Accumulation of versatile iodine species by a porous hydrogen-bonding Cu(II) coordination framework

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Accumulation of versatile iodine species by a porous hydrogen-bonding Cu(ii) coordination framework†

Lei Fu,^a Yu Liu,^a Mei Pan,*^ab Xiao-Jun Kuang,^a Cheng Yan,^a Kang Li,^a Shi-Chao Wei^a and Cheng-Yong Su*^a

Author affiliations

* Corresponding authors

^a MOE Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
E-mail: panm@mail.sysu.edu.cn, cesscy@mail.sysu.edu.cn
Fax: +86 20-8411-5178

^b State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China

Abstract

A microporous coordination framework formed by hydrogen-bonding directed assembly of Cu(II) hexanuclear rings can act as a host for iodine accumulation in an aqueous solution. Various iodine species, I⁻, I₃⁻ or I₂, are able to be trapped in the hydrophilic voids of the crystals via a single-crystal-to-single-crystal ion-exchange process. The chemical nature of the iodine species encapsulated inside the coordination framework have been established by single crystal and powder XRD, IR, XPS, EA, TG and iodometric methods. Furthermore, the accumulated iodine species can be easily extracted from the crystals by organic solvents. The kinetics of I₃⁻ release from the crystals by extraction with ethanol has been studied.

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Article information

DOI: https://doi.org/10.1039/C3TA11157A
Article type: Paper
Submitted: 21 Mar 2013
Accepted: 09 May 2013
First published: 10 May 2013

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J. Mater. Chem. A, 2013,1, 8575-8580

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