Details

Autor(en) / Beteiligte

• Zhu, Minghui
• Iwano, Tsukasa
• Tan, Mengjin
• Akutsu, Daiki
• Uchida, Sayaka
• Chen, Guanying
• Fang, Xikui

Titel

Macrocyclic Polyoxometalates: Selective Polyanion Binding and Ultrahigh Proton Conduction

Ist Teil von

• Angewandte Chemie International Edition, 2022-04, Vol.61 (15), p.e202200666-n/a

Auflage

International ed. in English

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The rational development of an anion templation strategy for the construction of macrocycles has been historically limited to small anions, but large polyoxoanions can offer unmatched structural diversity and ample binding sites. Here we report the formation of a {Mo22Fe8} macrocycle by using the Preyssler anion, [NaP5W30O110]14− ({P5W30}), as a supramolecular template. The {Mo22Fe8} macrocycle displays selective anion binding behavior in solution. In the solid state, the 1 : 2 host–guest complex, {P5W30}2⊂{Mo22Fe8}, transports protons more effectively, through an extended hydrogen‐bonding network, than a related 1 : 1 complex where the guest is completely encapsulated. The results highlight the great potential this anion templation approach has in producing macrocyclic systems for selective anion recognition and proton conduction purposes. Anion templation using polyoxometalates can be a very effective approach to construct large macrocycles that have unique solid‐state and solution properties. The {Mo22Fe8} macrocycle selectively binds the Preyssler polyanion in solution. It forms a 1 : 2 host–guest complex that shows ultrahigh solid‐state proton conductivities (1.7×10−2 S cm−1 at 368 K and 90 % RH) thanks to the presence of an extended hydrogen bonding network.