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Exceptional Iodine Capture in 2D Covalent Organic Frameworks
Author(s) -
Wang Ping,
Xu Qing,
Li Zhongping,
Jiang Weiming,
Jiang Qiuhong,
Jiang Donglin
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201801991
Subject(s) - materials science , iodine , radioactive iodine , covalent bond , mesoporous material , porosity , nanotechnology , tetragonal crystal system , diamondoid , chemistry , organic chemistry , molecule , crystal structure , medicine , thyroid , metallurgy , composite material , catalysis
Progress in chemistry over the past four decades has generated a variety of porous materials for removing iodine—a radioactive emission accompanying nuclear fission. However, most studies are still based on the notion that entangled pores together with specific binding sites are essential for iodine capture. Here, an unraveled physical picture of iodine capture that overturns the preconception by exploring 1D channeled porous materials is disclosed. 2D covalent organic frameworks are constructed in a way so that they are free of interpenetration and binding sites but consist of 1D open channels. As verified with different channels shaping from hexagonal to tetragonal and trigonal and ranging from micropores to mesopores, all the 1D channels enable a full access to iodine, generalizing a new paradigm that the pore volume determines the uptake capacity. These results are of fundamental importance to understanding iodine uptake and designing materials to treat coagulative toxic vapors.