Issue 47, 2013
From the journal:

Dalton Transactions

Toluene-assisted synthesis of RHO-type zeolitic imidazolate frameworks: synthesis and formation mechanism of ZIF-11 and ZIF-12†

Ming He,ab   Jianfeng Yao,*b   Qi Liu,b   Zhaoxiang Zhongb  and  Huanting Wang*b  

* Corresponding authors

a College of Science, Nanjing Forestry University, Jiangsu 210037, China

b Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia
E-mail: jianfeng.yao@monash.edu, huanting.wang@monash.edu
Fax: +61 3 9905 5686
Tel: +61 3 9905 9621

Abstract

Toluene was discovered as the structure template for the synthesis of large-cage RHO-type zeolitic imidazolate frameworks (ZIF-11 and ZIF-12) in an alcohol-based solution where benzimidazole–toluene interactions play a decisive structure-directing role; otherwise it leads to small-cage SOD-type ZIF-7 and ZIF-9 without toluene. The specific π–π interactions make toluene molecules adopt a specific and oriented arrangement in the unit cell. XRD intensity of the (100) plane is strongly dependent on the amount of toluene: apparent intensity degradation is observed after removing toluene by solvent exchange or thermal treatment, and the peak intensity is recoverable by filling of the pores with toluene vapor. More-polar methanol as compared to ethanol is favorable for the formation of RHO-type ZIFs due to the enhanced interactions between toluene and imidazolate linkers.

Graphical abstract: Toluene-assisted synthesis of RHO-type zeolitic imidazolate frameworks: synthesis and formation mechanism of ZIF-11 and ZIF-12

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Article information

DOI
https://doi.org/10.1039/C3DT52103F
Article type
Paper
Submitted
02 Aug 2013
Accepted
07 Sep 2013
First published
09 Sep 2013

Dalton Trans., 2013,42, 16608-16613

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Toluene-assisted synthesis of RHO-type zeolitic imidazolate frameworks: synthesis and formation mechanism of ZIF-11 and ZIF-12

M. He, J. Yao, Q. Liu, Z. Zhong and H. Wang, Dalton Trans., 2013, 42, 16608 DOI: 10.1039/C3DT52103F

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