PEG-Induced Synthesis of Coordination-Polymer Isomers with Tunable Architectures and Iodine Capture

Si-Si Zhao; Li Chen; Xiaohua Zheng; Lei Wang; Zhigang Xie

doi:10.1002/asia.201700018

PEG-Induced Synthesis of Coordination-Polymer Isomers with Tunable Architectures and Iodine Capture

Chem Asian J. 2017 Mar 2;12(5):615-620. doi: 10.1002/asia.201700018. Epub 2017 Feb 3.

Authors

Si-Si Zhao¹, Li Chen¹, Xiaohua Zheng^{2

3}, Lei Wang², Zhigang Xie²

Affiliations

¹ Department of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China.
² State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China.
³ The University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.

PMID: 28093880
DOI: 10.1002/asia.201700018

Abstract

Controllable synthesis of coordination polymer (CP) isomers and revealing their structure-property relationships remain enormous challenges. Three new supramolecular isomers have been synthesized by tuning the poly(ethylene glycol) (PEG) content in the feed. These supramolecular isomers have the same framework formula of [Cu₂ I₂ (tppe)] and different architectures from the classical 2D stacking framework to a 3D entangled system with the coexistence of interpenetration and polycatenation, and a 3D topological framework. Interestingly, these CPs could be utilized for capturing iodine molecules. According to multiple complementary experiments and crystallographic analyses, iodine capture is mainly based on halogen-bond interactions in the inorganic {Cu₂ I₂ } building blocks of the framework. The present study describes a structure-property relationship in supramolecular isomerism with distinct topological structures.

Keywords: coordination polymers; iodine capture; metal-organic frameworks; structure-property relationships; supramolecular isomers.