A Porous π-Stacked Self-Assembly of Cup-Shaped Palladium Complex for Iodine Capture

Lin-Lin Li; Min Huang; Ting Chen; Xiao-Feng Xu; Zhu Zhuo; Wei Wang; You-Gui Huang

doi:10.3390/molecules28072881

A Porous π-Stacked Self-Assembly of Cup-Shaped Palladium Complex for Iodine Capture

Molecules. 2023 Mar 23;28(7):2881. doi: 10.3390/molecules28072881.

Authors

Lin-Lin Li^{1

2

3}, Min Huang^{2

3

4}, Ting Chen^{2

3

4}, Xiao-Feng Xu^{2

3}, Zhu Zhuo^{2

3}, Wei Wang^{2

3}, You-Gui Huang^{2

3

5}

Affiliations

¹ College of Chemistry, Fuzhou University, Fuzhou 350108, China.
² CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China.
³ Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, China.
⁴ College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350002, China.
⁵ Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, China.

Abstract

Acquiring adsorbents capable of effective radioiodine capture is important for nuclear waste treatment; however, it remains a challenge to develop porous materials with high and reversible iodine capture. Herein, we report a porous self-assembly constructed by a cup-shaped Pd^II complex through intermolecular π···π interactions. This self-assembly features a cubic structure with channels along all three Cartesian coordinates, which enables it to efficiently capture iodine with an adsorption capacity of 0.60 g g^-1 for dissolved iodine and 1.81 g g^-1 for iodine vapor. Furthermore, the iodine adsorbed within the channels can be readily released upon immersing the bound solid in CH₂Cl₂, which allows the recycling of the adsorbent. This work develops a new porous molecular material promising for practical iodine adsorption.

Keywords: cup-shaped; iodine; nuclear waste; porous; π···π stacking.

Grants and funding

This research was funded by the National Natural Science Found (NNSF) of China (92261109 and 21901242), the NSF of Fujian Province (2020J05080), the NSF of Xiamen (3502Z20206080), the Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China (2021ZR110), the Recruitment Program of Global Youth Experts, and the Youth Innovation Promotion Association.