An Extra-Large-Pore Pure Silica Zeolite with 16×8×8-Membered Ring Pore Channels Synthesized using an Aromatic Organic Directing Agent

Wen-Wen Zi; Zihao Gao; Jun Zhang; Bao-Xun Zhao; Xian-Shu Cai; Hong-Bin Du; Fei-Jian Chen

doi:10.1002/anie.201915232

An Extra-Large-Pore Pure Silica Zeolite with 16×8×8-Membered Ring Pore Channels Synthesized using an Aromatic Organic Directing Agent

Angew Chem Int Ed Engl. 2020 Mar 2;59(10):3948-3951. doi: 10.1002/anie.201915232. Epub 2020 Jan 28.

Authors

Wen-Wen Zi¹, Zihao Gao¹, Jun Zhang², Bao-Xun Zhao¹, Xian-Shu Cai¹, Hong-Bin Du¹, Fei-Jian Chen³

Affiliations

¹ State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China.
² School of Materials and Chemistry Engineering, Anhui Jianzhu University, Hefei, 230601, China.
³ Department of Chemistry, Bengbu Medical College, Bengbu, 233030, China.

PMID: 31891207
DOI: 10.1002/anie.201915232

Abstract

Extra-large-pore zeolites for processing large molecules have long been sought after by both the academia and industry. However, the synthesis of these materials, particularly extra-large-pore pure silica zeolites, remains a big challenge. Herein we report the synthesis of a new extra-large-pore silica zeolite, designated NUD-6, by using an easily synthesized aromatic organic cation as structure-directing agent. NUD-6 possesses an intersecting 16×8×8-membered ring pore channel system constructed by four-connected (Q⁴ ) and unusual three-connected (Q³ ) silicon species. The organic cations in NUD-6 can be removed in nitric acid to yield a porous material with high surface area and pore volume. The synthesis of NUD-6 presents a feasible means to prepare extra-large pore silica zeolites by using assembled aromatic organic cations as structure-directing agents.

Keywords: extra-large pores; silica; structure-directing agents; templated; zeolites.

Abstract

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