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Lanthanide coordination polymers (Ln-CPs) have attracted explosive attention as an emerging type of multifunctional materials in the last decades. The establishment of the permanent porosity within Ln-CPs has enabled them to be a new class of materials for gas adsorption and separation. The unique luminescent properties, tunable emission colors, and various NIR emitting of luminescent Ln-CPs feature them as promising materials for solid-state light (SSL) applications in display devices, sensing and white-light emitting. Taking advantages of collaborative permanent porosities and unique luminescent properties, Ln-CPs are superior to other types of materials for their applications in luminescent chemical sensing, biomedical imaging as well as drug delivery monitoring and treatment. In this review, we focus on recent significant advances on this active research field and provide a comprehensive review on multifunctional Ln-CPs materials for gas adsorption and separation, tunable luminescence, chemical sensing, catalysis, and biomedical applications. [ABSTRACT FROM AUTHOR]

SnO 2 -based nanostructures have been extensively studied as excellent hydrogen sensing materials. While Pd loading was employed to enhance sensing performance, many reported that Pd-loaded SnO 2 (denoted as Pd/SnO 2) experienced signal saturation at high H 2 concentration, limiting the detection range and leaving the sensing mechanism unclear. Herein, we report a Pd/SnO 2 nanoparticle (NP) film-based H 2 sensor fabricated using gas-phase cluster beam deposition, achieving wide-concentration-range hydrogen detection (1.5 ppm - 10%). It was found that there are two H 2 concentration-dependent sensing mechanisms. Below 1% H 2 concentration, the response correlated linearly with the square root of the H 2 concentration, predominantly due to the electronic coupling effect at the interface between palladium hydride (PdH x) and SnO 2 , realizing a high sensitivity of 0.23 ppm−1. As concentration increased further, a linear dependence between the response and H 2 concentration was observed with a sensitivity of 0.018 ppm−1, which stemmed from the redox reaction between H atoms and O α − on the SnO 2 surface. Additionally, the device's sensing kinetics were meticulously analyzed. Pd loading drastically reduced the response time by reducing apparent activation energy. Furthermore, our sensor exhibited notable selectivity, reproducibility, and long-term stability. [Display omitted] • Pd/SnO 2 NP film-based H 2 sensor fabricated via gas-phase cluster beam deposition. • The sensor exhibits excellent sensitivity across 1.5 ppm – 10% H 2 concentration. • It was found that there are two H 2 concentration-dependent sensing mechanisms. • The sensing kinetics were meticulously analyzed. [ABSTRACT FROM AUTHOR]