title: Series d-f Heteronuclear Metal-Organic Frameworks: Color Tunability and Luminescent Probe with Switchable Properties.
abstract: A series of five unique d-f heteronuclear luminescent metal-organic frameworks (MOFs) in an entangled polyrotaxane array and the light-harvesting block homonuclear zinc compound have been isolated successfully and characterized. The series of isostructural polymers feature 3,4-connected (4.82)(4.83.92)(6.8.9)2(6.92)(83) topology and high stability, exhibiting diverse void spaces. By taking advantage of the isostructural MOFs 2 and 3, the intensities of red and green emissions can be modulated by adjusting the ratios of EuIIIand TbIIIions correspondingly, and white-light emission can be generated by a combination of different doped TbIIIand EuIIIconcentrations. The Tb-Zn-based framework {[Tb3Zn6(bipy2)2(Hmimda)7(H2O)3]·5H2O}n(3; H3mimda = 2-methyl-1-H-imidazole-4,5-dicarboxylic acid and bipy = 4,4'-bipyridine) can detect trace MgIIion with relatively high sensitivity and selectivity. Dehydrated MOF 3a shows a remarkable emission quenching effect through the introduction of I2solids. Further investigation indicates that it exhibits turn on/off switchable properties for small solvent molecules or heavy-metal ions. Steady/transient-state near-IR luminescence properties for MOFs 1, 4, and 5 were investigated under visible-light excitation.
authors.affiliation: Henan Key Laboratory of Function Oriented Porous Materials, College of Chemistry and Chemical Engineering and Luoyang Normal University , Luoyang 471934, China.
authors.forename: Xun
authors.initials: X
authors.lastname: Feng
authors.affiliation: College of Chemistry and Pharmacy Engineering, Nanyang Normal University , Nanyang 473601, China.
authors.forename: Yuquan
authors.initials: Y
authors.lastname: Feng
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou 450001, China.
authors.forename: Nan
authors.initials: N
authors.lastname: Guo
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou 450001, China.
authors.forename: Yiling
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Henan Key Laboratory of Function Oriented Porous Materials, College of Chemistry and Chemical Engineering and Luoyang Normal University , Luoyang 471934, China.
authors.forename: Tian
authors.initials: T
authors.lastname: Zhang
authors.affiliation: Henan Key Laboratory of Function Oriented Porous Materials, College of Chemistry and Chemical Engineering and Luoyang Normal University , Luoyang 471934, China.
authors.forename: Lufang
authors.initials: L
authors.lastname: Ma
authors.affiliation: College of Chemistry and Pharmacy Engineering, Nanyang Normal University , Nanyang 473601, China.
authors.forename: Liya
authors.identifier: http://orcid.org/0000-0001-9125-859X
authors.initials: L
authors.lastname: Wang