title: Deprotonation-triggered Stokes shift fluorescence of an unexpected basic-stable metal-organic framework.
abstract: A new three-dimensional porous metal-organic framework, JUC-119, constructed by a pyrene-based dendritic organic linker, H8TIAPy (H8TIAPy = 1,3,6,8-tetrakis(3,5-isophthalic acid)pyrene), and Eu(III) has been synthesized successfully. JUC-119 shows unexpected stability under a wide range of basic conditions from 0 to 0.01 M NaOH. Furthermore, with two carboxyl groups uncoordinated in each ligand, the crystals of JUC-119 show deprotonation-triggered Stokes shift fluorescence under basic conditions. As the concentration of base increases from 0 to 0.01 M NaOH, the luminescence emission of JUC-119 becomes gradually red shifted from 455 to 485 nm. In addition, the Stokes shift shows a good linear relationship to -log[OH(-)], which makes JUC-119 promising for base sensing.
authors.affiliation: State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry and ‡Department of Chemistry, Jilin University , Changchun 130012, China.
authors.forename: Nian
authors.initials: N
authors.lastname: Zhao
authors.forename: Fuxing
authors.initials: F
authors.lastname: Sun
authors.forename: Shixing
authors.initials: S
authors.lastname: Zhang
authors.forename: Hongming
authors.initials: H
authors.lastname: He
authors.forename: Jia
authors.initials: J
authors.lastname: Liu
authors.forename: Qin
authors.initials: Q
authors.lastname: Li
authors.forename: Guangshan
authors.initials: G
authors.lastname: Zhu