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

Biao Wu; Jianjun Liang; Yuxin Zhao; Minrui Li; Shaoguang Li; Yanyan Liu; Yongping Zhang; Xiao Juan Yang

doi:10.1039/b920777e

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

Biao Wu^*, Jianjun Liang, Yuxin Zhao, Minrui Li, Shaoguang Li, Yanyan Liu, Yongping Zhang, Xiao Juan Yang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

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]SO ₄·2H₂O}_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.

Original language	English
Pages (from-to)	2129-2134
Number of pages	6
Journal	CrystEngComm
Volume	12
Issue number	7
DOIs	https://doi.org/10.1039/b920777e
Publication status	Published - Jul 2010
Externally published	Yes

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title = "Sulfate encapsulation in three-fold interpenetrated metal-organic frameworks with bis(pyridylurea) ligands",

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]SO 4·2H2O}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.",

author = "Biao Wu and Jianjun Liang and Yuxin Zhao and Minrui Li and Shaoguang Li and Yanyan Liu and Yongping Zhang and Yang, {Xiao Juan}",

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language = "English",

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AU - Wu, Biao

AU - Liang, Jianjun

AU - Zhao, Yuxin

AU - Li, Minrui

AU - Li, Shaoguang

AU - Liu, Yanyan

AU - Zhang, Yongping

AU - Yang, Xiao Juan

PY - 2010/7

Y1 - 2010/7

N2 - 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]SO 4·2H2O}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.

AB - 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]SO 4·2H2O}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.

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DO - 10.1039/b920777e

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SN - 1466-8033

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ER -

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

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