title: Phase Transformation, Exceptional Quenching Efficiency, and Discriminative Recognition of Nitroaromatic Analytes in Hydrophobic, Nonporous Zn(II) Coordination Frameworks.
abstract: Five-fold interpenetrated Zn(II) frameworks (1 and 2) have been prepared, and an irreversible phase transformation from 1 to 2 is found to occur through a dissolution-recrystallization process. Compound 1 exhibits the highest quenching efficiency (>96%) for nitrobenzene at 7 ppm among luminescent coordination polymers. Selective discrimination of nitroaromatic molecules including o-nitrophenol (o-NP), p-nitrophenol (p-NP), 2,4-dinitrophenol (DNP), and 2,4,6-trinitrophenol (TNP) is realized in 1 and 2 as a result of the fact that the framework-analyte interaction affords characteristic emission signals. This observation is the first case of a nonporous coordination framework for such discriminative detection. Notably, significant hydrophobicity is evident in the framework 1 because of its surface roughness, which accounts for the enhanced quenching ability.
authors.affiliation: Department of Chemistry, Research Institute for Natural Sciences, Korea University , Seoul 136-713, Korea.
authors.forename: Jeong Hwa
authors.initials: JH
authors.lastname: Song
authors.affiliation: Department of Chemistry, Research Institute for Natural Sciences, Korea University , Seoul 136-713, Korea.
authors.forename: Yeonga
authors.initials: Y
authors.lastname: Kim
authors.affiliation: Department of Chemistry, Research Institute for Natural Sciences, Korea University , Seoul 136-713, Korea.
authors.forename: Kwang Soo
authors.initials: KS
authors.lastname: Lim
authors.affiliation: Department of Chemistry, Research Institute for Natural Sciences, Korea University , Seoul 136-713, Korea.
authors.forename: Dong Won
authors.initials: DW
authors.lastname: Kang
authors.affiliation: Department of Chemistry, Research Institute for Natural Sciences, Korea University , Seoul 136-713, Korea.
authors.forename: Woo Ram
authors.initials: WR
authors.lastname: Lee
authors.affiliation: Department of Chemistry, Research Institute for Natural Sciences, Korea University , Seoul 136-713, Korea.
authors.forename: Chang Seop
authors.identifier: http://orcid.org/0000-0002-4329-4745
authors.initials: CS
authors.lastname: Hong