5 years ago

Stepwise Construction of Self-Assembled Heterometallic Cages Showing High Proton Conductivity

Stepwise Construction of Self-Assembled Heterometallic Cages Showing High Proton Conductivity
Aninda Jiban Bhattacharyya, Rupak Saha, Partha Sarathi Mukherjee, Dipak Samanta
Two neutral tripodal metalloligands (CoL and FeL where L=C18H21N10) containing a clathrochelate core were synthesized and characterized in one-step. Reactions of these ligands with three different metal acceptors cis-(tmen)Pd(NO3)2 (tmen =tetramethylethylenediamine), Zn(NO3)2 and Mn(ClO4)2 separately yielded a series of heterometallic coordination cages (1 a–3 a and 1 b-3 b) in high yields. Depending on the nature of coordination geometry of the acceptors, the resulting assemblies have trigonal- bipyramidal (1 a/1 b), open-cubic (2 a/2 b), and closed-cubic structures (3 a/3 b). The structures of the complexes 1 a, 2 a, 2 b, 3 a, and 3 b were confirmed by single-crystal X-ray diffraction studies. Analysis of crystal packing of the complexes 3 a and 3 b revealed the presence of several coordinated and lattice water molecules in the intermolecular channels. Both these complexes (3 a and 3 b) showed very high water adsorption under humid conditions. In addition, 3 a and 3 b exhibited promising proton conductivity of 3.31×10−3 and 1.05×10−4 S cm−1 at 70 °C under 98 % relative humidity (RH) respectively, with activation energy of 1.00–0.78 eV. Complex cages: A series of discrete self-assembled heterometallic cages was synthesized in stepwise manner. Two of them showed high proton conductivity at a wide temperature range under different humid conditions.

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

DOI: 10.1002/chem.201701596

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.