A bis-bisurea receptor with the R,R-cyclohexane-1,2-diamino spacer for phosphate and sulfate ions

Meiying Wei; Biao Wu; Lei Zhao; Hui Zhang; Shaoguang Li; Yanxia Zhao; Xiao-Juan Yang

doi:10.1039/C2OB26591E

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Organic & Biomolecular Chemistry

Issue 44, 2012

The international home of synthetic, physical and biomolecular organic chemistry.

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A bis-bisurea receptor with the R,R-cyclohexane-1,2-diamino spacer for phosphate and sulfate ions

Meiying Wei,^a Biao Wu,*^b Lei Zhao,^c Hui Zhang,^c Shaoguang Li,^a Yanxia Zhao^a and Xiao-Juan Yang^a

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Corresponding authors

State Key Laboratory for Oxo Synthesis & Selective Oxidation, Lanzhou Institute of Chemical Physics, CAS, Lanzhou 730000, China

College of Chemistry and Materials Science, Northwest University, Xi'an, China
E-mail: wubiao@nwu.edu.cn

State Key Laboratory for Physical Chemistry of Solid Surfaces, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China

Org. Biomol. Chem., 2012,10, 8758-8761

DOI: 10.1039/C2OB26591E
Received 10 Aug 2012, Accepted 24 Sep 2012
First published online 10 Oct 2012

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Abstract
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A bis-bisurea receptor (L) based on the R,R-cyclohexane-1,2-diamino scaffold forms an uncommon 2:2 complex (1) with the monohydrogen phosphate ion (HPO₄²⁻) and a 1:1 complex (2) with the sulfate ion (SO₄²⁻). Solution binding properties of the two anions were studied by ¹H NMR, UV-vis, and circular dichroism (CD) methods.