title: Shape-Asymmetry Supramolecular Isomerism in Asymmetrical Ligand PCPs and the Expression Method of Three-Level Isomerism.
abstract: We show here the supramolecular isomerism, with respect to shape-asymmetry of ligand and the new hierarchical classification for supramolecular isomerism, the three-level isomerism, which was advanced based on a thorough investigation for the four new Ni/dpt24 polymorphs [Hdpt24 = 3-(2-pyridyl)-5-(4-pyridyl)-1,2,4-triazole)]. Compounds 1, 2, and 3 are three-dimensional twofold interpenetrated porous coordination polymers with NbO topology, while 4 with two-dimensional grid structure is termed as the primary isomer of 1/2/3 due to the difference of dimensionality. Complex 3 possessing different shape-asymmetry of single networks from 1 and 2, is called as the secondary isomer of 1 and 2. Complexes 1 and 2 possess the same topology, single shape-asymmetry networks, but different interpenetration-orientation and interpenetration-asymmetry, and are defined as the tertiary isomers. Distinct differences in H2 and CO2 adsorption capacity were observed among each level of isomers. In addition, the hierarchical classification's relationship with characteristic classifications has been discussed.
authors.affiliation: Department of Chemistry, Virginia Commonwealth University , Richmond, Virginia 23284, United States.
authors.forename: Xiaonan
authors.initials: X
authors.lastname: Gao
authors.affiliation: Materials Chemistry Research Centre, Dezhou University , Dezhou 253023, Shandong, P. R. China.
authors.forename: Ai-Yun
authors.initials: AY
authors.lastname: Fu
authors.affiliation: Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Material Sciences, Northwest University , Xi'an 710069, P. R. China.
authors.forename: Yao-Yu
authors.initials: YY
authors.lastname: Wang