5 years ago

Highly Water-Stable Lanthanide–Oxalate MOFs with Remarkable Proton Conductivity and Tunable Luminescence

Highly Water-Stable Lanthanide–Oxalate MOFs with Remarkable Proton Conductivity and Tunable Luminescence
Juan Xie, Kun Zhang, Hongyu Li, Haiquan Su, Ling Huang, Quli Fan, Li Nie, Jiaxin Gao, Xiaoji Xie, Wei Huang, Wenlong Liu, Dan Tian, Yue Pan
Although proton conductors derived from metal–organic frameworks (MOFs) are highly anticipated for various applications including solid-state electrolytes, H2 sensors, and ammonia synthesis, they are facing serious challenges such as poor water stability, fastidious working conditions, and low proton conductivity. Herein, we report two lanthanide–oxalate MOFs that are highly water stable, with so far the highest room-temperature proton conductivity (3.42 × 10−3 S cm−1) under 100% relative humidity (RH) among lanthanide-based MOFs and, most importantly, luminescent. Moreover, the simultaneous response of both the proton conductivity and luminescence intensity to RH allows the linkage of proton conductivity with luminescence intensity. This way, the electric signal of proton conductivity variation versus RH will be readily translated to optical signal of luminescence intensity, which can be directly visualized by the naked eye. If proper lanthanide ions or even transition-metal ions are used, the working wavelengths of luminescence emissions can be further extended from visible to near infrared light for even wider-range applications. Highly water-stable lanthanide–oxalate metal–organic frameworks with remarkable proton conductivity and tunable luminescence are synthesized, where not only the relationships of proton conductivity versus relative humidity, and luminescence intensity versus relative humidity can be obtained, but the indirect relationship of proton conductivity versus luminescence intensity can also be plotted. This allows the direct monitoring of proton conductivity variations by the naked eye.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/adma.201701804

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.