Two new MOFs (CuMOF-1 and CoMOF-2) are synthesized, characterized by spectral and magnetic studies and employed for selective dye adsorption properties.

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A novel discrete Na{Cu12Zn4} unit is discovered with the ability to sense calcium ions (with ultra-low detection limit) as well as to adsorb cationic dyes in the aqueous phase with high performance.

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Oxygen is essential for life. Inspired by the importance of oxygen, we present this critical and current review on lanthanide-based oxygen sensors.