Volume 102, Issue 8 p. 4602-4611
ORIGINAL ARTICLE

Structural, electronic, and dielectric properties of a large random network model of amorphous zeolitic imidazolate frameworks and its analogues

Hailong Wang

Hailong Wang

State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, China

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Neng Li

Corresponding Author

Neng Li

State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, China

Correspondence

Neng Li, State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, China.

Email: [email protected]

and

Wai-Yim Ching, Department of Physics and Astronomy, University of Missouri – Kansas City, Kansas City, MO.

Email: [email protected]

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Zhongbo Hu

Zhongbo Hu

School of Information and Mathematics, Yangtze University, Jingzhou, Hubei, China

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Thomas D. Bennett

Thomas D. Bennett

Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, UK

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Xiujian Zhao

Xiujian Zhao

State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, China

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Wai-Yim Ching

Corresponding Author

Wai-Yim Ching

Department of Physics and Astronomy, University of Missouri-Kansas City, Kansas City, Missouri

Correspondence

Neng Li, State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, China.

Email: [email protected]

and

Wai-Yim Ching, Department of Physics and Astronomy, University of Missouri – Kansas City, Kansas City, MO.

Email: [email protected]

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First published: 10 January 2019
Citations: 13

Abstract

The amorphous zeolitic imidazolate frameworks (a-ZIFs) models and its analogues (with 918 or 810 atoms, respectively) are constructed based on a larger continuous random network (CRN) model of amorphous SiO2 (a-SiO2) model. The atomic, electronic, and dielectric properties of these structures, which possess different metal nodes and organic linkers, are investigated by well-defined density functional theory (DFT) calculations. The results suggest that all a-ZIFs have ultra-low dielectric constants and a large energy loss function (ELF), which suggests that they may be good candidates for electromagnetic absorptive materials. Most important, these a-ZIFs models offer a base-line model for other amorphous ZIFs for further research on models containing vacancies, defects, doping or under high pressure or high temperature.

CONFLICT OF INTEREST

The authors declare no conflict of interest.