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Stimuli-responsive light-emitting materials are of great interest owing to their potential use in encryption and multilevel security. In this context, herein, the synthesis of light-emitting multifunctional coordination polymer gels (CPGs) was accomplished by the self-assembly of europium and terbium acetate with a bifunctional (amide/carboxylic acid) gelator. The assynthesized luminescent CPGs are stable up to 300 °C. The FESEM micrograph exhibits pebble-like morphology, and the TEM images reveal a sheet-like structure which is grown on top of each other. The optical properties of the as-synthesized CPGs are readily tuneable over a broad spectrum, including white-light emission, simply by modulating the europium and terbium ion stoichiometry. The as-synthesized luminescent materials have the potential to be used as invisible security inks for high-security information encoding. Additionally, water-resistant luminescent thin films were fabricated by incorporating Eu@BTT or Tb@BTT (BTT: 5,5′,5″-((benzene-1,3,5tricarbonyl)tris(azanediyl))triisophthalic acid) into the poly(methyl methacrylate) (PMMA) polymer matrix for the naked eye test of nitro-explosive compounds (2,4,6-trinitrophenol and nitrophenol). The sensing mechanism is proposed based on the DFT and time-resolved photoluminescence studies.

Nature creates definite architecture with fluorescence capabilities and superior visual adaptation in many organisms e.g., cephalopods, which differentiated them from the surrounding in the context of colour and texture that...

Fluorescence‐based detection technique using coordination polymer has been considered an attractive alternative over conventional approaches. Herein, a new luminescent zinc(II) coordination polymer, [Zn(4‐ABPT)(NIPA)(H2O)], SSICG‐5, is synthesized by using a Lewis acidic Zn(II) ion, aromatic nitro group containing ligand 5‐nitroisophthalic acid (H2NIPA), and basic −NH2 rich ligand 3,5‐di(pyridine‐4‐yl)‐4H‐1,2,4‐triazol‐4‐amine (4‐ABPT). SSICG‐5 can detect Fe3+ and Cr2O72− selectively with a LOD of 0.16 μM and 1.94 μM, respectively. Additionally, carbon dioxide (CO2) fixation via one‐pot CO2 cycloaddition reaction has significant importance for reduced waste formation, minimizing reaction time and lowering chemical usage. Zn metal centre of SSICG‐5 possesses a replaceable coordinated water molecule. The active metal sites combined with the Lewis acidic and basic sites of the ligands make SSICG‐5 an ideal bifunctional heterogeneous catalyst for efficient CO2 cycloaddition reaction under room temperature (RT), solvent‐free conditions. Notably, SSICG‐5 exhibits near quantitative conversion (turnover number (TON) of 198) of propylene oxide to its carbonate compound under mild reaction conditions.