Self-Assembly of Giant Mo240 Hollow Opening Dodecahedra

Jiaomin Lin; Ning Li; Shiping Yang; Mingjie Jia; Jiang Liu; Xiao-Min Li; Lu An; Qiwei Tian; Long-Zhang Dong; Ya-Qian Lan

doi:10.1021/jacs.0c06582

Self-Assembly of Giant Mo₂₄₀ Hollow Opening Dodecahedra

J Am Chem Soc. 2020 Aug 12;142(32):13982-13988. doi: 10.1021/jacs.0c06582. Epub 2020 Aug 3.

Authors

Jiaomin Lin¹, Ning Li^{2

3}, Shiping Yang¹, Mingjie Jia¹, Jiang Liu⁴, Xiao-Min Li⁴, Lu An¹, Qiwei Tian¹, Long-Zhang Dong⁴, Ya-Qian Lan^{2

4}

Affiliations

¹ The Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, P. R. China.
² School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China.
³ School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, P. R. China.
⁴ Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China.

PMID: 32692553
DOI: 10.1021/jacs.0c06582

Abstract

The synthesis of hollow opening polyhedral cages has always been an attractive but challenging goal, especially with regard to inorganic polyhedral cages. Herein, we present a novel, 240-nuclearity giant polymolybdate cage prepared via hydrothermal synthesis. This cage is composed of 20 tripod-shaped [Mo₆O₂₂(SO₃)]^n-/[Mo₆O₂₁(SO₄)]^n- building blocks with three connected vertices and 30 cubane-type [Mo₄O₁₆]^n- edge building blocks, featuring a rare, nearly regular pentagonal dodecahedron with a large inner cavity (diameter up to 1.8 nm) and 12 opening pentagonal windows. This is the highest nuclearity hollow opening dodecahedral cage reported to date. Importantly, this cage exhibits good stability in solution, as revealed by scanning transmission electron microscopy (STEM), TEM, UV-vis, and Raman spectra. In addition, the bulk sample of this compound exhibits an ultrahigh proton conductivity of 1.03 × 10^-1 S cm^-1 at 80 °C and 98% relative humidity, which is the highest among polyoxometalate-based crystalline proton conductors.