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Face‐Capped M 4 L 4 Tetrahedral Metal–Organic Cage: Iodine Capture and Release, Ion Exchange, and Electrical Conductivity
Author(s) -
Xu WeiQin,
Li YuHao,
Wang HaiPing,
Jiang JiJun,
Fenske Dieter,
Su ChengYong
Publication year - 2016
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201501161
Subject(s) - iodine , aqueous solution , electrical resistivity and conductivity , chemistry , adsorption , ion , conductivity , ion exchange , metal , inorganic chemistry , crystallography , organic chemistry , electrical engineering , engineering
An M 4 L 4 type metal–organic cage (MOC‐19) has been synthesized from the one‐pot reaction of tri(pyridinylmethylene)phenylbenzeneamine (TPBA) with hydrated Zn(ClO 4 ) 2 under mild conditions and characterized by single‐crystal X‐Ray diffraction. Iodine capture studies show that the porous crystals of MOC‐19 exhibit a versatile behavior to accumulate iodine species not only in vapor (for I 2 ) but also in solution (for I 2 and I 3 − ), and anion‐exchange experiments indicate the capacity to extract IO 3 − anions from aqueous solution. Enrichment of iodine species from KI/I 2 aqueous solution proceeds facilely, revealing a pseudo‐second‐order kinetics of I 3 − adsorption. Furthermore, the electrical conductivity of MOC‐19 single crystals could be significantly altered by I 2 inclusion.