Photoluminescent Metal–Organic Frameworks for Gas Sensing

• Published in: Advanced science Vol. 3; no. 7; pp. 1500434 - n/a
• Main Authors: Lin, Rui‐Biao, Liu, Si‐Yang, Ye, Jia‐Wen, Li, Xu‐Yu, Zhang, Jie‐Peng
• Format: Journal Article
• Language: English
• Published: Germany John Wiley & Sons, Inc 01.07.2016; John Wiley and Sons Inc
• Subjects: Catalysis; Flexibility; gas; Gases; Ligands; luminescence; porous coordination polymer; Review; Reviews; sensor; Thin films; vapor; gas; porous coordination polymer; sensor; luminescence; vapor
• ISSN: 2198-3844; 2198-3844
• DOI: 10.1002/advs.201500434

Luminescence of porous coordination polymers (PCPs) or metal–organic frameworks (MOFs) is sensitive to the type and concentration of chemical species in the surrounding environment, because these materials combine the advantages of the highly regular porous structures and various luminescence mechanisms, as well as diversified host‐guest interactions. In the past few years, luminescent MOFs have attracted more and more attention for chemical sensing of gas‐phase analytes, including common gases and vapors of solids/liquids. While liquid‐phase and gas‐phase luminescence sensing by MOFs share similar mechanisms such as host‐guest electron and/or energy transfer, exiplex formation, and guest‐perturbing of excited‐state energy level and radiation pathways, via various types of host‐guest interactions, gas‐phase sensing has its unique advantages and challenges, such as easy utilization of encapsulated guest luminophores and difficulty for accurate measurement of the intensity change. This review summarizes recent progresses by using luminescent MOFs as reusable sensing materials for detection of gases and vapors of solids/liquids especially for O2, highlighting various strategies for improving the sensitivity, selectivity, stability, and accuracy, reducing the materials cost, and developing related devices. Luminescent metal–organic frameworks are promising for chemical sensing. Compared with liquid‐phase sensing, gas‐phase sensing has its unique advantages and challenges. This review summarizes recent representative works on luminescent MOFs for non‐destructive detection of gas‐phase analytes.