Tuning the Dimensionality of Interpenetration in a Pair of Framework-Catenation Isomers To Achieve Selective Adsorption of CO<sub>2</sub> and Fluorescent Sensing of Metal Ions WangRongming ZhangMinghui LiuXiaobin ZhangLiangliang KangZixi WangWen WangXiaoqing DaiFangna SunDaofeng 2015 A pair of framework-catenation isomers (<b>UPC-19</b> and <b>UPC-20</b>) based on an anthracene-functionality dicarboxylate ligand were synthesized and characterized for the first time through tuning of the dimensionality of interpenetration. The interpenetration dimensionality significantly influences the properties including the porosity, gas-uptake capacity, and fluorescent sensing ability: <b>UPC-19</b> with 5-fold interpenetration is nonporous, whereas the 3-fold interpenetration form of <b>UPC-20</b> is porous and exhibits selective adsorption of CO<sub>2</sub> and fluorescent sensing of Cu<sup>2+</sup> and Fe<sup>3+</sup> through fluorescence quenching.