title: Synthesis, Structure, and Photoluminescence of Color-Tunable and White-Light-Emitting Lanthanide Metal-Organic Open Frameworks Composed of AlMo6(OH)6O183-Polyanion and Nicotinate.
abstract: A series of isostructural compounds Na(HL)(CH3COO)Ln(Al(OH)6Mo6O18)(H2O)6·10H2O [L = nicotinate; Ln = Eu (1), Tb (2)] and Na(HL)(CH3COO)EumTbnLa1-m-n(AlMo6(OH)6O18)(H2O)6·10H2O (3-8, L = nicotinate), wherein Anderson-type polyanions AlMo6(OH)6O183-as basic inorganic building blocks are connected by Eu(CH3COO)(HL)(H2O)3]24+and [Na2(H2O)8]2+cations, resulting in formation of three-dimensional lanthanide metal-organic open frameworks, were synthesized successfully with AlCl3·6H2O, Na2MoO4·2H2O, nicotinic acid, and lanthanide nitrates as starting materials. The compounds were characterized by UV-vis, IR, elemental analysis, powder XRD, and TG-DTA measurements. The single-crystal structures of compounds 1 and 2 show that the two compounds display three-dimensional open frameworks with 1D channels along the b and c axes. Investigation of the energy transfer mechanism indicated that the organic nicotinate ligand can transfer energy efficiently to Tb3+rather than Eu3+. The influence of the POM moiety on the fluorescence of the compounds is also studied. Compounds 1-8 exhibit tunable luminescence color, and emitting of white light was realized through adjusting the molar ratio of Eu:Tb:La within the compounds.
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Institute of Science, Beijing University of Chemical Technology , Beijing 100029, P. R. China.
authors.forename: Huanyao
authors.initials: H
authors.lastname: Ji
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Institute of Science, Beijing University of Chemical Technology , Beijing 100029, P. R. China.
authors.forename: Xiaomin
authors.initials: X
authors.lastname: Li
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Institute of Science, Beijing University of Chemical Technology , Beijing 100029, P. R. China.
authors.forename: Donghua
authors.initials: D
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Institute of Science, Beijing University of Chemical Technology , Beijing 100029, P. R. China.
authors.forename: Yunshan
authors.identifier: http://orcid.org/0000-0003-0143-7370
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Institute of Science, Beijing University of Chemical Technology , Beijing 100029, P. R. China.
authors.forename: Lijuan
authors.initials: L
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Institute of Science, Beijing University of Chemical Technology , Beijing 100029, P. R. China.
authors.forename: Zareen
authors.initials: Z
authors.lastname: Zuhra
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Institute of Science, Beijing University of Chemical Technology , Beijing 100029, P. R. China.
authors.forename: Shaowei
authors.initials: S
authors.lastname: Yang