Issue 7, 2010
From the journal:

CrystEngComm

Sulfate encapsulation in three-fold interpenetrated metal–organic frameworks with bis(pyridylurea) ligands†

Biao Wu,*ab   Jianjun Liang,a   Yuxin Zhao,b   Minrui Li,ac   Shaoguang Li,ac   Yanyan Liu,ac   Yongping Zhangb  and  Xiao-Juan Yangab  

* Corresponding authors

a State Key Laboratory for Oxo Synthesis & Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China
E-mail: wubiao@lzb.ac.cn
Fax: +86 931 4968286

b State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, China

c Graduate School of Chinese Academy of Sciences, Beijing, China

Abstract

Self-assembly of two flexible bis-pyridylurea ligands, pentane-1,5-diylbis(3-pyridin-3-ylurea) (L5) and hexane-1,6-diylbis(3-pyridin-3-ylurea) (L6) with ZnSO4 or CdSO4 (metal-to-ligand molar ratio 1 : 2) results in three metal–organic frameworks with (4,4) net structures, {[ML2(H2O)2]SO4·2H2O}n (1: Zn, L5; 2: Cd, L5; and 3: Zn, L6). Single-crystal X-ray diffraction analyses reveal that all the compounds are characteristic of a 3-fold parallel interpenetrated framework with cavities suitable for encapsulating the sulfate anion despite the different spacer lengths ((CH2)5 and (CH2)6) of the two ligands and variation of the metal ions. The ligand adopts an anti–anti conformation and functions as a bridging bidentate linker, while the sulfate ion is selectively bound by four urea functionalities via multiple hydrogen bonds.

Graphical abstract: Sulfate encapsulation in three-fold interpenetrated metal–organic frameworks with bis(pyridylurea) ligands

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Article information

DOI
https://doi.org/10.1039/B920777E
Article type
Paper
Submitted
05 Oct 2009
Accepted
26 Jan 2010
First published
24 Feb 2010

CrystEngComm, 2010,12, 2129-2134

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Sulfate encapsulation in three-fold interpenetrated metal–organic frameworks with bis(pyridylurea) ligands

B. Wu, J. Liang, Y. Zhao, M. Li, S. Li, Y. Liu, Y. Zhang and X. Yang, CrystEngComm, 2010, 12, 2129 DOI: 10.1039/B920777E

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