The content of organic chromophores in the structure will directly influence the luminescence quantum yield. Ln 3+ ions feature high coordination number and rich coordination configuration, which can be chelated with various organic luminescent ligands to form luminescent lanthanide clusters with high ratio of ligands to metal atoms.…”