title: Aromatic Substituent Effects on the Flexibility of Metal-Organic Frameworks.
abstract: The flexibility (or breathing behavior) of zinc-based metal-organic frameworks (MOFs) has been manipulated by regioisomeric and positional control of organic functionalities. Ten new regioisomeric BDC (ortho- or para-disubstituted benzene-1,4-dicarboxylic acid) ligands have been synthesized and applied to a DMOF (dabco MOF) system, which has a zinc(II) paddle-wheel SBU (secondary building unit). Among the new regioisomeric MOFs, the NH2-OMe combination showed significant flexibility (breathing behavior) changes by simply altering the functional group positions (from 2,3 to 2,5). The electronic density of the benzene ring was considered to be a major factor in the flexibility changes in the regioisomeric MOF system.
authors.affiliation: Department of Chemistry and BK21Plus Research Team, Chungbuk National University , Cheongju 28644, Republic of Korea.
authors.forename: Hyungwoo
authors.initials: H
authors.lastname: Hahm
authors.affiliation: Department of Chemistry and BK21Plus Research Team, Chungbuk National University , Cheongju 28644, Republic of Korea.
authors.forename: Kwangho
authors.initials: K
authors.lastname: Yoo
authors.affiliation: Department of Chemistry and BK21Plus Research Team, Chungbuk National University , Cheongju 28644, Republic of Korea.
authors.forename: Hyeonbin
authors.initials: H
authors.lastname: Ha
authors.affiliation: Department of Chemistry and BK21Plus Research Team, Chungbuk National University , Cheongju 28644, Republic of Korea.
authors.forename: Min
authors.initials: M
authors.lastname: Kim