title: Face-Capped M(4) L4 Tetrahedral Metal-Organic Cage: Iodine Capture and Release, Ion Exchange, and Electrical Conductivity.
abstract: An M(4) L4 type metal-organic cage (MOC-19) has been synthesized from the one-pot reaction of tri(pyridinylmethylene)phenylbenzeneamine (TPBA) with hydrated Zn(ClO4 )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 I2 ) but also in solution (for I2 and I3 (-) ), and anion-exchange experiments indicate the capacity to extract IO3 (-) anions from aqueous solution. Enrichment of iodine species from KI/I2 aqueous solution proceeds facilely, revealing a pseudo-second-order kinetics of I3 (-) adsorption. Furthermore, the electrical conductivity of MOC-19 single crystals could be significantly altered by I2 inclusion.
authors.affiliation: Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, China.|Karlsruher Institut für Technologie (KIT), Institut für Anorganische Chemie, 76131, Karlsruhe, Germany.
authors.forename: Wei-Qin
authors.initials: WQ
authors.lastname: Xu
authors.affiliation: Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, China.
authors.forename: Yu-Hao
authors.initials: YH
authors.lastname: Li
authors.affiliation: Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, China.
authors.forename: Hai-Ping
authors.initials: HP
authors.lastname: Wang
authors.affiliation: Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, China. jiangji@mail.sysu.edu.cn.
authors.forename: Ji-Jun
authors.initials: JJ
authors.lastname: Jiang
authors.affiliation: Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, China.|Karlsruher Institut für Technologie (KIT), Institut für Anorganische Chemie, 76131, Karlsruhe, Germany.
authors.forename: Dieter
authors.initials: D
authors.lastname: Fenske
authors.affiliation: Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, China. cesscy@mail.sysu.edu.cn.|State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China. cesscy@mail.sysu.edu.cn.
authors.forename: Cheng-Yong
authors.initials: CY
authors.lastname: Su
keywords: cage compounds; conductivity; iodine capture; ion exchange; metal-organic cages