title: 2D l-Di-toluoyl-tartaric acid Lanthanide Coordination Polymers: Toward Single-component White-Light and NIR Luminescent Materials.
abstract: A series of five l-di-p-toluoyl-tartaric acid (l-DTTA) lanthanide coordination polymers, namely {[Ln4 K(4)  L6 (H2O)x ]⋅yH2 O}n , [Ln=Dy (1), x=24, y=12; Ln=Ho (2), x=23, y=12; Ln=Er (3), x=24, y=12; Ln=Yb (4), x=24, y=11; Ln=Lu (5), x=24, y=12] have been isolated by simple reactions of H2L (H2 L= L-DTTA) with LnCl3 ⋅6 H2O at ambient temperature. X-ray crystallographic analysis reveals that complexes 1-5 feature two-dimensional (2D) network structures in which the Ln(3+) ions are bridged by carboxylate groups of ligands in two unique coordinated modes. Luminescent spectra demonstrate that complex 1 realizes single-component white-light emission, while complexes 2-4 exhibit a characteristic near-infrared (NIR) luminescence in the solid state at room temperature.
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry (MOE), P. R. China, School of Chemistry and Materials Science, Heilongjiang University, Harbin, 150080, P. R. China.
authors.forename: Wan-Ying
authors.initials: WY
authors.lastname: Niu
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry (MOE), P. R. China, School of Chemistry and Materials Science, Heilongjiang University, Harbin, 150080, P. R. China.
authors.forename: Jing-Wen
authors.initials: JW
authors.lastname: Sun
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry (MOE), P. R. China, School of Chemistry and Materials Science, Heilongjiang University, Harbin, 150080, P. R. China.
authors.forename: Peng-Fei
authors.initials: PF
authors.lastname: Yan
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry (MOE), P. R. China, School of Chemistry and Materials Science, Heilongjiang University, Harbin, 150080, P. R. China.
authors.forename: Yu-Xin
authors.initials: YX
authors.lastname: Li
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry (MOE), P. R. China, School of Chemistry and Materials Science, Heilongjiang University, Harbin, 150080, P. R. China.
authors.forename: Guang-Hui
authors.initials: GH
authors.lastname: An
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry (MOE), P. R. China, School of Chemistry and Materials Science, Heilongjiang University, Harbin, 150080, P. R. China. gmli_2000@163.com.
authors.forename: Guang-Ming
authors.initials: GM
authors.lastname: Li
keywords: coordination polymers; l-di-toluoyl-tartaric acid; lanthanides; luminescence; near-infrared; white-light emission